/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:51:46,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:51:46,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:51:46,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 19:51:46,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 19:51:46,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 19:51:46,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 19:51:46,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 19:51:46,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 19:51:46,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 19:51:46,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 19:51:46,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 19:51:46,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 19:51:46,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 19:51:46,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 19:51:46,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 19:51:46,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 19:51:46,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 19:51:46,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 19:51:46,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 19:51:46,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 19:51:46,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 19:51:46,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 19:51:46,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 19:51:46,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 19:51:46,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 19:51:46,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 19:51:46,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 19:51:46,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 19:51:46,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 19:51:46,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 19:51:46,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 19:51:46,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 19:51:46,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 19:51:46,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 19:51:46,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 19:51:46,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 19:51:46,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 19:51:46,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 19:51:46,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 19:51:46,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 19:51:46,955 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 [2021-07-13 19:51:46,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:51:46,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:51:46,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:51:46,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:51:46,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:51:46,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:51:46,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:51:46,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:51:46,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:51:46,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:51:46,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:51:46,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:51:46,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:51:46,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:51:46,983 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:51:46,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:51:46,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:51:47,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:51:47,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:51:47,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:51:47,243 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:51:47,244 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:51:47,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl [2021-07-13 19:51:47,248 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl' [2021-07-13 19:51:47,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:51:47,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:51:47,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:51:47,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:51:47,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:51:47,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:51:47,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:51:47,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:51:47,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:51:47,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/1) ... [2021-07-13 19:51:47,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:51:47,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:51:47,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:51:47,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:51:47,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (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 [2021-07-13 19:51:47,391 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:51:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:51:47,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:51:47,392 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:51:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:51:47,392 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:51:47,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:51:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:51:47,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:51:47,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:51:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:51:47,394 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:51:47,395 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:51:47,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:51:47,577 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:51:47,578 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:51:47 BoogieIcfgContainer [2021-07-13 19:51:47,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:51:47,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:51:47,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:51:47,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:51:47,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:47" (1/2) ... [2021-07-13 19:51:47,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453f686c and model type misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:51:47, skipping insertion in model container [2021-07-13 19:51:47,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:51:47" (2/2) ... [2021-07-13 19:51:47,583 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-4.wvr.bpl [2021-07-13 19:51:47,587 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:51:47,587 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:51:47,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:51:47,587 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:51:47,642 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 19:51:47,656 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 19:51:47,685 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:51:47,685 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:51:47,685 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:51:47,685 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:51:47,685 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:51:47,685 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:51:47,685 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:51:47,685 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:51:47,708 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 31 transitions, 86 flow [2021-07-13 19:51:47,753 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:51:47,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:47,767 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:47,768 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash -155015942, now seen corresponding path program 1 times [2021-07-13 19:51:47,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:47,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584185403] [2021-07-13 19:51:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:47,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:47,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584185403] [2021-07-13 19:51:47,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584185403] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:47,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:47,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:51:47,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235789032] [2021-07-13 