/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:25:00,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:25:00,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:25:00,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-22 02:25:00,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-22 02:25:00,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-22 02:25:00,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-22 02:25:00,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-22 02:25:00,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-22 02:25:00,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-22 02:25:00,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-22 02:25:00,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-22 02:25:00,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-22 02:25:00,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-22 02:25:00,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-22 02:25:00,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-22 02:25:00,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-22 02:25:00,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-22 02:25:00,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-22 02:25:00,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-22 02:25:00,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-22 02:25:00,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-22 02:25:00,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-22 02:25:00,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-22 02:25:00,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-22 02:25:00,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-22 02:25:00,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-22 02:25:00,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-22 02:25:00,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-22 02:25:00,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-22 02:25:00,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-22 02:25:00,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-22 02:25:00,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-22 02:25:00,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-22 02:25:00,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-22 02:25:00,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-22 02:25:00,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-22 02:25:00,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-22 02:25:00,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:25:00,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:25:00,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:25:00,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:25:00,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:25:00,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:25:00,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:25:00,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:25:00,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:25:00,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:25:00,958 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:25:00,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:25:00,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:25:00,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:25:00,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:25:00,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:25:00,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:25:00,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:25:00,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:25:00,961 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:25:00,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:25:01,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:25:01,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:25:01,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:25:01,190 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:25:01,191 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:25:01,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2021-05-22 02:25:01,191 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2021-05-22 02:25:01,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:25:01,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:25:01,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:25:01,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:25:01,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:25:01,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:25:01,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:25:01,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:25:01,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:25:01,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/1) ... [2021-05-22 02:25:01,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:25:01,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:25:01,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:25:01,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:25:01,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (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 [2021-05-22 02:25:01,425 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:25:01,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:25:01,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:25:01,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:25:01,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:25:01,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:25:01,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:25:01,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:25:01,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:25:01,427 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:25:01,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:25:01,557 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:25:01,558 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:25:01 BoogieIcfgContainer [2021-05-22 02:25:01,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:25:01,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:25:01,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:25:01,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:25:01,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:01" (1/2) ... [2021-05-22 02:25:01,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30720090 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:25:01, skipping insertion in model container [2021-05-22 02:25:01,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:25:01" (2/2) ... [2021-05-22 02:25:01,563 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2021-05-22 02:25:01,566 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:25:01,567 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:25:01,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:25:01,567 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:25:01,619 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:25:01,634 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:25:01,654 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:25:01,654 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:25:01,654 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:25:01,654 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:25:01,654 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:25:01,655 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:25:01,655 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:25:01,655 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:25:01,660 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2021-05-22 02:25:01,673 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:25:01,679 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:01,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:01,680 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:01,683 INFO L82 PathProgramCache]: Analyzing trace with hash -884848578, now seen corresponding path program 1 times [2021-05-22 02:25:01,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:01,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871154731] [2021-05-22 02:25:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:01,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871154731] [2021-05-22 02:25:01,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871154731] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:01,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:01,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:25:01,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500298950] [2021-05-22 02:25:01,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:25:01,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:01,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:25:01,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:01,879 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 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 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,021 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2021-05-22 02:25:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:02,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-22 02:25:02,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,033 INFO L225 Difference]: With dead ends: 299 [2021-05-22 02:25:02,033 INFO L226 Difference]: Without dead ends: 286 [2021-05-22 02:25:02,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-22 02:25:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2021-05-22 02:25:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-05-22 