/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/popl20/three-array-min.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:49:07,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:49:07,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:49:07,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-22 02:49:07,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-22 02:49:07,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-22 02:49:07,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-22 02:49:07,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-22 02:49:07,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-22 02:49:07,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-22 02:49:07,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-22 02:49:07,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-22 02:49:07,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-22 02:49:07,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-22 02:49:07,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-22 02:49:07,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-22 02:49:07,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-22 02:49:07,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-22 02:49:07,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-22 02:49:07,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-22 02:49:07,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-22 02:49:07,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-22 02:49:07,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-22 02:49:07,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-22 02:49:07,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-22 02:49:07,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-22 02:49:07,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-22 02:49:07,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-22 02:49:07,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-22 02:49:07,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-22 02:49:07,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-22 02:49:07,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-22 02:49:07,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-22 02:49:07,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-22 02:49:07,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-22 02:49:07,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-22 02:49:07,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-22 02:49:07,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-22 02:49:07,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:49:07,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:49:07,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:49:07,529 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 02:49:07,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:49:07,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:49:07,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:49:07,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:49:07,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:49:07,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:49:07,571 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:49:07,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:49:07,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:49:07,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:49:07,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:49:07,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:49:07,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:49:07,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:49:07,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:49:07,572 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:49:07,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:49:07,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:49:07,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:49:07,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:49:07,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:49:07,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:49:07,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:49:07,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:49:07,574 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:49:07,575 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:49:07,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:49:07,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:49:07,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:49:07,920 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:49:07,921 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:49:07,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-min.wvr.bpl [2021-05-22 02:49:07,922 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-min.wvr.bpl' [2021-05-22 02:49:07,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:49:07,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:49:07,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:07,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:49:07,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:49:07,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:08,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:49:08,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:49:08,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:49:08,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/1) ... [2021-05-22 02:49:08,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:49:08,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:49:08,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:49:08,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:49:08,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (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 02:49:08,091 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:49:08,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:49:08,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:49:08,091 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:49:08,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:49:08,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:49:08,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:49:08,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:49:08,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:49:08,092 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:49:08,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:49:08,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:49:08,093 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 02:49:08,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:49:08,382 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:49:08,384 INFO L202 PluginConnector]: Adding new model three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:08 BoogieIcfgContainer [2021-05-22 02:49:08,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:49:08,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:49:08,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:49:08,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:49:08,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:07" (1/2) ... [2021-05-22 02:49:08,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fa5727 and model type three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:49:08, skipping insertion in model container [2021-05-22 02:49:08,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-min.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:08" (2/2) ... [2021-05-22 02:49:08,390 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-min.wvr.bpl [2021-05-22 02:49:08,411 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:49:08,411 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:49:08,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:49:08,412 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:49:08,497 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:49:08,516 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:49:08,546 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:49:08,546 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:49:08,546 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:49:08,546 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:49:08,546 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:49:08,546 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:49:08,546 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:49:08,546 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:49:08,556 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 32 transitions, 88 flow [2021-05-22 02:49:08,582 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 136 states, 134 states have (on average 2.970149253731343) internal successors, (398), 135 states have internal predecessors, (398), 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 02:49:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 2.970149253731343) internal successors, (398), 135 states have internal predecessors, (398), 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 02:49:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:49:08,597 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:08,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:08,598 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 567574338, now seen corresponding path program 1 times [2021-05-22 02:49:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:08,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43978424] [2021-05-22 02:49:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:08,831 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 02:49:08,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:08,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43978424] [2021-05-22 02:49:08,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43978424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:08,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:08,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:49:08,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104075257] [2021-05-22 02:49:08,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:49:08,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:08,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:49:08,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:08,847 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 2.970149253731343) internal successors, (398), 135 states have internal predecessors, (398), 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 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 02:49:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:08,932 INFO L93 Difference]: Finished difference Result 474 states and 1450 transitions. [2021-05-22 02:49:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:49:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2021-05-22 02:49:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:08,947 INFO L225 Difference]: With dead ends: 474 [2021-05-22 02:49:08,947 INFO L226 Difference]: Without dead ends: 388 [2021-05-22 02:49:08,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:49:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-22 02:49:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 176. [2021-05-22 02:49:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0914285714285716) internal successors, (541), 175 states have internal predecessors, (541), 