/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/popl20/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:59:24,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:59:24,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:59:24,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 20:59:24,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 20:59:24,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 20:59:24,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 20:59:24,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 20:59:24,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 20:59:24,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 20:59:24,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 20:59:24,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 20:59:24,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 20:59:24,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 20:59:24,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 20:59:24,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 20:59:24,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 20:59:24,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 20:59:24,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 20:59:24,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 20:59:24,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 20:59:24,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 20:59:24,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 20:59:24,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 20:59:24,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-12 20:59:24,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-12 20:59:24,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-12 20:59:24,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-12 20:59:24,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-12 20:59:24,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-12 20:59:24,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 20:59:24,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 20:59:24,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 20:59:24,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 20:59:24,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 20:59:24,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 20:59:24,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 20:59:24,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 20:59:24,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:59:24,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:59:24,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:59:24,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:59:24,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:59:24,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:59:24,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:59:24,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:59:24,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:59:24,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:59:24,514 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:59:24,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:59:24,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:59:24,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:59:24,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:59:24,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:59:24,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:59:24,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:59:24,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:59:24,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:59:24,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:59:24,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:59:24,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:59:24,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:59:24,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:59:24,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:59:24,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:59:24,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:59:24,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:59:24,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:59:24,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:59:24,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:59:24,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:59:24,518 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:59:24,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:59:24,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:59:24,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:59:24,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:59:24,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:59:24,846 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:59:24,849 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:59:24,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-06-12 20:59:24,850 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-06-12 20:59:24,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:59:24,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:59:24,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:59:24,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:59:24,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:59:24,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:59:24,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:59:24,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:59:24,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:59:24,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... [2021-06-12 20:59:24,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:59:24,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:59:24,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:59:24,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:59:24,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:59:25,030 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:59:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:59:25,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:59:25,031 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:59:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:59:25,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:59:25,032 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:59:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:59:25,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:59:25,032 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:59:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:59:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:59:25,033 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:59:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:59:25,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:59:25,035 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:59:25,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:59:25,282 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:59:25,283 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:59:25 BoogieIcfgContainer [2021-06-12 20:59:25,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:59:25,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:59:25,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:59:25,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:59:25,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:24" (1/2) ... [2021-06-12 20:59:25,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f33117 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:59:25, skipping insertion in model container [2021-06-12 20:59:25,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:59:25" (2/2) ... [2021-06-12 20:59:25,290 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-06-12 20:59:25,294 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:59:25,294 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:59:25,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:59:25,295 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:59:25,345 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 20:59:25,362 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-12 20:59:25,378 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:59:25,378 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:59:25,379 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:59:25,379 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:59:25,379 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:59:25,379 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:59:25,379 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:59:25,379 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:59:25,386 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-06-12 20:59:25,462 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:59:25,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:25,490 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:25,490 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:25,499 INFO L82 PathProgramCache]: Analyzing trace with hash -596639688, now seen corresponding path program 1 times [2021-06-12 20:59:25,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:25,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423218834] [2021-06-12 20:59:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:25,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:25,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423218834] [2021-06-12 20:59:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423218834] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:25,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:25,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769693736] [2021-06-12 20:59:25,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:25,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:25,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:25,736 INFO L87 Difference]: Start difference. First operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:25,830 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2021-06-12 20:59:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-12 20:59:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:25,849 INFO L225 Difference]: With dead ends: 961 [2021-06-12 20:59:25,850 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 20:59:25,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 20:59:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-06-12 20:59:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2021-06-12 20:59:25,944 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2021-06-12 20:59:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:25,945 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2021-06-12 20:59:25,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2021-06-12 20:59:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:59:25,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:25,950 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:25,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:59:25,951 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash 616979414, now seen corresponding path program 2 times [2021-06-12 20:59:25,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:25,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898698738] [2021-06-12 20:59:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:26,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898698738] [2021-06-12 20:59:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898698738] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:26,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:26,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:59:26,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496338577] [2021-06-12 20:59:26,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:26,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:26,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:26,014 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:26,124 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2021-06-12 20:59:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-12 20:59:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:26,136 INFO L225 Difference]: With dead ends: 2435 [2021-06-12 20:59:26,136 INFO L226 Difference]: Without dead ends: 1497 [2021-06-12 20:59:26,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-06-12 20:59:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2021-06-12 20:59:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-06-12 20:59:26,187 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-06-12 20:59:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:26,187 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-06-12 20:59:26,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-06-12 20:59:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:59:26,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:26,191 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:26,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:59:26,192 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-06-12 20:59:26,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:26,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46603750] [2021-06-12 20:59:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:26,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:26,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46603750] [2021-06-12 20:59:26,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46603750] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:26,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:26,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:59:26,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776992785] [2021-06-12 20:59:26,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:26,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:26,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:26,240 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:26,357 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-06-12 20:59:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-12 20:59:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:26,376 INFO L225 Difference]: With dead ends: 3289 [2021-06-12 20:59:26,376 INFO L226 Difference]: Without dead ends: 2391 [2021-06-12 20:59:26,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-12 20:59:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-06-12 20:59:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-06-12 20:59:26,451 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-06-12 20:59:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:26,451 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-06-12 20:59:26,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-06-12 20:59:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:59:26,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:26,454 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:26,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:59:26,455 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-06-12 20:59:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:26,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90826145] [2021-06-12 20:59:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:26,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:26,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90826145] [2021-06-12 20:59:26,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90826145] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:26,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:26,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:26,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572352951] [2021-06-12 20:59:26,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:26,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:26,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:26,510 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:26,531 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-06-12 20:59:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-06-12 20:59:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:26,537 INFO L225 Difference]: With dead ends: 1081 [2021-06-12 20:59:26,537 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 20:59:26,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 20:59:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-06-12 20:59:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-06-12 20:59:26,563 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-06-12 20:59:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:26,563 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-06-12 20:59:26,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-06-12 20:59:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:59:26,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:26,566 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:26,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:59:26,566 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1603494326, now seen corresponding path program 1 times [2021-06-12 20:59:26,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:26,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825608499] [2021-06-12 20:59:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:26,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825608499] [2021-06-12 20:59:26,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825608499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:26,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017130680] [2021-06-12 