/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/popl20/horseshoe.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:06:35,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:06:35,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:06:35,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-21 21:06:35,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-21 21:06:35,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-21 21:06:35,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-21 21:06:35,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-21 21:06:35,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-21 21:06:35,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-21 21:06:35,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-21 21:06:35,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-21 21:06:35,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 21:06:35,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 21:06:35,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 21:06:35,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 21:06:35,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 21:06:35,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 21:06:35,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 21:06:35,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 21:06:35,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 21:06:35,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 21:06:35,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 21:06:35,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 21:06:35,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-21 21:06:35,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-21 21:06:35,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-21 21:06:35,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-21 21:06:35,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-21 21:06:35,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-21 21:06:35,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-21 21:06:35,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-21 21:06:35,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-21 21:06:35,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-21 21:06:35,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-21 21:06:35,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-21 21:06:35,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-21 21:06:35,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-21 21:06:35,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:06:35,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:06:35,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:06:35,555 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 [2021-05-21 21:06:35,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:06:35,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:06:35,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:06:35,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:06:35,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:06:35,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:06:35,583 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:06:35,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:06:35,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:06:35,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:06:35,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:06:35,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:06:35,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:06:35,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:06:35,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:06:35,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:06:35,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:06:35,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:06:35,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:06:35,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:06:35,586 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:06:35,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:06:35,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:06:35,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:06:35,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:06:35,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:06:35,841 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:06:35,842 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:06:35,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl [2021-05-21 21:06:35,843 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl' [2021-05-21 21:06:35,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:06:35,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:06:35,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:06:35,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:06:35,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:06:35,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:06:35,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:06:35,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:06:35,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:06:35,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/1) ... [2021-05-21 21:06:35,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:06:35,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:06:35,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:06:35,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:06:35,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (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 [2021-05-21 21:06:35,993 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:06:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:06:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:06:35,994 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:06:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:06:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:06:35,994 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:06:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:06:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:06:35,995 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:06:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:06:35,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:06:35,996 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:06:36,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:06:36,151 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:06:36,152 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:06:36 BoogieIcfgContainer [2021-05-21 21:06:36,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:06:36,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:06:36,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:06:36,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:06:36,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:06:35" (1/2) ... [2021-05-21 21:06:36,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b268c6c and model type horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:06:36, skipping insertion in model container [2021-05-21 21:06:36,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:06:36" (2/2) ... [2021-05-21 21:06:36,157 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe.wvr.bpl [2021-05-21 21:06:36,161 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:06:36,161 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:06:36,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:06:36,161 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:06:36,213 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 21:06:36,229 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 21:06:36,242 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:06:36,243 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:06:36,243 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:06:36,243 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:06:36,243 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:06:36,243 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:06:36,243 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:06:36,243 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:06:36,252 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-05-21 21:06:36,306 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 21:06:36,321 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:06:36,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:06:36,321 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:06:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:06:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1822169931, now seen corresponding path program 1 times [2021-05-21 21:06:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:06:36,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550406927] [2021-05-21 21:06:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:06:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:06:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:06:36,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:06:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550406927] [2021-05-21 21:06:36,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550406927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:06:36,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:06:36,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 21:06:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351277133] [2021-05-21 21:06:36,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:06:36,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:06:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:06:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:06:36,459 INFO L87 Difference]: Start difference. First operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:06:36,500 INFO L93 Difference]: Finished difference Result 401 states and 1181 transitions. [2021-05-21 21:06:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:06:36,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-05-21 21:06:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:06:36,511 INFO L225 Difference]: With dead ends: 401 [2021-05-21 21:06:36,511 INFO L226 Difference]: Without dead ends: 401 [2021-05-21 