/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:08:20,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:08:20,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:08:20,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 05:08:20,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 05:08:20,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 05:08:20,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 05:08:20,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 05:08:20,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 05:08:20,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 05:08:20,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 05:08:20,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 05:08:20,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:08:20,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:08:20,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:08:20,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:08:20,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:08:20,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:08:20,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:08:20,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:08:20,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:08:20,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:08:20,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:08:20,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:08:20,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 05:08:20,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 05:08:20,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 05:08:20,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 05:08:20,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 05:08:20,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 05:08:20,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 05:08:20,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 05:08:20,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 05:08:20,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 05:08:20,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 05:08:20,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 05:08:20,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 05:08:20,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 05:08:20,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:08:20,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:08:20,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:08:20,376 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 [2021-06-05 05:08:20,404 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:08:20,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:08:20,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:08:20,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:08:20,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:08:20,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:08:20,407 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:08:20,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:08:20,407 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:08:20,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:08:20,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:08:20,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:08:20,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:08:20,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:08:20,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:08:20,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:08:20,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:08:20,647 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:08:20,648 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:08:20,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3.wvr.bpl [2021-06-05 05:08:20,649 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3.wvr.bpl' [2021-06-05 05:08:20,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:08:20,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:08:20,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:08:20,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:08:20,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:08:20,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:08:20,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:08:20,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:08:20,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:08:20,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... [2021-06-05 05:08:20,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:08:20,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:08:20,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:08:20,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:08:20,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:08:20,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:08:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:08:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:08:20,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:08:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:08:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:08:20,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:08:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:08:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:08:20,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:08:20,971 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:08:20,971 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:08:20,972 INFO L202 PluginConnector]: Adding new model misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:08:20 BoogieIcfgContainer [2021-06-05 05:08:20,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:08:20,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:08:20,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:08:20,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:08:20,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:20" (1/2) ... [2021-06-05 05:08:20,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652ceaeb and model type misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:08:20, skipping insertion in model container [2021-06-05 05:08:20,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:08:20" (2/2) ... [2021-06-05 05:08:20,977 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3.wvr.bpl [2021-06-05 05:08:20,980 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:08:20,980 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:08:20,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:08:20,981 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:08:21,000 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:08:21,013 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:08:21,025 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:08:21,025 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:08:21,025 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:08:21,025 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:08:21,025 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:08:21,025 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:08:21,025 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:08:21,026 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:08:21,031 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 35 transitions, 86 flow [2021-06-05 05:08:21,052 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 2.548076923076923) internal successors, (265), 105 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 2.548076923076923) internal successors, (265), 105 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 05:08:21,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:21,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:21,059 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1716416352, now seen corresponding path program 1 times [2021-06-05 05:08:21,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:21,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770163951] [2021-06-05 05:08:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:21,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:21,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770163951] [2021-06-05 05:08:21,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770163951] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:21,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:21,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:08:21,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971414294] [2021-06-05 05:08:21,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:08:21,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:08:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:21,156 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 2.548076923076923) internal successors, (265), 105 states have internal predecessors, (265), 0 states have call successors, (0), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:21,185 INFO L93 Difference]: Finished difference Result 114 states and 286 transitions. [2021-06-05 05:08:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:08:21,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-06-05 05:08:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:21,193 INFO L225 Difference]: With dead ends: 114 [2021-06-05 05:08:21,193 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 05:08:21,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 05:08:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-06-05 05:08:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.5309734513274336) internal successors, (286), 113 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 286 transitions. [2021-06-05 05:08:21,224 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 286 transitions. Word has length 11 [2021-06-05 05:08:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:21,224 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 286 transitions. [2021-06-05 05:08:21,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 286 transitions. [2021-06-05 05:08:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:08:21,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:21,226 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:21,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:08:21,226 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1625753287, now seen corresponding path program 1 times [2021-06-05 05:08:21,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:21,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820034699] [2021-06-05 05:08:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:21,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:21,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820034699] [2021-06-05 05:08:21,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820034699] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:21,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:21,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:08:21,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761932700] [2021-06-05 05:08:21,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:08:21,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:21,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:08:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:21,256 INFO L87 Difference]: Start difference. First operand 114 states and 286 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:21,265 INFO L93 Difference]: Finished difference Result 125 states and 311 transitions. [2021-06-05 05:08:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:08:21,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-06-05 05:08:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:21,266 INFO L225 Difference]: With dead ends: 125 [2021-06-05 05:08:21,267 