20:59:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:59:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:26,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017130680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:26,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:26,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 20:59:26,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756394418] [2021-06-12 20:59:26,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:59:26,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:59:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:26,822 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:26,883 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-06-12 20:59:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:59:26,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 25 [2021-06-12 20:59:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:26,895 INFO L225 Difference]: With dead ends: 1914 [2021-06-12 20:59:26,896 INFO L226 Difference]: Without dead ends: 1914 [2021-06-12 20:59:26,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-06-12 20:59:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-06-12 20:59:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-06-12 20:59:26,940 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-06-12 20:59:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:26,941 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-06-12 20:59:26,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-06-12 20:59:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:59:26,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:26,946 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:27,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:27,173 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1044941832, now seen corresponding path program 1 times [2021-06-12 20:59:27,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:27,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018152162] [2021-06-12 20:59:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:27,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:27,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018152162] [2021-06-12 20:59:27,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018152162] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:27,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:27,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229176834] [2021-06-12 20:59:27,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:27,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:27,203 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:27,257 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-06-12 20:59:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:27,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 20:59:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:27,266 INFO L225 Difference]: With dead ends: 1486 [2021-06-12 20:59:27,266 INFO L226 Difference]: Without dead ends: 1456 [2021-06-12 20:59:27,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-06-12 20:59:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-06-12 20:59:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-06-12 20:59:27,307 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-06-12 20:59:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:27,307 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-06-12 20:59:27,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-06-12 20:59:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:59:27,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:27,312 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:27,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:59:27,312 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:27,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1204324088, now seen corresponding path program 1 times [2021-06-12 20:59:27,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:27,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358674659] [2021-06-12 20:59:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:27,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:27,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358674659] [2021-06-12 20:59:27,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358674659] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:27,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468890629] [2021-06-12 20:59:27,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:27,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:27,357 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:27,408 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2021-06-12 20:59:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:27,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 20:59:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:27,419 INFO L225 Difference]: With dead ends: 1766 [2021-06-12 20:59:27,420 INFO L226 Difference]: Without dead ends: 1644 [2021-06-12 20:59:27,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-06-12 20:59:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2021-06-12 20:59:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2021-06-12 20:59:27,468 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2021-06-12 20:59:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:27,468 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2021-06-12 20:59:27,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2021-06-12 20:59:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:59:27,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:27,474 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:27,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:59:27,474 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1327684600, now seen corresponding path program 2 times [2021-06-12 20:59:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:27,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105952592] [2021-06-12 20:59:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:27,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:27,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105952592] [2021-06-12 20:59:27,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105952592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:27,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730071457] [2021-06-12 20:59:27,575 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:27,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:27,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:59:27,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:27,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730071457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:27,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:27,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-12 20:59:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877297875] [2021-06-12 20:59:27,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:27,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:27,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:27,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:27,704 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:28,513 INFO L93 Difference]: Finished difference Result 6173 states and 21367 transitions. [2021-06-12 20:59:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:59:28,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 25 [2021-06-12 20:59:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:28,547 INFO L225 Difference]: With dead ends: 6173 [2021-06-12 20:59:28,547 INFO L226 Difference]: Without dead ends: 3187 [2021-06-12 20:59:28,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:59:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-06-12 20:59:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1397. [2021-06-12 20:59:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.4978510028653296) internal successors, (4883), 1396 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4883 transitions. [2021-06-12 20:59:28,612 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4883 transitions. Word has length 25 [2021-06-12 20:59:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:28,612 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4883 transitions. [2021-06-12 20:59:28,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4883 transitions. [2021-06-12 20:59:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:59:28,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:28,616 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:28,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:28,845 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash 566728726, now seen corresponding path program 2 times [2021-06-12 20:59:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:28,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828535009] [2021-06-12 20:59:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:28,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:28,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828535009] [2021-06-12 20:59:28,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828535009] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:28,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:28,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:28,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074226289] [2021-06-12 20:59:28,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:28,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:28,882 INFO L87 Difference]: Start difference. First operand 1397 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:28,930 INFO L93 Difference]: Finished difference Result 1523 states and 5204 transitions. [2021-06-12 20:59:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:28,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 20:59:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:28,935 INFO L225 Difference]: With dead ends: 1523 [2021-06-12 20:59:28,935 INFO L226 Difference]: Without dead ends: 1424 [2021-06-12 20:59:28,936 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-06-12 20:59:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1302. [2021-06-12 20:59:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.504227517294389) internal successors, (4559), 1301 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4559 transitions. [2021-06-12 20:59:28,968 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4559 transitions. Word has length 25 [2021-06-12 20:59:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:28,969 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4559 transitions. [2021-06-12 20:59:28,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4559 transitions. [2021-06-12 20:59:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:59:28,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:28,972 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:28,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:59:28,972 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1313441110, now seen corresponding path program 3 times [2021-06-12 20:59:28,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:28,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77190044] [2021-06-12 20:59:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:29,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:29,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77190044] [2021-06-12 20:59:29,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77190044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391449332] [2021-06-12 20:59:29,016 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:29,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:59:29,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:29,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:59:29,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:29,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391449332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:29,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:29,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 20:59:29,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616063034] [2021-06-12 20:59:29,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:59:29,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:29,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:59:29,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:29,113 INFO L87 Difference]: Start difference. First operand 1302 states and 4559 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:29,159 INFO L93 Difference]: Finished difference Result 1384 states and 4841 transitions. [2021-06-12 20:59:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:59:29,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 25 [2021-06-12 20:59:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:29,163 INFO L225 Difference]: With dead ends: 1384 [2021-06-12 20:59:29,164 INFO L226 Difference]: Without dead ends: 1282 [2021-06-12 20:59:29,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-12 20:59:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-06-12 20:59:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5167785234899327) internal successors, (3668), 1043 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3668 transitions. [2021-06-12 20:59:29,190 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3668 transitions. Word has length 25 [2021-06-12 20:59:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:29,190 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3668 transitions. [2021-06-12 20:59:29,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3668 transitions. [2021-06-12 20:59:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:29,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:29,193 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:29,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:59:29,409 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash -873778054, now seen corresponding path program 1 times [2021-06-12 20:59:29,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:29,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285305163] [2021-06-12 20:59:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:29,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285305163] [2021-06-12 20:59:29,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285305163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678978956] [2021-06-12 20:59:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:59:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:29,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-12 20:59:29,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:29,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:29,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:29,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-12 20:59:29,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:59:29,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:29,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:29,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:29,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-12 20:59:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:29,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678978956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:29,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:29,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 20:59:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129439977] [2021-06-12 20:59:29,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:29,842 INFO L87 Difference]: Start difference. First operand 1044 states and 3668 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:30,050 INFO L93 Difference]: Finished difference Result 2466 states and 8751 transitions. [2021-06-12 20:59:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:59:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:30,056 INFO L225 Difference]: With dead ends: 2466 [2021-06-12 20:59:30,056 INFO L226 Difference]: Without dead ends: 1631 [2021-06-12 20:59:30,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:59:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-12 20:59:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1283. [2021-06-12 20:59:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.4672386895475817) internal successors, (4445), 1282 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4445 transitions. [2021-06-12 20:59:30,091 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4445 transitions. Word has length 29 [2021-06-12 20:59:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:30,091 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4445 transitions. [2021-06-12 20:59:30,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4445 transitions. [2021-06-12 20:59:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:30,095 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:30,095 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:30,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:30,318 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash -22453128, now seen corresponding path program 2 times [2021-06-12 20:59:30,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:30,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373451542] [2021-06-12 20:59:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:30,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:30,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373451542] [2021-06-12 20:59:30,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373451542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:30,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101684230] [2021-06-12 20:59:30,405 