02:25:02,065 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2021-05-22 02:25:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,065 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-05-22 02:25:02,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-05-22 02:25:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:25:02,066 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,066 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:25:02,067 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,067 INFO L82 PathProgramCache]: Analyzing trace with hash 961813113, now seen corresponding path program 1 times [2021-05-22 02:25:02,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398953521] [2021-05-22 02:25:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398953521] [2021-05-22 02:25:02,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398953521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937391435] [2021-05-22 02:25:02,100 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 [2021-05-22 02:25:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:25:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937391435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:02,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-22 02:25:02,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587266200] [2021-05-22 02:25:02,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:25:02,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:25:02,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:02,282 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,358 INFO L93 Difference]: Finished difference Result 284 states and 599 transitions. [2021-05-22 02:25:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:25:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:25:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,362 INFO L225 Difference]: With dead ends: 284 [2021-05-22 02:25:02,362 INFO L226 Difference]: Without dead ends: 284 [2021-05-22 02:25:02,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-22 02:25:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 124. [2021-05-22 02:25:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-05-22 02:25:02,382 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2021-05-22 02:25:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,382 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-05-22 02:25:02,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-05-22 02:25:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:25:02,383 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,383 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-22 02:25:02,601 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 713419811, now seen corresponding path program 1 times [2021-05-22 02:25:02,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124194359] [2021-05-22 02:25:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124194359] [2021-05-22 02:25:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124194359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:02,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:02,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034910414] [2021-05-22 02:25:02,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:02,627 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-05-22 02:25:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,668 INFO L93 Difference]: Finished difference Result 166 states and 354 transitions. [2021-05-22 02:25:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:02,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2021-05-22 02:25:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,673 INFO L225 Difference]: With dead ends: 166 [2021-05-22 02:25:02,673 INFO L226 Difference]: Without dead ends: 156 [2021-05-22 02:25:02,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-22 02:25:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2021-05-22 02:25:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-05-22 02:25:02,685 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2021-05-22 02:25:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,685 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-05-22 02:25:02,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-05-22 02:25:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-05-22 02:25:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:25:02,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,688 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:25:02,689 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1233373665, now seen corresponding path program 2 times [2021-05-22 02:25:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660375665] [2021-05-22 02:25:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660375665] [2021-05-22 02:25:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660375665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540729105] [2021-05-22 02:25:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:02,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:25:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540729105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:02,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-22 02:25:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091415846] [2021-05-22 02:25:02,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:02,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:02,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:02,799 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,893 INFO L93 Difference]: Finished difference Result 242 states and 545 transitions. [2021-05-22 02:25:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-05-22 02:25:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,894 INFO L225 Difference]: With dead ends: 242 [2021-05-22 02:25:02,894 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:25:02,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:25:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2021-05-22 02:25:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-05-22 02:25:02,903 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2021-05-22 02:25:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,903 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-05-22 02:25:02,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-05-22 02:25:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:25:02,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,905 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] [2021-05-22 02:25:03,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:03,119 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1164039970, now seen corresponding path program 1 times [2021-05-22 02:25:03,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378157117] [2021-05-22 02:25:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378157117] [2021-05-22 02:25:03,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378157117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366910811] [2021-05-22 02:25:03,279 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 [2021-05-22 02:25:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:25:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:03,405 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:25:03,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:03,613 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:25:03,616 INFO L168 Benchmark]: Toolchain (without parser) took 2293.07 ms. Allocated memory is still 398.5 MB. Free memory was 377.3 MB in the beginning and 258.0 MB in the end (delta: 119.3 MB). Peak memory consumption was 118.8 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:03,616 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 398.5 MB. Free memory is still 378.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:03,616 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.47 ms. Allocated memory is still 398.5 MB. Free memory was 377.3 MB in the beginning and 375.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:03,616 INFO L168 Benchmark]: Boogie Preprocessor took 12.51 ms. Allocated memory is still 398.5 MB. Free memory was 375.8 MB in the beginning and 374.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:03,616 INFO L168 Benchmark]: RCFGBuilder took 190.44 ms. Allocated memory is still 398.5 MB. Free memory was 374.8 MB in the beginning and 362.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:03,617 INFO L168 Benchmark]: TraceAbstraction took 2056.18 ms. Allocated memory is still 398.5 MB. Free memory was 362.4 MB in the beginning and 258.0 MB in the end (delta: 104.3 MB). Peak memory consumption was 104.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:03,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 398.5 MB. Free memory is still 378.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.47 ms. Allocated memory is still 398.5 MB. Free memory was 377.3 MB in the beginning and 375.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.51 ms. Allocated memory is still 398.5 MB. Free memory was 375.8 MB in the beginning and 374.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 190.44 ms. Allocated memory is still 398.5 MB. Free memory was 374.8 MB in the beginning and 362.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2056.18 ms. Allocated memory is still 398.5 MB. Free memory was 362.4 MB in the beginning and 258.0 MB in the end (delta: 104.3 MB). Peak memory consumption was 104.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...