19:51:47,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:51:47,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:51:47,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:47,898 INFO L87 Difference]: Start difference. First operand has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:47,932 INFO L93 Difference]: Finished difference Result 273 states and 758 transitions. [2021-07-13 19:51:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:51:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-07-13 19:51:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:47,942 INFO L225 Difference]: With dead ends: 273 [2021-07-13 19:51:47,942 INFO L226 Difference]: Without dead ends: 173 [2021-07-13 19:51:47,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-13 19:51:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-07-13 19:51:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.7209302325581395) internal successors, (468), 172 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 468 transitions. [2021-07-13 19:51:47,976 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 468 transitions. Word has length 14 [2021-07-13 19:51:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:47,976 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 468 transitions. [2021-07-13 19:51:47,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 468 transitions. [2021-07-13 19:51:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:51:47,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:47,978 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:47,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:51:47,978 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash 126261564, now seen corresponding path program 2 times [2021-07-13 19:51:47,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:47,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249705524] [2021-07-13 19:51:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:47,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:48,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249705524] [2021-07-13 19:51:48,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249705524] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:48,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:48,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:51:48,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368504071] [2021-07-13 19:51:48,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:48,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:48,002 INFO L87 Difference]: Start difference. First operand 173 states and 468 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:48,038 INFO L93 Difference]: Finished difference Result 310 states and 842 transitions. [2021-07-13 19:51:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:51:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-07-13 19:51:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:48,040 INFO L225 Difference]: With dead ends: 310 [2021-07-13 19:51:48,040 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:51:48,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:51:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-07-13 19:51:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2021-07-13 19:51:48,054 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 14 [2021-07-13 19:51:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:48,055 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2021-07-13 19:51:48,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2021-07-13 19:51:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:51:48,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:48,056 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:48,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:51:48,057 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash 253936222, now seen corresponding path program 1 times [2021-07-13 19:51:48,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:48,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660845348] [2021-07-13 19:51:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:48,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660845348] [2021-07-13 19:51:48,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660845348] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:48,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:48,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:51:48,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109527701] [2021-07-13 19:51:48,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:51:48,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:48,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:51:48,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:48,072 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:48,081 INFO L93 Difference]: Finished difference Result 369 states and 981 transitions. [2021-07-13 19:51:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:51:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-07-13 19:51:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:48,083 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:51:48,083 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:51:48,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:51:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 284. [2021-07-13 19:51:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7597173144876326) internal successors, (781), 283 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 781 transitions. [2021-07-13 19:51:48,105 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 781 transitions. Word has length 18 [2021-07-13 19:51:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:48,106 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 781 transitions. [2021-07-13 19:51:48,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 781 transitions. [2021-07-13 19:51:48,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:51:48,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:48,113 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:48,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:51:48,113 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:48,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1748425536, now seen corresponding path program 1 times [2021-07-13 19:51:48,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:48,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386315370] [2021-07-13 19:51:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:48,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386315370] [2021-07-13 19:51:48,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386315370] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:48,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:48,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:51:48,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121408183] [2021-07-13 19:51:48,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:51:48,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:48,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:51:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:48,145 INFO L87 Difference]: Start difference. First operand 284 states and 781 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:48,162 INFO L93 Difference]: Finished difference Result 432 states and 1157 transitions. [2021-07-13 19:51:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:51:48,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-07-13 19:51:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:48,167 INFO L225 Difference]: With dead ends: 432 [2021-07-13 19:51:48,167 INFO L226 Difference]: Without dead ends: 432 [2021-07-13 19:51:48,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-13 19:51:48,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 348. [2021-07-13 19:51:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.7636887608069163) internal successors, (959), 347 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 959 transitions. [2021-07-13 19:51:48,199 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 959 transitions. Word has length 18 [2021-07-13 19:51:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:48,199 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 959 transitions. [2021-07-13 19:51:48,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 959 transitions. [2021-07-13 19:51:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:48,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:48,200 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:48,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:51:48,200 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1245940290, now seen corresponding path program 1 times [2021-07-13 19:51:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573104594] [2021-07-13 19:51:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:48,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573104594] [2021-07-13 