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:30,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:30,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:59:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:30,495 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 10 treesize of output 7 [2021-06-12 20:59:30,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:30,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-06-12 20:59:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:59:30,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:30,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:59:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:30,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101684230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:30,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:30,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 20:59:30,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818046200] [2021-06-12 20:59:30,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:30,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:30,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:30,591 INFO L87 Difference]: Start difference. First operand 1283 states and 4445 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:30,939 INFO L93 Difference]: Finished difference Result 2852 states and 10126 transitions. [2021-06-12 20:59:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:59:30,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:30,944 INFO L225 Difference]: With dead ends: 2852 [2021-06-12 20:59:30,944 INFO L226 Difference]: Without dead ends: 1150 [2021-06-12 20:59:30,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:59:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-06-12 20:59:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 753. [2021-06-12 20:59:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.466755319148936) internal successors, (2607), 752 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2607 transitions. [2021-06-12 20:59:30,972 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2607 transitions. Word has length 29 [2021-06-12 20:59:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:30,973 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2607 transitions. [2021-06-12 20:59:30,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2607 transitions. [2021-06-12 20:59:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:59:30,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:30,976 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:31,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 20:59:31,197 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1929474972, now seen corresponding path program 3 times [2021-06-12 20:59:31,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:31,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613866770] [2021-06-12 20:59:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:31,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613866770] [2021-06-12 20:59:31,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613866770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:31,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300144017] [2021-06-12 20:59:31,236 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:31,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:59:31,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:59:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:31,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300144017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:31,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:31,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 20:59:31,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218083029] [2021-06-12 20:59:31,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:59:31,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:59:31,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:31,391 INFO L87 Difference]: Start difference. First operand 753 states and 2607 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:31,812 INFO L93 Difference]: Finished difference Result 2449 states and 8696 transitions. [2021-06-12 20:59:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:59:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:59:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:31,819 INFO L225 Difference]: With dead ends: 2449 [2021-06-12 20:59:31,819 INFO L226 Difference]: Without dead ends: 2435 [2021-06-12 20:59:31,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:59:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-12 20:59:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1458. [2021-06-12 20:59:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.723404255319149) internal successors, (5425), 1457 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5425 transitions. [2021-06-12 20:59:31,861 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5425 transitions. Word has length 31 [2021-06-12 20:59:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:31,861 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5425 transitions. [2021-06-12 20:59:31,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5425 transitions. [2021-06-12 20:59:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:59:31,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:31,865 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:32,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:32,081 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash 215625022, now seen corresponding path program 4 times [2021-06-12 20:59:32,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:32,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758809440] [2021-06-12 20:59:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:32,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:32,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758809440] [2021-06-12 20:59:32,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758809440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:32,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761333830] [2021-06-12 20:59:32,112 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:32,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:59:32,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:32,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761333830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:32,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:32,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:59:32,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404689172] [2021-06-12 20:59:32,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:59:32,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:59:32,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:32,233 INFO L87 Difference]: Start difference. First operand 1458 states and 5425 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:32,303 INFO L93 Difference]: Finished difference Result 3104 states and 11373 transitions. [2021-06-12 20:59:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:59:32,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:59:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:32,312 INFO L225 Difference]: With dead ends: 3104 [2021-06-12 20:59:32,312 INFO L226 Difference]: Without dead ends: 3100 [2021-06-12 20:59:32,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:59:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-12 20:59:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1644. [2021-06-12 20:59:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.837492391965916) internal successors, (6305), 1643 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 6305 transitions. [2021-06-12 20:59:32,359 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 6305 transitions. Word has length 33 [2021-06-12 20:59:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:32,359 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 6305 transitions. [2021-06-12 20:59:32,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 6305 transitions. [2021-06-12 20:59:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:59:32,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:32,363 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:32,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:59:32,577 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1617454150, now seen corresponding path program 5 times [2021-06-12 20:59:32,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:32,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340889581] [2021-06-12 20:59:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:32,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:32,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340889581] [2021-06-12 20:59:32,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340889581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:32,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288558151] [2021-06-12 20:59:32,608 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:32,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:59:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:32,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288558151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:32,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:32,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:59:32,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876072212] [2021-06-12 20:59:32,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:59:32,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:32,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:59:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:32,710 INFO L87 Difference]: Start difference. First operand 1644 states and 6305 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:32,787 INFO L93 Difference]: Finished difference Result 3039 states and 11040 transitions. [2021-06-12 20:59:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:59:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:32,798 INFO L225 Difference]: With dead ends: 3039 [2021-06-12 20:59:32,798 INFO L226 Difference]: Without dead ends: 3039 [2021-06-12 20:59:32,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-06-12 20:59:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1619. [2021-06-12 20:59:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.857849196538937) internal successors, (6242), 1618 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 6242 transitions. [2021-06-12 20:59:32,859 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 6242 transitions. Word has length 33 [2021-06-12 20:59:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:32,859 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 6242 transitions. [2021-06-12 20:59:32,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 6242 transitions. [2021-06-12 20:59:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:59:32,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:32,864 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:33,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:59:33,077 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -461930502, now seen corresponding path program 6 times [2021-06-12 20:59:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:33,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879126848] [2021-06-12 20:59:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:33,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879126848] [2021-06-12 20:59:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879126848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925020799] [2021-06-12 20:59:33,107 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:33,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:59:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:33,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:59:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:33,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925020799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:33,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:33,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 20:59:33,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328439391] [2021-06-12 20:59:33,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:59:33,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:59:33,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:33,261 INFO L87 Difference]: Start difference. First operand 1619 states and 6242 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:33,977 INFO L93 Difference]: Finished difference Result 7858 states and 29355 transitions. [2021-06-12 20:59:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:59:33,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:59:33,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:34,001 INFO L225 Difference]: With dead ends: 7858 [2021-06-12 20:59:34,002 INFO L226 Difference]: Without dead ends: 7378 [2021-06-12 20:59:34,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:59:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-06-12 20:59:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3747. [2021-06-12 20:59:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 4.203150026695141) internal successors, (15745), 3746 states have internal predecessors, (15745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 15745 transitions. [2021-06-12 20:59:34,152 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 15745 transitions. Word has length 33 [2021-06-12 20:59:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:34,152 INFO L482 AbstractCegarLoop]: Abstraction has 3747 states and 15745 transitions. [2021-06-12 20:59:34,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 15745 transitions. [2021-06-12 20:59:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:59:34,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:34,161 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:34,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 20:59:34,377 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 685612088, now seen corresponding path program 7 times [2021-06-12 20:59:34,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:34,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120740658] [2021-06-12 20:59:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:34,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:34,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120740658] [2021-06-12 20:59:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120740658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:34,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906519414] [2021-06-12 20:59:34,416 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:34,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906519414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:34,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:34,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:59:34,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962552378] [2021-06-12 20:59:34,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:59:34,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:59:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:34,543 INFO L87 Difference]: Start difference. First operand 3747 states and 15745 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:34,626 INFO L93 Difference]: Finished difference Result 5515 states and 21821 transitions. [2021-06-12 20:59:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:59:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:34,676 INFO L225 Difference]: With dead ends: 5515 [2021-06-12 20:59:34,676 INFO L226 Difference]: Without dead ends: 5515 [2021-06-12 20:59:34,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2021-06-12 20:59:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3848. [2021-06-12 20:59:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.193137509747856) internal successors, (16131), 3847 states have internal predecessors, (16131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16131 transitions. [2021-06-12 20:59:34,771 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16131 transitions. Word has length 33 [2021-06-12 20:59:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:34,771 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16131 transitions. [2021-06-12 20:59:34,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16131 transitions. [2021-06-12 20:59:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:59:34,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:34,781 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:35,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:59:35,005 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1338680964, now seen corresponding path program 8 times [2021-06-12 20:59:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:35,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560233524] [2021-06-12 20:59:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:35,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:35,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560233524] [2021-06-12 20:59:35,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560233524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:35,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410300410] [2021-06-12 20:59:35,044 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:35,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:35,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410300410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:35,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:35,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 