21:06:36,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:06:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-21 21:06:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-05-21 21:06:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.9525) internal successors, (1181), 400 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1181 transitions. [2021-05-21 21:06:36,558 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1181 transitions. Word has length 16 [2021-05-21 21:06:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:06:36,558 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1181 transitions. [2021-05-21 21:06:36,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1181 transitions. [2021-05-21 21:06:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:06:36,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:06:36,561 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] [2021-05-21 21:06:36,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:06:36,561 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:06:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:06:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2093701423, now seen corresponding path program 1 times [2021-05-21 21:06:36,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:06:36,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232190783] [2021-05-21 21:06:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:06:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:06:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:06:36,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:06:36,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232190783] [2021-05-21 21:06:36,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232190783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:06:36,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:06:36,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 21:06:36,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330931595] [2021-05-21 21:06:36,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:06:36,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:06:36,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:06:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:06:36,584 INFO L87 Difference]: Start difference. First operand 401 states and 1181 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:06:36,593 INFO L93 Difference]: Finished difference Result 458 states and 1351 transitions. [2021-05-21 21:06:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:06:36,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-05-21 21:06:36,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:06:36,596 INFO L225 Difference]: With dead ends: 458 [2021-05-21 21:06:36,596 INFO L226 Difference]: Without dead ends: 458 [2021-05-21 21:06:36,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:06:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-21 21:06:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-05-21 21:06:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.9562363238512037) internal successors, (1351), 457 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1351 transitions. [2021-05-21 21:06:36,613 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1351 transitions. Word has length 21 [2021-05-21 21:06:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:06:36,613 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1351 transitions. [2021-05-21 21:06:36,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1351 transitions. [2021-05-21 21:06:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:06:36,615 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:06:36,615 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, 1, 1] [2021-05-21 21:06:36,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:06:36,615 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:06:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:06:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash 412173230, now seen corresponding path program 1 times [2021-05-21 21:06:36,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:06:36,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104534779] [2021-05-21 21:06:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:06:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:06:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:06:36,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:06:36,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104534779] [2021-05-21 21:06:36,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104534779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:06:36,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:06:36,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 21:06:36,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559804685] [2021-05-21 21:06:36,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:06:36,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:06:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:06:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:06:36,647 INFO L87 Difference]: Start difference. First operand 458 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:06:36,658 INFO L93 Difference]: Finished difference Result 463 states and 1345 transitions. [2021-05-21 21:06:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:06:36,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:06:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:06:36,663 INFO L225 Difference]: With dead ends: 463 [2021-05-21 21:06:36,665 INFO L226 Difference]: Without dead ends: 463 [2021-05-21 21:06:36,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:06:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-05-21 21:06:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2021-05-21 21:06:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-05-21 21:06:36,690 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 25 [2021-05-21 21:06:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:06:36,690 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-05-21 21:06:36,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-05-21 21:06:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:06:36,692 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:06:36,692 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, 1, 1] [2021-05-21 21:06:36,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:06:36,692 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:06:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:06:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1863818432, now seen corresponding path program 2 times [2021-05-21 21:06:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:06:36,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817664458] [2021-05-21 21:06:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:06:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:06:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:06:37,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:06:37,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817664458] [2021-05-21 21:06:37,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817664458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:06:37,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222841149] [2021-05-21 21:06:37,012 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 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 [2021-05-21 21:06:37,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:06:37,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:06:37,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:06:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:06:37,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-21 21:06:37,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:06:37,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:06:37,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:06:37,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-05-21 21:06:37,362 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 21:06:37,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:06:37,577 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 21:06:37,580 INFO L168 Benchmark]: Toolchain (without parser) took 1693.67 ms. Allocated memory is still 396.4 MB. Free memory was 374.9 MB in the beginning and 343.7 MB in the end (delta: 31.1 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.0 GB. [2021-05-21 21:06:37,580 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 396.4 MB. Free memory was 376.1 MB in the beginning and 376.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:06:37,580 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.67 ms. Allocated memory is still 396.4 MB. Free memory was 374.8 MB in the beginning and 373.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:06:37,581 INFO L168 Benchmark]: Boogie Preprocessor took 13.50 ms. Allocated memory is still 396.4 MB. Free memory was 373.4 MB in the beginning and 372.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:06:37,581 INFO L168 Benchmark]: RCFGBuilder took 207.98 ms. Allocated memory is still 396.4 MB. Free memory was 372.2 MB in the beginning and 356.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-21 21:06:37,581 INFO L168 Benchmark]: TraceAbstraction took 1425.69 ms. Allocated memory is still 396.4 MB. Free memory was 356.3 MB in the beginning and 343.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.0 GB. [2021-05-21 21:06:37,582 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 396.4 MB. Free memory was 376.1 MB in the beginning and 376.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 42.67 ms. Allocated memory is still 396.4 MB. Free memory was 374.8 MB in the beginning and 373.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.50 ms. Allocated memory is still 396.4 MB. Free memory was 373.4 MB in the beginning and 372.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 207.98 ms. Allocated memory is still 396.4 MB. Free memory was 372.2 MB in the beginning and 356.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1425.69 ms. Allocated memory is still 396.4 MB. Free memory was 356.3 MB in the beginning and 343.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.8 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...