/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/loop-tiling-eq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:06:40,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:06:40,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:06:40,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:06:40,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:06:40,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:06:40,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:06:40,190 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 02:06:40,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:06:40,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:06:40,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:06:40,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:06:40,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:06:40,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:06:40,226 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:06:40,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:06:40,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:06:40,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:06:40,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:06:40,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:06:40,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:06:40,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:06:40,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:06:40,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:06:40,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:06:40,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:06:40,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:06:40,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:06:40,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:06:40,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:06:40,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:06:40,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:06:40,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:06:40,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:06:40,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:06:40,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:06:40,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:06:40,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:06:40,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:06:40,242 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:06:40,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:06:40,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:06:40,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:06:40,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:06:40,780 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:06:40,782 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:06:40,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl [2021-05-22 02:06:40,783 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl' [2021-05-22 02:06:40,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:06:40,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:06:40,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:06:40,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:06:40,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:06:40,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:06:40,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:06:40,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:06:40,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:06:40,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/1) ... [2021-05-22 02:06:40,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:06:40,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:06:40,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:06:40,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:06:40,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (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 02:06:41,011 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:06:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:06:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:06:41,012 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:06:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:06:41,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:06:41,012 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:06:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:06:41,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:06:41,013 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 02:06:41,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:06:41,283 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-22 02:06:41,291 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-22 02:06:41,305 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-22 02:06:41,306 INFO L202 PluginConnector]: Adding new model loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:06:41 BoogieIcfgContainer [2021-05-22 02:06:41,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:06:41,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:06:41,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:06:41,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:06:41,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:06:40" (1/2) ... [2021-05-22 02:06:41,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff154d2 and model type loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:06:41, skipping insertion in model container [2021-05-22 02:06:41,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:06:41" (2/2) ... [2021-05-22 02:06:41,313 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.bpl [2021-05-22 02:06:41,317 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:06:41,317 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:06:41,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:06:41,318 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:06:41,384 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:06:41,425 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:06:41,455 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:06:41,455 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:06:41,455 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:06:41,457 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:06:41,457 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:06:41,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:06:41,458 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:06:41,458 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:06:41,469 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 18 transitions, 52 flow [2021-05-22 02:06:41,481 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 02:06:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 02:06:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-22 02:06:41,489 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:06:41,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:06:41,490 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:06:41,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:06:41,495 INFO L82 PathProgramCache]: Analyzing trace with hash -37685658, now seen corresponding path program 1 times [2021-05-22 02:06:41,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:06:41,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903981170] [2021-05-22 02:06:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:06:41,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-22 02:06:41,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883400398] [2021-05-22 02:06:41,612 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 02:06:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:06:41,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:06:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:06:41,861 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 02:06:41,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:06:41,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903981170] [2021-05-22 02:06:41,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-22 02:06:41,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883400398] [2021-05-22 02:06:41,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883400398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:06:41,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:06:41,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:06:41,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208655414] [2021-05-22 02:06:41,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:06:41,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:06:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:06:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:06:41,883 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 02:06:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:06:41,933 INFO L93 Difference]: Finished difference Result 36 states and 75 transitions. [2021-05-22 02:06:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:06:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-05-22 02:06:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:06:41,943 INFO L225 Difference]: With dead ends: 36 [2021-05-22 02:06:41,943 INFO L226 Difference]: Without dead ends: 31 [2021-05-22 02:06:41,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:06:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-22 02:06:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-05-22 02:06:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:06:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 54 transitions. [2021-05-22 02:06:41,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 54 transitions. Word has length 10 [2021-05-22 02:06:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:06:41,987 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 54 transitions. [2021-05-22 02:06:41,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 02:06:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 54 transitions. [2021-05-22 02:06:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:06:41,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:06:41,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:06:42,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-22 