20:59:35,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614449619] [2021-06-12 20:59:35,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:35,152 INFO L87 Difference]: Start difference. First operand 3848 states and 16131 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:35,256 INFO L93 Difference]: Finished difference Result 5599 states and 22264 transitions. [2021-06-12 20:59:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:59:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:35,270 INFO L225 Difference]: With dead ends: 5599 [2021-06-12 20:59:35,270 INFO L226 Difference]: Without dead ends: 5599 [2021-06-12 20:59:35,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-06-12 20:59:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 4158. [2021-06-12 20:59:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.1554005292278084) internal successors, (17274), 4157 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17274 transitions. [2021-06-12 20:59:35,425 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17274 transitions. Word has length 33 [2021-06-12 20:59:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:35,426 INFO L482 AbstractCegarLoop]: Abstraction has 4158 states and 17274 transitions. [2021-06-12 20:59:35,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:35,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17274 transitions. [2021-06-12 20:59:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:35,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:35,438 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:35,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:59:35,653 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1085770464, now seen corresponding path program 9 times [2021-06-12 20:59:35,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:35,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032151168] [2021-06-12 20:59:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:35,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:35,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032151168] [2021-06-12 20:59:35,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032151168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:35,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195986020] [2021-06-12 20:59:35,834 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:35,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:59:35,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:59:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:36,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:36,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 20:59:36,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:36,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 20:59:36,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:36,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:36,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:59:36,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-06-12 20:59:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-06-12 20:59:36,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:36,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:36,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-06-12 20:59:36,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:36,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:36,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:59:36,130 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:43 [2021-06-12 20:59:36,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:59:36,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:36,446 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.0 percent of original size [2021-06-12 20:59:36,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 20:59:36,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:36,457 INFO L628 ElimStorePlain]: treesize reduction 6, result has 45.5 percent of original size [2021-06-12 20:59:36,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:36,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:5 [2021-06-12 20:59:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:36,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195986020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:36,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:36,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2021-06-12 20:59:36,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574140681] [2021-06-12 20:59:36,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:59:36,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:36,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:59:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:59:36,478 INFO L87 Difference]: Start difference. First operand 4158 states and 17274 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:37,591 INFO L93 Difference]: Finished difference Result 9317 states and 38403 transitions. [2021-06-12 20:59:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:59:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 20:59:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:37,603 INFO L225 Difference]: With dead ends: 9317 [2021-06-12 20:59:37,603 INFO L226 Difference]: Without dead ends: 4302 [2021-06-12 20:59:37,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 744.1ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:59:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-06-12 20:59:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 4250. [2021-06-12 20:59:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 4.120498940927277) internal successors, (17508), 4249 states have internal predecessors, (17508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 17508 transitions. [2021-06-12 20:59:37,700 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 17508 transitions. Word has length 35 [2021-06-12 20:59:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:37,700 INFO L482 AbstractCegarLoop]: Abstraction has 4250 states and 17508 transitions. [2021-06-12 20:59:37,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 17508 transitions. [2021-06-12 20:59:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:37,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:37,711 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:37,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:37,921 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -436856958, now seen corresponding path program 10 times [2021-06-12 20:59:37,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:37,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653616132] [2021-06-12 20:59:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:38,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:38,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653616132] [2021-06-12 20:59:38,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653616132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:38,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474113572] [2021-06-12 20:59:38,111 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:38,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:59:38,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:38,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:59:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:38,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 20:59:38,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 20:59:38,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:38,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:38,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:59:38,313 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:39 [2021-06-12 20:59:38,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 20:59:38,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:38,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 20:59:38,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:38,470 INFO L628 ElimStorePlain]: treesize reduction 23, result has 11.5 percent of original size [2021-06-12 20:59:38,470 INFO L518 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2021-06-12 20:59:38,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:38,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:3 [2021-06-12 20:59:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:38,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474113572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:38,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:38,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 20:59:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944793240] [2021-06-12 20:59:38,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:59:38,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:38,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:59:38,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:59:38,489 INFO L87 Difference]: Start difference. First operand 4250 states and 17508 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:39,152 INFO L93 Difference]: Finished difference Result 9382 states and 37522 transitions. [2021-06-12 20:59:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:59:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 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 35 [2021-06-12 20:59:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:39,161 INFO L225 Difference]: With dead ends: 9382 [2021-06-12 20:59:39,162 INFO L226 Difference]: Without dead ends: 4508 [2021-06-12 20:59:39,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:59:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-06-12 20:59:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4326. [2021-06-12 20:59:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 4.0920231213872835) internal successors, (17698), 4325 states have internal predecessors, (17698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 17698 transitions. [2021-06-12 20:59:39,254 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 17698 transitions. Word has length 35 [2021-06-12 20:59:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:39,254 INFO L482 AbstractCegarLoop]: Abstraction has 4326 states and 17698 transitions. [2021-06-12 20:59:39,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 17698 transitions. [2021-06-12 20:59:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:39,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:39,264 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:39,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:59:39,481 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 804357182, now seen corresponding path program 11 times [2021-06-12 20:59:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:39,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990403742] [2021-06-12 20:59:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:39,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990403742] [2021-06-12 20:59:39,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990403742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840047198] [2021-06-12 20:59:39,522 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:39,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:59:39,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:59:39,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840047198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:39,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:39,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 20:59:39,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933904233] [2021-06-12 20:59:39,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:39,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:39,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:39,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:39,675 INFO L87 Difference]: Start difference. First operand 4326 states and 17698 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:39,784 INFO L93 Difference]: Finished difference Result 6092 states and 23684 transitions. [2021-06-12 20:59:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 20:59:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:39,798 INFO L225 Difference]: With dead ends: 6092 [2021-06-12 20:59:39,798 INFO L226 Difference]: Without dead ends: 6080 [2021-06-12 20:59:39,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2021-06-12 20:59:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 4576. [2021-06-12 20:59:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.078032786885246) internal successors, (18657), 4575 states have internal predecessors, (18657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18657 transitions. [2021-06-12 20:59:39,934 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18657 transitions. Word has length 37 [2021-06-12 20:59:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:39,935 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 18657 transitions. [2021-06-12 20:59:39,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18657 transitions. [2021-06-12 20:59:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:39,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:39,946 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:40,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:40,161 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:40,161 INFO L82 PathProgramCache]: Analyzing trace with hash 550256378, now seen corresponding path program 12 times [2021-06-12 20:59:40,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:40,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854802658] [2021-06-12 20:59:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:40,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:40,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854802658] [2021-06-12 20:59:40,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854802658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:40,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998026340] [2021-06-12 20:59:40,203 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:40,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:59:40,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:40,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998026340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:40,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:40,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 20:59:40,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406808342] [2021-06-12 20:59:40,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:40,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:40,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:40,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:40,306 INFO L87 Difference]: Start difference. First operand 4576 states and 18657 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:40,439 INFO L93 Difference]: Finished difference Result 9156 states and 35918 transitions. [2021-06-12 20:59:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:59:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 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 37 [2021-06-12 20:59:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:40,459 INFO L225 Difference]: With dead ends: 9156 [2021-06-12 20:59:40,459 INFO L226 Difference]: Without dead ends: 9136 [2021-06-12 20:59:40,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-06-12 20:59:40,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 5812. [2021-06-12 20:59:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 4.22715539494063) internal successors, (24564), 5811 states have internal predecessors, (24564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 24564 transitions. [2021-06-12 20:59:40,645 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 24564 transitions. Word has length 37 [2021-06-12 20:59:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:40,646 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 24564 transitions. [2021-06-12 20:59:40,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 24564 transitions. [2021-06-12 20:59:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:40,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:40,660 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:40,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 20:59:40,875 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:40,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1282822794, now seen corresponding path program 13 times [2021-06-12 20:59:40,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:40,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119285097] [2021-06-12 20:59:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:40,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119285097] [2021-06-12 20:59:40,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119285097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183213466] [2021-06-12 20:59:40,910 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:40,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:41,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183213466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:41,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:41,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 20:59:41,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837276404] [2021-06-12 20:59:41,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:41,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:41,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:41,027 INFO L87 Difference]: Start difference. First operand 5812 states and 24564 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:41,159 INFO L93 Difference]: Finished difference Result 9442 states and 37337 