19:51:48,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573104594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804995099] [2021-07-13 19:51:48,264 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 [2021-07-13 19:51:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:51:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804995099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:48,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:48,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:48,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881031455] [2021-07-13 19:51:48,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:48,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:48,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:48,459 INFO L87 Difference]: Start difference. First operand 348 states and 959 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:48,519 INFO L93 Difference]: Finished difference Result 665 states and 1852 transitions. [2021-07-13 19:51:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:48,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-07-13 19:51:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:48,522 INFO L225 Difference]: With dead ends: 665 [2021-07-13 19:51:48,522 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 19:51:48,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 19:51:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 408. [2021-07-13 19:51:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7764127764127764) internal successors, (1130), 407 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1130 transitions. [2021-07-13 19:51:48,540 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1130 transitions. Word has length 22 [2021-07-13 19:51:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:48,540 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1130 transitions. [2021-07-13 19:51:48,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1130 transitions. [2021-07-13 19:51:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:51:48,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:48,542 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:48,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:48,762 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1294560668, now seen corresponding path program 1 times [2021-07-13 19:51:48,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:48,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392443220] [2021-07-13 19:51:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:48,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392443220] [2021-07-13 19:51:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392443220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:48,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603128990] [2021-07-13 19:51:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:51:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603128990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:48,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:48,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:48,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870521974] [2021-07-13 19:51:48,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:48,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:48,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:48,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:48,881 INFO L87 Difference]: Start difference. First operand 408 states and 1130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:48,920 INFO L93 Difference]: Finished difference Result 873 states and 2457 transitions. [2021-07-13 19:51:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-07-13 19:51:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:48,924 INFO L225 Difference]: With dead ends: 873 [2021-07-13 19:51:48,924 INFO L226 Difference]: Without dead ends: 717 [2021-07-13 19:51:48,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-13 19:51:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 697. [2021-07-13 19:51:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8117816091954024) internal successors, (1957), 696 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1957 transitions. [2021-07-13 19:51:48,939 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1957 transitions. Word has length 22 [2021-07-13 19:51:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:48,940 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1957 transitions. [2021-07-13 19:51:48,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1957 transitions. [2021-07-13 19:51:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:48,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:48,941 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:49,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,160 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1519255610, now seen corresponding path program 2 times [2021-07-13 19:51:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551907104] [2021-07-13 19:51:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:49,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551907104] [2021-07-13 19:51:49,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551907104] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:49,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:49,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:51:49,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857723157] [2021-07-13 19:51:49,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:49,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:49,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:49,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:49,197 INFO L87 Difference]: Start difference. First operand 697 states and 1957 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-07-13 19:51:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:49,211 INFO L93 Difference]: Finished difference Result 873 states and 2302 transitions. [2021-07-13 19:51:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:51:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 26 [2021-07-13 19:51:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:49,215 INFO L225 Difference]: With dead ends: 873 [2021-07-13 19:51:49,215 INFO L226 Difference]: Without dead ends: 873 [2021-07-13 19:51:49,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-07-13 19:51:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 671. [2021-07-13 19:51:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.662686567164179) internal successors, (1784), 670 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1784 transitions. [2021-07-13 19:51:49,230 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1784 transitions. Word has length 26 [2021-07-13 19:51:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:49,230 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1784 transitions. [2021-07-13 19:51:49,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-07-13 19:51:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1784 transitions. [2021-07-13 19:51:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:49,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:49,232 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:49,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:51:49,232 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1163376152, now seen corresponding path program 2 times [2021-07-13 19:51:49,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199163126] [2021-07-13 19:51:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:49,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199163126] [2021-07-13 19:51:49,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199163126] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:49,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:49,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:51:49,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934184352] [2021-07-13 19:51:49,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:49,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:49,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:49,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:49,284 INFO L87 Difference]: Start difference. First operand 671 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-07-13 19:51:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:49,296 INFO L93 Difference]: Finished difference Result 803 states and 1991 transitions. [2021-07-13 19:51:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:51:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 26 [2021-07-13 19:51:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:49,299 INFO L225 Difference]: With dead ends: 803 [2021-07-13 19:51:49,299 INFO L226 Difference]: Without dead ends: 803 [2021-07-13 19:51:49,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-07-13 19:51:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 679. [2021-07-13 19:51:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.5250737463126844) internal successors, (1712), 678 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1712 transitions. [2021-07-13 19:51:49,312 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1712 transitions. Word has length 26 [2021-07-13 19:51:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:49,313 INFO L482 AbstractCegarLoop]: Abstraction has 679 states and 1712 transitions. [2021-07-13 19:51:49,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-07-13 19:51:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1712 transitions. [2021-07-13 19:51:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:51:49,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:49,314 INFO L508 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] [2021-07-13 19:51:49,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:51:49,314 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2034206836, now seen corresponding path program 1 times [2021-07-13 19:51:49,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175742723] [2021-07-13 19:51:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175742723] [2021-07-13 19:51:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175742723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918324955] [2021-07-13 19:51:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:51:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918324955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:49,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:49,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84230435] [2021-07-13 19:51:49,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:49,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:49,474 INFO L87 Difference]: Start difference. First operand 679 states and 1712 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:49,528 INFO L93 Difference]: Finished difference Result 1111 states and 2808 transitions. [2021-07-13 19:51:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:51:49,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:51:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:49,534 INFO L225 Difference]: With dead ends: 1111 [2021-07-13 19:51:49,534 INFO L226 Difference]: Without dead ends: 935 [2021-07-13 19:51:49,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-07-13 19:51:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 478. [2021-07-13 19:51:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.542976939203354) internal successors, (1213), 477 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1213 transitions. [2021-07-13 19:51:49,563 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1213 transitions. Word has length 30 [2021-07-13 19:51:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:49,563 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1213 transitions. [2021-07-13 19:51:49,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1213 transitions. [2021-07-13 19:51:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:51:49,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:49,566 INFO L508 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] [2021-07-13 19:51:49,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,781 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash 794142476, now seen corresponding path program 2 times [2021-07-13 19:51:49,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719628289] [2021-07-13 19:51:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719628289] [2021-07-13 19:51:49,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719628289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068392584] [2021-07-13 19:51:49,816 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 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 [2021-07-13 19:51:49,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:51:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068392584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:49,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642043600] [2021-07-13 19:51:49,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:49,910 INFO L87 Difference]: Start difference. First operand 478 states and 1213 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:49,963 INFO L93 Difference]: Finished difference Result 458 states and 1138 transitions. [2021-07-13 19:51:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:51:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:51:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:49,964 INFO L225 Difference]: With dead ends: 458 [2021-07-13 19:51:49,964 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 19:51:49,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 19:51:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 19:51:49,964 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) [2021-07-13 19:51:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 19:51:49,965 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-07-13 19:51:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:49,965 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 19:51:49,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 19:51:49,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:51:50,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:50,189 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:51:50,191 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:51:50 BasicIcfg [2021-07-13 19:51:50,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:51:50,191 INFO L168 Benchmark]: Toolchain (without parser) took 2912.73 ms. Allocated memory was 244.3 MB in the beginning and 293.6 MB in the end (delta: 49.3 MB). Free memory was 222.9 MB in the beginning and 233.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 39.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:50,192 INFO L168 Benchmark]: Boogie PL CUP Parser took 3.08 ms. Allocated memory is still 244.3 MB. Free memory is still 223.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:51:50,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.05 ms. Allocated memory is still 244.3 MB. Free memory was 222.7 MB in the beginning and 221.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:50,192 INFO L168 Benchmark]: Boogie Preprocessor took 9.63 ms. Allocated memory is still 244.3 MB. Free memory was 221.3 MB in the beginning and 220.4 MB in the end (delta: 909.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:50,192 INFO L168 Benchmark]: RCFGBuilder took 257.20 ms. Allocated memory is still 244.3 MB. Free memory was 220.2 MB in the beginning and 209.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:50,192 INFO L168 Benchmark]: TraceAbstraction took 2611.17 ms. Allocated memory was 244.3 MB in the beginning and 293.6 MB in the end (delta: 49.3 MB). Free memory was 209.1 MB in the beginning and 233.6 MB in the end (delta: -24.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:50,192 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 3.08 ms. Allocated memory is still 244.3 MB. Free memory is still 223.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.05 ms. Allocated memory is still 244.3 MB. Free memory was 222.7 MB in the beginning and 221.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.63 ms. Allocated memory is still 244.3 MB. Free memory was 221.3 MB in the beginning and 220.4 MB in the end (delta: 909.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 257.20 ms. Allocated memory is still 244.3 MB. Free memory was 220.2 MB in the beginning and 209.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2611.17 ms. Allocated memory was 244.3 MB in the beginning and 293.6 MB in the end (delta: 49.3 MB). Free memory was 209.1 MB in the beginning and 233.6 MB in the end (delta: -24.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 62]: 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 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2504.6ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 29.8ms, AutomataDifference: 391.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 282 SDtfs, 341 SDslu, 351 SDs, 0 SdLazy, 182 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 147.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=697occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 179.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 1073 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.9ms SsaConstructionTime, 126.1ms SatisfiabilityAnalysisTime, 564.1ms InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 574 SizeOfPredicates, 4 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 66/88 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...