02:06:42,215 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:06:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:06:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1889973719, now seen corresponding path program 1 times [2021-05-22 02:06:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:06:42,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349352318] [2021-05-22 02:06:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:06:42,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-22 02:06:42,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347423315] [2021-05-22 02:06:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:06:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:06:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:06:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:06:42,372 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 02:06:42,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:06:42,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349352318] [2021-05-22 02:06:42,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-22 02:06:42,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347423315] [2021-05-22 02:06:42,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347423315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:06:42,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:06:42,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:06:42,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572536941] [2021-05-22 02:06:42,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:06:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:06:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:06:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:06:42,375 INFO L87 Difference]: Start difference. First operand 27 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 02:06:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:06:42,402 INFO L93 Difference]: Finished difference Result 44 states and 95 transitions. [2021-05-22 02:06:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:06:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-05-22 02:06:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:06:42,405 INFO L225 Difference]: With dead ends: 44 [2021-05-22 02:06:42,405 INFO L226 Difference]: Without dead ends: 31 [2021-05-22 02:06:42,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:06:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-22 02:06:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-22 02:06:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:06:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 62 transitions. [2021-05-22 02:06:42,418 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 62 transitions. Word has length 12 [2021-05-22 02:06:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:06:42,418 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 62 transitions. [2021-05-22 02:06:42,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 02:06:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 62 transitions. [2021-05-22 02:06:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:06:42,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:06:42,419 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:06:42,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:06:42,643 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:06:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:06:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1513355601, now seen corresponding path program 1 times [2021-05-22 02:06:42,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:06:42,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707647027] [2021-05-22 02:06:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:06:42,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-22 02:06:42,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821490928] [2021-05-22 02:06:42,649 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 02:06:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:06:42,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:06:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:06:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:06:42,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:06:42,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707647027] [2021-05-22 02:06:42,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-22 02:06:42,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821490928] [2021-05-22 02:06:42,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821490928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:06:42,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-22 02:06:42,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-22 02:06:42,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971490020] [2021-05-22 02:06:42,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:06:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:06:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:06:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:06:42,936 INFO L87 Difference]: Start difference. First operand 31 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 02:06:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:06:43,035 INFO L93 Difference]: Finished difference Result 63 states and 124 transitions. [2021-05-22 02:06:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:06:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 02:06:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:06:43,037 INFO L225 Difference]: With dead ends: 63 [2021-05-22 02:06:43,037 INFO L226 Difference]: Without dead ends: 38 [2021-05-22 02:06:43,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:06:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-22 02:06:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-22 02:06:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 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 02:06:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 77 transitions. [2021-05-22 02:06:43,048 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 77 transitions. Word has length 13 [2021-05-22 02:06:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:06:43,048 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 77 transitions. [2021-05-22 02:06:43,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 02:06:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 77 transitions. [2021-05-22 02:06:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:06:43,050 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:06:43,050 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:06:43,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:06:43,273 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:06:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:06:43,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1697007933, now seen corresponding path program 1 times [2021-05-22 02:06:43,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:06:43,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425202489] [2021-05-22 02:06:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:06:43,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-22 02:06:43,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012808315] [2021-05-22 02:06:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:06:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:06:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:06:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:06:43,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:06:43,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425202489] [2021-05-22 02:06:43,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-22 02:06:43,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012808315] [2021-05-22 02:06:43,393 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:06:43,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:06:43,609 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.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:06:43,612 INFO L168 Benchmark]: Toolchain (without parser) took 2792.26 ms. Allocated memory is still 335.5 MB. Free memory was 314.6 MB in the beginning and 225.5 MB in the end (delta: 89.1 MB). Peak memory consumption was 90.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:06:43,613 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 335.5 MB. Free memory is still 315.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:06:43,613 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.65 ms. Allocated memory is still 335.5 MB. Free memory was 314.4 MB in the beginning and 313.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:06:43,613 INFO L168 Benchmark]: Boogie Preprocessor took 20.06 ms. Allocated memory is still 335.5 MB. Free memory was 313.0 MB in the beginning and 312.0 MB in the end (delta: 968.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:06:43,613 INFO L168 Benchmark]: RCFGBuilder took 435.10 ms. Allocated memory is still 335.5 MB. Free memory was 312.0 MB in the beginning and 297.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:06:43,613 INFO L168 Benchmark]: TraceAbstraction took 2304.07 ms. Allocated memory is still 335.5 MB. Free memory was 297.4 MB in the beginning and 225.5 MB in the end (delta: 71.9 MB). Peak memory consumption was 73.8 MB. Max. memory is 16.0 GB. [2021-05-22 02:06:43,614 INFO L339 ainManager$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 335.5 MB. Free memory is still 315.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.65 ms. Allocated memory is still 335.5 MB. Free memory was 314.4 MB in the beginning and 313.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.06 ms. Allocated memory is still 335.5 MB. Free memory was 313.0 MB in the beginning and 312.0 MB in the end (delta: 968.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 435.10 ms. Allocated memory is still 335.5 MB. Free memory was 312.0 MB in the beginning and 297.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2304.07 ms. Allocated memory is still 335.5 MB. Free memory was 297.4 MB in the beginning and 225.5 MB in the end (delta: 71.9 MB). Peak memory consumption was 73.8 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...