transitions. [2021-06-12 20:59:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:59:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 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 37 [2021-06-12 20:59:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:41,179 INFO L225 Difference]: With dead ends: 9442 [2021-06-12 20:59:41,179 INFO L226 Difference]: Without dead ends: 9442 [2021-06-12 20:59:41,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-06-12 20:59:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 5125. [2021-06-12 20:59:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 4.132708821233411) internal successors, (21176), 5124 states have internal predecessors, (21176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 21176 transitions. [2021-06-12 20:59:41,366 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 21176 transitions. Word has length 37 [2021-06-12 20:59:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:41,366 INFO L482 AbstractCegarLoop]: Abstraction has 5125 states and 21176 transitions. [2021-06-12 20:59:41,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 21176 transitions. [2021-06-12 20:59:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:41,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:41,376 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:41,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:41,577 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash 987851450, now seen corresponding path program 14 times [2021-06-12 20:59:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:41,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567106605] [2021-06-12 20:59:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:41,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:41,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567106605] [2021-06-12 20:59:41,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567106605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:41,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585221791] [2021-06-12 20:59:41,625 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:41,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:41,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:41,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585221791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:41,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:41,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 20:59:41,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136747464] [2021-06-12 20:59:41,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:59:41,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:59:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:59:41,793 INFO L87 Difference]: Start difference. First operand 5125 states and 21176 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:41,935 INFO L93 Difference]: Finished difference Result 8511 states and 32921 transitions. [2021-06-12 20:59:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:59:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 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 37 [2021-06-12 20:59:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:41,954 INFO L225 Difference]: With dead ends: 8511 [2021-06-12 20:59:41,954 INFO L226 Difference]: Without dead ends: 8511 [2021-06-12 20:59:41,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:59:41,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-06-12 20:59:42,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4053. [2021-06-12 20:59:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 4.028874629812439) internal successors, (16325), 4052 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 16325 transitions. [2021-06-12 20:59:42,093 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 16325 transitions. Word has length 37 [2021-06-12 20:59:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:42,093 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 16325 transitions. [2021-06-12 20:59:42,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 16325 transitions. [2021-06-12 20:59:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:42,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:42,101 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:42,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 20:59:42,301 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:42,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1447205570, now seen corresponding path program 15 times [2021-06-12 20:59:42,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:42,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319287340] [2021-06-12 20:59:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:42,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:42,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319287340] [2021-06-12 20:59:42,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319287340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:42,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644154233] [2021-06-12 20:59:42,367 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:42,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:59:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:59:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:42,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644154233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:42,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:42,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 20:59:42,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163983880] [2021-06-12 20:59:42,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:59:42,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:59:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:59:42,546 INFO L87 Difference]: Start difference. First operand 4053 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:43,669 INFO L93 Difference]: Finished difference Result 11628 states and 44736 transitions. [2021-06-12 20:59:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:59:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 20:59:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:43,692 INFO L225 Difference]: With dead ends: 11628 [2021-06-12 20:59:43,692 INFO L226 Difference]: Without dead ends: 11024 [2021-06-12 20:59:43,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=1036, Invalid=3520, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:59:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2021-06-12 20:59:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 5085. [2021-06-12 20:59:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.030881195908734) internal successors, (20493), 5084 states have internal predecessors, (20493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 20493 transitions. [2021-06-12 20:59:43,835 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 20493 transitions. Word has length 37 [2021-06-12 20:59:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:43,835 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 20493 transitions. [2021-06-12 20:59:43,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 20493 transitions. [2021-06-12 20:59:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:59:43,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:43,847 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-12 20:59:44,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:59:44,057 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2010083624, now seen corresponding path program 16 times [2021-06-12 20:59:44,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:44,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592981267] [2021-06-12 20:59:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:59:44,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:44,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592981267] [2021-06-12 20:59:44,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592981267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:44,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69373775] [2021-06-12 20:59:44,112 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:44,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:59:44,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:59:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:59:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69373775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:44,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:44,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 20:59:44,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748133918] [2021-06-12 20:59:44,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:44,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:44,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:44,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:44,272 INFO L87 Difference]: Start difference. First operand 5085 states and 20493 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:44,414 INFO L93 Difference]: Finished difference Result 12069 states and 47387 transitions. [2021-06-12 20:59:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:59:44,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:59:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:44,438 INFO L225 Difference]: With dead ends: 12069 [2021-06-12 20:59:44,438 INFO L226 Difference]: Without dead ends: 12069 [2021-06-12 20:59:44,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:59:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2021-06-12 20:59:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 8160. [2021-06-12 20:59:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 4.160804020100502) internal successors, (33948), 8159 states have internal predecessors, (33948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 33948 transitions. [2021-06-12 20:59:44,626 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 33948 transitions. Word has length 39 [2021-06-12 20:59:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:44,626 INFO L482 AbstractCegarLoop]: Abstraction has 8160 states and 33948 transitions. [2021-06-12 20:59:44,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 33948 transitions. [2021-06-12 20:59:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:59:44,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:44,641 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2021-06-12 20:59:44,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 20:59:44,845 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash -657746618, now seen corresponding path program 17 times [2021-06-12 20:59:44,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:44,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113320451] [2021-06-12 20:59:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 20:59:44,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113320451] [2021-06-12 20:59:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113320451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339289616] [2021-06-12 20:59:44,890 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:44,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:59:44,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:59:44,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:59:45,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339289616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:45,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:45,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-12 20:59:45,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493135044] [2021-06-12 20:59:45,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:59:45,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:45,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:59:45,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:59:45,099 INFO L87 Difference]: Start difference. First operand 8160 states and 33948 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:46,439 INFO L93 Difference]: Finished difference Result 26614 states and 103468 transitions. [2021-06-12 20:59:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 20:59:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 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 41 [2021-06-12 20:59:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:46,506 INFO L225 Difference]: With dead ends: 26614 [2021-06-12 20:59:46,506 INFO L226 Difference]: Without dead ends: 25436 [2021-06-12 20:59:46,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 858.2ms TimeCoverageRelationStatistics Valid=1482, Invalid=5658, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 20:59:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25436 states. [2021-06-12 20:59:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25436 to 15198. [2021-06-12 20:59:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15198 states, 15197 states have (on average 4.284727248799105) internal successors, (65115), 15197 states have internal predecessors, (65115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15198 states to 15198 states and 65115 transitions. [2021-06-12 20:59:47,016 INFO L78 Accepts]: Start accepts. Automaton has 15198 states and 65115 transitions. Word has length 41 [2021-06-12 20:59:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:47,016 INFO L482 AbstractCegarLoop]: Abstraction has 15198 states and 65115 transitions. [2021-06-12 20:59:47,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 15198 states and 65115 transitions. [2021-06-12 20:59:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:59:47,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:47,045 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2021-06-12 20:59:47,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:59:47,249 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash -869101180, now seen corresponding path program 18 times [2021-06-12 20:59:47,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:47,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367555186] [2021-06-12 20:59:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:59:47,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367555186] [2021-06-12 20:59:47,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367555186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:47,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427637367] [2021-06-12 20:59:47,291 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:47,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:59:47,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:47,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:59:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 20:59:47,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427637367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:47,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:47,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-12 20:59:47,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037501723] [2021-06-12 20:59:47,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:47,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:47,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:47,428 INFO L87 Difference]: Start difference. First operand 15198 states and 65115 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:48,488 INFO L93 Difference]: Finished difference Result 62455 states and 251410 transitions. [2021-06-12 20:59:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:59:48,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 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 41 [2021-06-12 20:59:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:49,092 INFO L225 Difference]: With dead ends: 62455 [2021-06-12 20:59:49,092 INFO L226 Difference]: Without dead ends: 62455 [2021-06-12 20:59:49,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:59:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62455 states. [2021-06-12 20:59:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62455 to 31961. [2021-06-12 20:59:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31961 states, 31960 states have (on average 4.464518147684606) internal successors, (142686), 31960 states have internal predecessors, (142686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31961 states to 31961 states and 142686 transitions. [2021-06-12 20:59:50,587 INFO L78 Accepts]: Start accepts. Automaton has 31961 states and 142686 transitions. Word has length 41 [2021-06-12 20:59:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:50,587 INFO L482 AbstractCegarLoop]: Abstraction has 31961 states and 142686 transitions. [2021-06-12 20:59:50,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 31961 states and 142686 transitions. [2021-06-12 20:59:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:59:50,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:50,680 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:50,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:50,904 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1576576382, now seen corresponding path program 19 times [2021-06-12 20:59:50,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:50,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325931892] [2021-06-12 20:59:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:51,225 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2021-06-12 20:59:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:51,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:51,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325931892] [2021-06-12 20:59:51,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325931892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:51,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257047346] [2021-06-12 20:59:51,407 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:59:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:51,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:59:51,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 13 [2021-06-12 20:59:51,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:51,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:19 [2021-06-12 20:59:51,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-12 20:59:51,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:51,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 20:59:51,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:51,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-06-12 20:59:51,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:51,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-06-12 20:59:51,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:51,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-12 20:59:51,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:59:51,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 12 [2021-06-12 20:59:51,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:51,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:51,980 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:5 [2021-06-12 20:59:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:51,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257047346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:51,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:51,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:59:51,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757220457] [2021-06-12 20:59:51,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:59:51,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:59:51,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:59:51,996 INFO L87 Difference]: Start difference. First operand 31961 states and 142686 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:53,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:53,861 INFO L93 Difference]: Finished difference Result 59369 states and 262032 transitions. [2021-06-12 20:59:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:59:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:59:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:53,978 INFO L225 Difference]: With dead ends: 59369 [2021-06-12 20:59:53,978 INFO L226 Difference]: Without dead ends: 32918 [2021-06-12 20:59:53,979 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1141.