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 05:08:21,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 05:08:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-06-05 05:08:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.5080645161290325) internal successors, (311), 124 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 311 transitions. [2021-06-05 05:08:21,277 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 311 transitions. Word has length 17 [2021-06-05 05:08:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:21,277 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 311 transitions. [2021-06-05 05:08:21,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 311 transitions. [2021-06-05 05:08:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:08:21,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:21,281 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:21,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:08:21,281 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:21,282 INFO L82 PathProgramCache]: Analyzing trace with hash -601515134, now seen corresponding path program 1 times [2021-06-05 05:08:21,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:21,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937686338] [2021-06-05 05:08:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:21,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:21,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937686338] [2021-06-05 05:08:21,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937686338] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:21,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:21,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:08:21,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615555871] [2021-06-05 05:08:21,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:08:21,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:21,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:08:21,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:21,312 INFO L87 Difference]: Start difference. First operand 125 states and 311 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) [2021-06-05 05:08:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:21,341 INFO L93 Difference]: Finished difference Result 169 states and 389 transitions. [2021-06-05 05:08:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:08:21,342 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 [2021-06-05 05:08:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:21,343 INFO L225 Difference]: With dead ends: 169 [2021-06-05 05:08:21,343 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 05:08:21,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 05:08:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-06-05 05:08:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.3154761904761907) internal successors, (389), 168 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 389 transitions. [2021-06-05 05:08:21,355 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 389 transitions. Word has length 23 [2021-06-05 05:08:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:21,356 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 389 transitions. [2021-06-05 05:08:21,356 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) [2021-06-05 05:08:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 389 transitions. [2021-06-05 05:08:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:08:21,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:21,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:21,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:08:21,369 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash -443005341, now seen corresponding path program 1 times [2021-06-05 05:08:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:21,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224696356] [2021-06-05 05:08:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:21,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:21,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224696356] [2021-06-05 05:08:21,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224696356] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:21,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:21,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:08:21,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528022194] [2021-06-05 05:08:21,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:08:21,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:08:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:21,400 INFO L87 Difference]: Start difference. First operand 169 states and 389 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:21,426 INFO L93 Difference]: Finished difference Result 229 states and 483 transitions. [2021-06-05 05:08:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:08:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:08:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:21,430 INFO L225 Difference]: With dead ends: 229 [2021-06-05 05:08:21,430 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 05:08:21,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 05:08:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-06-05 05:08:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1184210526315788) internal successors, (483), 228 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 483 transitions. [2021-06-05 05:08:21,445 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 483 transitions. Word has length 28 [2021-06-05 05:08:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:21,445 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 483 transitions. [2021-06-05 05:08:21,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 483 transitions. [2021-06-05 05:08:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:08:21,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:21,447 INFO L521 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] [2021-06-05 05:08:21,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:08:21,447 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:21,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2113028016, now seen corresponding path program 1 times [2021-06-05 05:08:21,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:21,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479737280] [2021-06-05 05:08:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:21,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:21,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479737280] [2021-06-05 05:08:21,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479737280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:21,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233296758] [2021-06-05 05:08:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:21,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:08:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233296758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:21,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:21,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:08:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590311818] [2021-06-05 05:08:21,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:08:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:08:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:08:21,730 INFO L87 Difference]: Start difference. First operand 229 states and 483 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:21,753 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-06-05 05:08:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:08:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:08:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:21,754 INFO L225 Difference]: With dead ends: 227 [2021-06-05 05:08:21,754 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 05:08:21,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:08:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 05:08:21,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 05:08:21,755 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) [2021-06-05 05:08:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 05:08:21,755 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-06-05 05:08:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:21,755 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 05:08:21,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 05:08:21,755 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 05:08:21,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:21,975 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:08:21,977 INFO L202 PluginConnector]: Adding new model misc-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:08:21 BasicIcfg [2021-06-05 05:08:21,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:08:21,977 INFO L168 Benchmark]: Toolchain (without parser) took 1295.07 ms. Allocated memory is still 358.6 MB. Free memory was 337.8 MB in the beginning and 264.7 MB in the end (delta: 73.1 MB). Peak memory consumption was 75.9 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:21,978 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory was 339.0 MB in the beginning and 338.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:08:21,978 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.89 ms. Allocated memory is still 358.6 MB. Free memory was 337.8 MB in the beginning and 336.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:08:21,978 INFO L168 Benchmark]: Boogie Preprocessor took 13.04 ms. Allocated memory is still 358.6 MB. Free memory was 336.3 MB in the beginning and 335.4 MB in the end (delta: 981.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:21,978 INFO L168 Benchmark]: RCFGBuilder took 256.09 ms. Allocated memory is still 358.6 MB. Free memory was 335.3 MB in the beginning and 324.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:21,979 INFO L168 Benchmark]: TraceAbstraction took 1003.66 ms. Allocated memory is still 358.6 MB. Free memory was 323.6 MB in the beginning and 264.7 MB in the end (delta: 58.9 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:21,980 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 0.12 ms. Allocated memory is still 358.6 MB. Free memory was 339.0 MB in the beginning and 338.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.89 ms. Allocated memory is still 358.6 MB. Free memory was 337.8 MB in the beginning and 336.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.04 ms. Allocated memory is still 358.6 MB. Free memory was 336.3 MB in the beginning and 335.4 MB in the end (delta: 981.2 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 256.09 ms. Allocated memory is still 358.6 MB. Free memory was 335.3 MB in the beginning and 324.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1003.66 ms. Allocated memory is still 358.6 MB. Free memory was 323.6 MB in the beginning and 264.7 MB in the end (delta: 58.9 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 72]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 950.7ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 22.6ms, AutomataDifference: 150.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 195 SDtfs, 136 SDslu, 275 SDs, 0 SdLazy, 67 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 58.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=229occurred in iteration=4, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.4ms SsaConstructionTime, 36.3ms SatisfiabilityAnalysisTime, 317.2ms InterpolantComputationTime, 145 NumberOfCodeBlocks, 145 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 513 SizeOfPredicates, 1 NumberOfNonLiveVariables, 52 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 12/34 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...