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:59:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32918 states. [2021-06-12 20:59:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32918 to 31837. [2021-06-12 20:59:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31837 states, 31836 states have (on average 4.452538007287347) internal successors, (141751), 31836 states have internal predecessors, (141751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31837 states to 31837 states and 141751 transitions. [2021-06-12 20:59:54,831 INFO L78 Accepts]: Start accepts. Automaton has 31837 states and 141751 transitions. Word has length 41 [2021-06-12 20:59:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:54,831 INFO L482 AbstractCegarLoop]: Abstraction has 31837 states and 141751 transitions. [2021-06-12 20:59:54,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 31837 states and 141751 transitions. [2021-06-12 20:59:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:59:55,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:55,065 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:55,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:55,266 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:55,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1594180734, now seen corresponding path program 20 times [2021-06-12 20:59:55,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:55,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634231088] [2021-06-12 20:59:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:59:55,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:55,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634231088] [2021-06-12 20:59:55,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634231088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:55,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883843920] [2021-06-12 20:59:55,435 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:55,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:55,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:59:55,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:55,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-12 20:59:55,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:55,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:55,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:55,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-06-12 20:59:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:55,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 20:59:55,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 20:59:55,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:55,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:55,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:59:55,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-06-12 20:59:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:55,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-06-12 20:59:55,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:55,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:55,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-06-12 20:59:55,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:55,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:55,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:59:55,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-06-12 20:59:56,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:56,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-12 20:59:56,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:59:56,142 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-12 20:59:56,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 20:59:56,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:56,201 INFO L628 ElimStorePlain]: treesize reduction 5, result has 93.5 percent of original size [2021-06-12 20:59:56,208 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 20:59:56,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 20:59:56,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:56,220 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 20:59:56,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 15 [2021-06-12 20:59:56,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:56,230 INFO L628 ElimStorePlain]: treesize reduction 20, result has 20.0 percent of original size [2021-06-12 20:59:56,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:56,231 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-06-12 20:59:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:56,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883843920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:56,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:56,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:59:56,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374875009] [2021-06-12 20:59:56,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:59:56,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:56,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:59:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:59:56,256 INFO L87 Difference]: Start difference. First operand 31837 states and 141751 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:57,558 INFO L93 Difference]: Finished difference Result 71320 states and 312582 transitions. [2021-06-12 20:59:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:59:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:59:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:57,708 INFO L225 Difference]: With dead ends: 71320 [2021-06-12 20:59:57,708 INFO L226 Difference]: Without dead ends: 40777 [2021-06-12 20:59:57,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:59:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40777 states. [2021-06-12 20:59:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40777 to 31018. [2021-06-12 20:59:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31018 states, 31017 states have (on average 4.447851178386046) internal successors, (137959), 31017 states have internal predecessors, (137959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31018 states to 31018 states and 137959 transitions. [2021-06-12 20:59:58,661 INFO L78 Accepts]: Start accepts. Automaton has 31018 states and 137959 transitions. Word has length 41 [2021-06-12 20:59:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:58,662 INFO L482 AbstractCegarLoop]: Abstraction has 31018 states and 137959 transitions. [2021-06-12 20:59:58,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 31018 states and 137959 transitions. [2021-06-12 20:59:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:59:58,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:58,726 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:58,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:58,929 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:58,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1350520954, now seen corresponding path program 21 times [2021-06-12 20:59:58,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:58,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809138833] [2021-06-12 20:59:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 20:59:59,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:59,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809138833] [2021-06-12 20:59:59,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809138833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:59,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731843505] [2021-06-12 20:59:59,039 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:59,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:59:59,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:59,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:59:59,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-12 20:59:59,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:59,311 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-12 20:59:59,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:59,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:59,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-06-12 20:59:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:59:59,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-06-12 20:59:59,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:59,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:59,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:59,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:14 [2021-06-12 20:59:59,443 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-06-12 20:59:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-06-12 20:59:59,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:59:59,473 INFO L628 ElimStorePlain]: treesize reduction 15, result has 67.4 percent of original size [2021-06-12 20:59:59,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:59,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2021-06-12 20:59:59,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:59,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 20:59:59,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:59:59,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:59,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 20:59:59,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:59:59,691 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:59:59,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:59:59,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:59,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 20:59:59,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:59:59,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:59,723 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-12 20:59:59,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:59:59,724 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-12 20:59:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731843505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:59,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:59,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-12 20:59:59,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856722236] [2021-06-12 20:59:59,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:59:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:59:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:59:59,869 INFO L87 Difference]: Start difference. First operand 31018 states and 137959 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:00,460 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-06-12 21:00:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:01,366 INFO L93 Difference]: Finished difference Result 89629 states and 388893 transitions. [2021-06-12 21:00:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:00:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 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 41 [2021-06-12 21:00:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:01,459 INFO L225 Difference]: With dead ends: 89629 [2021-06-12 21:00:01,459 INFO L226 Difference]: Without dead ends: 24194 [2021-06-12 21:00:01,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 834.6ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:00:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24194 states. [2021-06-12 21:00:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24194 to 24194. [2021-06-12 21:00:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24194 states, 24193 states have (on average 4.4164014384326045) internal successors, (106846), 24193 states have internal predecessors, (106846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24194 states to 24194 states and 106846 transitions. [2021-06-12 21:00:02,134 INFO L78 Accepts]: Start accepts. Automaton has 24194 states and 106846 transitions. Word has length 41 [2021-06-12 21:00:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:02,134 INFO L482 AbstractCegarLoop]: Abstraction has 24194 states and 106846 transitions. [2021-06-12 21:00:02,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24194 states and 106846 transitions. [2021-06-12 21:00:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:00:02,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:02,183 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:02,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:02,384 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash 579617674, now seen corresponding path program 22 times [2021-06-12 21:00:02,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:02,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375463988] [2021-06-12 21:00:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:00:02,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:02,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375463988] [2021-06-12 21:00:02,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375463988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:02,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285565145] [2021-06-12 21:00:02,454 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:02,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:00:02,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:00:02,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 21:00:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285565145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:02,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:02,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 21:00:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402585233] [2021-06-12 21:00:02,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:00:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:00:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:00:02,809 INFO L87 Difference]: Start difference. First operand 24194 states and 106846 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:03,091 INFO L93 Difference]: Finished difference Result 31728 states and 133271 transitions. [2021-06-12 21:00:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:00:03,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 43 [2021-06-12 21:00:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:03,186 INFO L225 Difference]: With dead ends: 31728 [2021-06-12 21:00:03,186 INFO L226 Difference]: Without dead ends: 31708 [2021-06-12 21:00:03,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:00:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31708 states. [2021-06-12 21:00:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31708 to 20545. [2021-06-12 21:00:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338492990654205) internal successors, (89130), 20544 states have internal predecessors, (89130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89130 transitions. [2021-06-12 21:00:03,981 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89130 transitions. Word has length 43 [2021-06-12 21:00:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:03,981 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89130 transitions. [2021-06-12 21:00:03,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89130 transitions. [2021-06-12 21:00:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:00:04,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:04,027 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:04,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 21:00:04,227 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:04,228 INFO L82 PathProgramCache]: Analyzing trace with hash 856538626, now seen corresponding path program 23 times [2021-06-12 21:00:04,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:04,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367022455] [2021-06-12 21:00:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 21:00:04,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:04,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367022455] [2021-06-12 21:00:04,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367022455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:04,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102792400] [2021-06-12 21:00:04,263 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:04,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:00:04,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:00:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-12 21:00:04,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102792400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:04,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:04,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 21:00:04,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233180111] [2021-06-12 21:00:04,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:00:04,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:00:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:00:04,380 INFO L87 Difference]: Start difference. First operand 20545 states and 89130 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:04,619 INFO L93 Difference]: Finished difference Result 25792 states and 107062 transitions. [2021-06-12 21:00:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:00:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:00:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:04,699 INFO L225 Difference]: With dead ends: 25792 [2021-06-12 21:00:04,699 INFO L226 Difference]: Without dead ends: 25788 [2021-06-12 21:00:04,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:00:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2021-06-12 21:00:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 20545. [2021-06-12 21:00:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338395638629284) internal successors, (89128), 20544 states have internal predecessors, (89128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89128 transitions. [2021-06-12 21:00:05,471 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89128 transitions. Word has length 43 [2021-06-12 21:00:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:05,471 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89128 transitions. [2021-06-12 21:00:05,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89128 transitions. [2021-06-12 21:00:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:00:05,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:05,522 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:05,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-12 21:00:05,724 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:05,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1826733498, now seen corresponding path program 24 times [2021-06-12 21:00:05,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:05,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863219790] [2021-06-12 21:00:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:00:05,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:05,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863219790] [2021-06-12 21:00:05,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863219790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:05,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604465833] [2021-06-12 21:00:05,767 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:05,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:00:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:00:05,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:00:05,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604465833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:05,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:05,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 21:00:05,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16867801] [2021-06-12 21:00:05,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:00:05,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:05,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:00:05,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:00:05,877 INFO L87 Difference]: Start difference. First operand 20545 states and 89128 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:06,157 INFO L93 Difference]: Finished difference Result 29923 states and 123633 transitions. [2021-06-12 21:00:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:00:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 43 [2021-06-12 21:00:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:06,256 INFO L225 Difference]: With dead ends: 29923 [2021-06-12 21:00:06,256 INFO L226 Difference]: Without dead ends: 29911 [2021-06-12 21:00:06,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:00:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29911 states. [2021-06-12 21:00:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29911 to 22182. [2021-06-12 21:00:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22182 states, 22181 states have (on average 4.363960146070962) internal successors, (96797), 22181 states have internal predecessors, (96797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22182 states to 22182 states and 96797 transitions. [2021-06-12 21:00:07,113 INFO L78 Accepts]: Start accepts. Automaton has 22182 states and 96797 transitions. Word has length 43 [2021-06-12 21:00:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:07,113 INFO L482 AbstractCegarLoop]: Abstraction has 22182 states and 96797 transitions. [2021-06-12 21:00:07,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 22182 states and 96797 transitions. [2021-06-12 21:00:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:00:07,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:07,162 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:07,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 21:00:07,363 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:07,363 INFO L82 PathProgramCache]: Analyzing trace with hash 733833666, now seen corresponding path program 25 times [2021-06-12 21:00:07,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:07,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520479580] [2021-06-12 21:00:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:00:07,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:07,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520479580] [2021-06-12 21:00:07,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520479580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:07,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608655780] [2021-06-12 21:00:07,411 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:00:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 21:00:07,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608655780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:07,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:07,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 21:00:07,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073357179] [2021-06-12 21:00:07,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:00:07,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:00:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:00:07,527 INFO L87 Difference]: Start difference. First operand 22182 states and 96797 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:07,818 INFO L93 Difference]: Finished difference Result 34390 states and 141751 transitions. [2021-06-12 21:00:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:00:07,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:00:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:08,111 INFO L225 Difference]: With dead ends: 34390 [2021-06-12 21:00:08,111 INFO L226 Difference]: Without dead ends: 34390 [2021-06-12 21:00:08,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:00:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34390 states. [2021-06-12 21:00:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34390 to 22406. [2021-06-12 21:00:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22406 states, 22405 states have (on average 4.360365989734435) internal successors, (97694), 22405 states have internal predecessors, (97694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22406 states to 22406 states and 97694 transitions. [2021-06-12 21:00:08,773 INFO L78 Accepts]: Start accepts. Automaton has 22406 states and 97694 transitions. Word has length 43 [2021-06-12 21:00:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:08,773 INFO L482 AbstractCegarLoop]: Abstraction has 22406 states and 97694 transitions. [2021-06-12 21:00:08,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:08,773 INFO L276 IsEmpty]: Start isEmpty. Operand 22406 states and 97694 transitions. [2021-06-12 21:00:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:00:08,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:08,820 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:09,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:09,021 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:09,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1750646786, now seen corresponding path program 26 times [2021-06-12 21:00:09,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:09,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633877634] [2021-06-12 21:00:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:00:09,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:09,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633877634] [2021-06-12 21:00:09,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633877634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:09,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343083024] [2021-06-12 21:00:09,061 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:09,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:00:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:00:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:00:09,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343083024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:09,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:09,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 21:00:09,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501656643] [2021-06-12 21:00:09,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:00:09,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:00:09,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:00:09,162 INFO L87 Difference]: Start difference. First operand 22406 states and 97694 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:09,866 INFO L93 Difference]: Finished difference Result 38562 states and 161998 transitions. [2021-06-12 21:00:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:00:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:00:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:10,000 INFO L225 Difference]: With dead ends: 38562 [2021-06-12 21:00:10,000 INFO L226 Difference]: Without dead ends: 38558 [2021-06-12 21:00:10,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:00:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38558 states. [2021-06-12 21:00:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38558 to 29258. [2021-06-12 21:00:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29258 states, 29257 states have (on average 4.442629114399972) internal successors, (129978), 29257 states have internal predecessors, (129978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29258 states to 29258 states and 129978 transitions. [2021-06-12 21:00:10,908 INFO L78 Accepts]: Start accepts. Automaton has 29258 states and 129978 transitions. Word has length 43 [2021-06-12 21:00:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:10,909 INFO L482 AbstractCegarLoop]: Abstraction has 29258 states and 129978 transitions. [2021-06-12 21:00:10,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 29258 states and 129978 transitions. [2021-06-12 21:00:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:00:10,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:10,977 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:11,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:11,178 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1098153854, now seen corresponding path program 27 times [2021-06-12 21:00:11,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:11,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533904667] [2021-06-12 21:00:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 21:00:11,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:11,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533904667] [2021-06-12 21:00:11,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533904667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:11,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075396444] [2021-06-12 21:00:11,225 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:11,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:00:11,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:00:11,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:00:11,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075396444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:11,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:11,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-06-12 21:00:11,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428588469] [2021-06-12 21:00:11,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:00:11,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:00:11,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:00:11,419 INFO L87 Difference]: Start difference. First operand 29258 states and 129978 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:13,469 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 21:00:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:14,837 INFO L93 Difference]: Finished difference Result 130071 states and 514816 transitions. [2021-06-12 21:00:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-12 21:00:14,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 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 43 [2021-06-12 21:00:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:15,327 INFO L225 Difference]: With dead ends: 130071 [2021-06-12 21:00:15,327 INFO L226 Difference]: Without dead ends: 127719 [2021-06-12 21:00:15,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6115 ImplicationChecksByTransitivity, 2013.2ms TimeCoverageRelationStatistics Valid=3011, Invalid=10795, Unknown=0, NotChecked=0, Total=13806 [2021-06-12 21:00:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127719 states. [2021-06-12 21:00:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127719 to 39730. [2021-06-12 21:00:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39730 states, 39729 states have (on average 4.411387147927207) internal successors, (175260), 39729 states have internal predecessors, (175260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39730 states to 39730 states and 175260 transitions. [2021-06-12 21:00:18,090 INFO L78 Accepts]: Start accepts. Automaton has 39730 states and 175260 transitions. Word has length 43 [2021-06-12 21:00:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:18,091 INFO L482 AbstractCegarLoop]: Abstraction has 39730 states and 175260 transitions. [2021-06-12 21:00:18,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 39730 states and 175260 transitions. [2021-06-12 21:00:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:00:18,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:18,181 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:18,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:18,382 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1617681380, now seen corresponding path program 28 times [2021-06-12 21:00:18,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:18,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551433266] [2021-06-12 21:00:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 21:00:18,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:18,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551433266] [2021-06-12 21:00:18,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551433266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:18,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950793692] [2021-06-12 21:00:18,427 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:18,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:00:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:18,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:00:18,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 21:00:18,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950793692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:18,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:18,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 21:00:18,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001478030] [2021-06-12 21:00:18,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:00:18,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:00:18,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:00:18,542 INFO L87 Difference]: Start difference. First operand 39730 states and 175260 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:19,392 INFO L93 Difference]: Finished difference Result 67789 states and 281482 transitions. [2021-06-12 21:00:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:00:19,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 45 [2021-06-12 21:00:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:19,642 INFO L225 Difference]: With dead ends: 67789 [2021-06-12 21:00:19,642 INFO L226 Difference]: Without dead ends: 67789 [2021-06-12 21:00:19,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:00:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67789 states. [2021-06-12 21:00:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67789 to 42904. [2021-06-12 21:00:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42904 states, 42903 states have (on average 4.394098314803161) internal successors, (188520), 42903 states have internal predecessors, (188520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42904 states to 42904 states and 188520 transitions. [2021-06-12 21:00:21,104 INFO L78 Accepts]: Start accepts. Automaton has 42904 states and 188520 transitions. Word has length 45 [2021-06-12 21:00:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:21,104 INFO L482 AbstractCegarLoop]: Abstraction has 42904 states and 188520 transitions. [2021-06-12 21:00:21,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 42904 states and 188520 transitions. [2021-06-12 21:00:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:00:21,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:21,198 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:21,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:21,399 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1352044384, now seen corresponding path program 29 times [2021-06-12 21:00:21,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:21,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44200456] [2021-06-12 21:00:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-12 21:00:21,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:21,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44200456] [2021-06-12 21:00:21,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44200456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:21,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483096944] [2021-06-12 21:00:21,473 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:21,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:00:21,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:00:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:00:21,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483096944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:21,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:21,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-12 21:00:21,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577740815] [2021-06-12 21:00:21,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:00:21,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:21,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:00:21,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:00:21,911 INFO L87 Difference]: Start difference. First operand 42904 states and 188520 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:24,203 INFO L93 Difference]: Finished difference Result 115466 states and 489083 transitions. [2021-06-12 21:00:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 21:00:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 21:00:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:24,675 INFO L225 Difference]: With dead ends: 115466 [2021-06-12 21:00:24,675 INFO L226 Difference]: Without dead ends: 113950 [2021-06-12 21:00:24,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 863.9ms TimeCoverageRelationStatistics Valid=1536, Invalid=5604, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 21:00:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113950 states. [2021-06-12 21:00:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113950 to 40933. [2021-06-12 21:00:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 4.4053796540603924) internal successors, (180321), 40932 states have internal predecessors, (180321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 180321 transitions. [2021-06-12 21:00:26,464 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 180321 transitions. Word has length 45 [2021-06-12 21:00:26,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:26,464 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 180321 transitions. [2021-06-12 21:00:26,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 180321 transitions. [2021-06-12 21:00:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:00:26,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:26,863 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:27,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-12 21:00:27,064 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1091018938, now seen corresponding path program 30 times [2021-06-12 21:00:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562428726] [2021-06-12 21:00:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 21:00:27,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:27,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562428726] [2021-06-12 21:00:27,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562428726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:27,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830617396] [2021-06-12 21:00:27,121 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:27,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:00:27,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:00:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:27,303 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 10 treesize of output 7 [2021-06-12 21:00:27,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:27,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:00:27,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:00:27,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-12 21:00:27,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:00:27,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 21:00:27,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:00:27,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:00:27,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:00:27,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-06-12 21:00:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 21:00:27,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830617396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:27,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:27,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-12 21:00:27,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262774650] [2021-06-12 21:00:27,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:00:27,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:00:27,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:00:27,516 INFO L87 Difference]: Start difference. First operand 40933 states and 180321 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:30,493 INFO L93 Difference]: Finished difference Result 77213 states and 327298 transitions. [2021-06-12 21:00:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 21:00:30,494 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 21:00:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:30,967 INFO L225 Difference]: With dead ends: 77213 [2021-06-12 21:00:30,967 INFO L226 Difference]: Without dead ends: 76984 [2021-06-12 21:00:30,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1806.4ms TimeCoverageRelationStatistics Valid=1363, Invalid=5117, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 21:00:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76984 states. [2021-06-12 21:00:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76984 to 44638. [2021-06-12 21:00:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44638 states, 44637 states have (on average 4.39812263368954) internal successors, (196319), 44637 states have internal predecessors, (196319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44638 states to 44638 states and 196319 transitions. [2021-06-12 21:00:32,818 INFO L78 Accepts]: Start accepts. Automaton has 44638 states and 196319 transitions. Word has length 45 [2021-06-12 21:00:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:32,818 INFO L482 AbstractCegarLoop]: Abstraction has 44638 states and 196319 transitions. [2021-06-12 21:00:32,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 44638 states and 196319 transitions. [2021-06-12 21:00:32,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:00:32,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:32,928 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:33,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:33,128 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:33,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:33,129 INFO L82 PathProgramCache]: Analyzing trace with hash -218983474, now seen corresponding path program 31 times [2021-06-12 21:00:33,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:33,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696583795] [2021-06-12 21:00:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 21:00:33,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696583795] [2021-06-12 21:00:33,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696583795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241350001] [2021-06-12 21:00:33,405 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 21:00:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 21:00:33,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:33,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 21:00:33,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:33,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:00:33,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:00:33,707 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-06-12 21:00:33,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-06-12 21:00:33,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:33,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-06-12 21:00:33,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:33,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:00:33,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:00:33,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:45 [2021-06-12 21:00:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-06-12 21:00:33,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:33,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:00:33,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-06-12 21:00:33,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:33,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:00:33,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:00:33,893 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-06-12 21:00:34,266 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-06-12 21:00:34,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:00:34,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 31 [2021-06-12 21:00:34,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:00:34,454 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:00:34,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 15 [2021-06-12 21:00:34,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:00:34,469 INFO L628 ElimStorePlain]: treesize reduction 70, result has 6.7 percent of original size [2021-06-12 21:00:34,469 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-06-12 21:00:34,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:00:34,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-06-12 21:00:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:00:34,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241350001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:34,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:34,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-06-12 21:00:34,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561595272] [2021-06-12 21:00:34,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:00:34,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:34,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:00:34,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:00:34,492 INFO L87 Difference]: Start difference. First operand 44638 states and 196319 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:35,820 INFO L93 Difference]: Finished difference Result 57374 states and 249695 transitions. [2021-06-12 21:00:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:00:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 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 47 [2021-06-12 21:00:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:35,821 INFO L225 Difference]: With dead ends: 57374 [2021-06-12 21:00:35,821 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 21:00:35,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1004.1ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:00:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 21:00:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 21:00:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 21:00:35,822 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-06-12 21:00:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:35,822 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 21:00:35,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 21:00:35,822 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 21:00:36,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 21:00:36,024 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:00:36,026 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:00:36 BasicIcfg [2021-06-12 21:00:36,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:00:36,027 INFO L168 Benchmark]: Toolchain (without parser) took 71147.27 ms. Allocated memory was 183.5 MB in the beginning and 7.7 GB in the end (delta: 7.5 GB). Free memory was 162.7 MB in the beginning and 6.9 GB in the end (delta: -6.7 GB). Peak memory consumption was 784.9 MB. Max. memory is 8.0 GB. [2021-06-12 21:00:36,027 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 183.5 MB. Free memory is still 164.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:00:36,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.10 ms. Allocated memory is still 183.5 MB. Free memory was 162.7 MB in the beginning and 161.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:00:36,027 INFO L168 Benchmark]: Boogie Preprocessor took 30.99 ms. Allocated memory is still 183.5 MB. Free memory was 161.2 MB in the beginning and 160.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:00:36,027 INFO L168 Benchmark]: RCFGBuilder took 339.69 ms. Allocated memory is still 183.5 MB. Free memory was 160.2 MB in the beginning and 146.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 21:00:36,027 INFO L168 Benchmark]: TraceAbstraction took 70741.39 ms. Allocated memory was 183.5 MB in the beginning and 7.7 GB in the end (delta: 7.5 GB). Free memory was 145.9 MB in the beginning and 6.9 GB in the end (delta: -6.7 GB). Peak memory consumption was 768.1 MB. Max. memory is 8.0 GB. [2021-06-12 21:00:36,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 183.5 MB. Free memory is still 164.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 30.10 ms. Allocated memory is still 183.5 MB. Free memory was 162.7 MB in the beginning and 161.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.99 ms. Allocated memory is still 183.5 MB. Free memory was 161.2 MB in the beginning and 160.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 339.69 ms. Allocated memory is still 183.5 MB. Free memory was 160.2 MB in the beginning and 146.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 70741.39 ms. Allocated memory was 183.5 MB in the beginning and 7.7 GB in the end (delta: 7.5 GB). Free memory was 145.9 MB in the beginning and 6.9 GB in the end (delta: -6.7 GB). Peak memory consumption was 768.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 70646.5ms, OverallIterations: 41, TraceHistogramMax: 4, EmptinessCheckTime: 1621.3ms, AutomataDifference: 30612.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 82.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2342 SDtfs, 11433 SDslu, 14213 SDs, 0 SdLazy, 12523 SolverSat, 1778 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6809.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2258 GetRequests, 1229 SyntacticMatches, 29 SemanticMatches, 1000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18809 ImplicationChecksByTransitivity, 13795.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44638occurred in iteration=40, InterpolantAutomatonStates: 957, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18578.4ms AutomataMinimizationTime, 41 MinimizatonAttempts, 355813 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 496.5ms SsaConstructionTime, 856.3ms SatisfiabilityAnalysisTime, 9913.7ms InterpolantComputationTime, 2703 NumberOfCodeBlocks, 2696 NumberOfCodeBlocksAsserted, 135 NumberOfCheckSat, 2628 ConstructedInterpolants, 4 QuantifiedInterpolants, 13598 SizeOfPredicates, 80 NumberOfNonLiveVariables, 3451 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 75 InterpolantComputations, 7 PerfectInterpolantSequences, 778/1413 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...