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 02:49:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 541 transitions. [2021-05-22 02:49:08,997 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 541 transitions. Word has length 19 [2021-05-22 02:49:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:08,998 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 541 transitions. [2021-05-22 02:49:08,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 02:49:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 541 transitions. [2021-05-22 02:49:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:49:09,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:09,000 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] [2021-05-22 02:49:09,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:49:09,001 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash -140933138, now seen corresponding path program 1 times [2021-05-22 02:49:09,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:09,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419491126] [2021-05-22 02:49:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:09,043 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 02:49:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419491126] [2021-05-22 02:49:09,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419491126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:09,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:09,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:49:09,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324525883] [2021-05-22 02:49:09,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:49:09,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:09,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:49:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:09,050 INFO L87 Difference]: Start difference. First operand 176 states and 541 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:09,137 INFO L93 Difference]: Finished difference Result 346 states and 1050 transitions. [2021-05-22 02:49:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:49:09,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-22 02:49:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:09,141 INFO L225 Difference]: With dead ends: 346 [2021-05-22 02:49:09,141 INFO L226 Difference]: Without dead ends: 323 [2021-05-22 02:49:09,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-22 02:49:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 253. [2021-05-22 02:49:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.142857142857143) internal successors, (792), 252 states have internal predecessors, (792), 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 02:49:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 792 transitions. [2021-05-22 02:49:09,163 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 792 transitions. Word has length 22 [2021-05-22 02:49:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:09,163 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 792 transitions. [2021-05-22 02:49:09,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 792 transitions. [2021-05-22 02:49:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:49:09,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:09,167 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] [2021-05-22 02:49:09,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:49:09,167 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1960572944, now seen corresponding path program 2 times [2021-05-22 02:49:09,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:09,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220666367] [2021-05-22 02:49:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:09,217 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 02:49:09,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220666367] [2021-05-22 02:49:09,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220666367] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:09,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:09,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:49:09,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89900899] [2021-05-22 02:49:09,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:49:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:49:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:09,224 INFO L87 Difference]: Start difference. First operand 253 states and 792 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:09,288 INFO L93 Difference]: Finished difference Result 495 states and 1542 transitions. [2021-05-22 02:49:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:49:09,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-22 02:49:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:09,298 INFO L225 Difference]: With dead ends: 495 [2021-05-22 02:49:09,298 INFO L226 Difference]: Without dead ends: 472 [2021-05-22 02:49:09,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-22 02:49:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 304. [2021-05-22 02:49:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.283828382838284) internal successors, (995), 303 states have internal predecessors, (995), 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 02:49:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 995 transitions. [2021-05-22 02:49:09,338 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 995 transitions. Word has length 22 [2021-05-22 02:49:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:09,339 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 995 transitions. [2021-05-22 02:49:09,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 995 transitions. [2021-05-22 02:49:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-22 02:49:09,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:09,340 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] [2021-05-22 02:49:09,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:49:09,341 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash -515537296, now seen corresponding path program 3 times [2021-05-22 02:49:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:09,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032892440] [2021-05-22 02:49:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:09,375 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 02:49:09,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:09,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032892440] [2021-05-22 02:49:09,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032892440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:09,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:09,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:49:09,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327494008] [2021-05-22 02:49:09,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:49:09,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:49:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:09,379 INFO L87 Difference]: Start difference. First operand 304 states and 995 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:09,445 INFO L93 Difference]: Finished difference Result 348 states and 1103 transitions. [2021-05-22 02:49:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:49:09,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-22 02:49:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:09,447 INFO L225 Difference]: With dead ends: 348 [2021-05-22 02:49:09,447 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:49:09,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:49:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 296. [2021-05-22 02:49:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.169491525423729) internal successors, (935), 295 states have internal predecessors, (935), 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 02:49:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 935 transitions. [2021-05-22 02:49:09,459 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 935 transitions. Word has length 22 [2021-05-22 02:49:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:09,459 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 935 transitions. [2021-05-22 02:49:09,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 935 transitions. [2021-05-22 02:49:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-22 02:49:09,461 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:09,461 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] [2021-05-22 02:49:09,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:49:09,461 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 988591096, now seen corresponding path program 1 times [2021-05-22 02:49:09,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:09,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633090757] [2021-05-22 02:49:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:09,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:09,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633090757] [2021-05-22 02:49:09,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633090757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:09,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:09,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:49:09,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399402961] [2021-05-22 02:49:09,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:49:09,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:49:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:09,537 INFO L87 Difference]: Start difference. First operand 296 states and 935 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 02:49:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:09,576 INFO L93 Difference]: Finished difference Result 309 states and 971 transitions. [2021-05-22 02:49:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:49:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 24 [2021-05-22 02:49:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:09,579 INFO L225 Difference]: With dead ends: 309 [2021-05-22 02:49:09,579 INFO L226 Difference]: Without dead ends: 309 [2021-05-22 02:49:09,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-22 02:49:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 256. [2021-05-22 02:49:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.1372549019607843) internal successors, (800), 255 states have internal predecessors, (800), 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 02:49:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 800 transitions. [2021-05-22 02:49:09,587 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 800 transitions. Word has length 24 [2021-05-22 02:49:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:09,587 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 800 transitions. [2021-05-22 02:49:09,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 02:49:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 800 transitions. [2021-05-22 02:49:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:49:09,588 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:09,589 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, 1] [2021-05-22 02:49:09,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:49:09,589 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2015295284, now seen corresponding path program 1 times [2021-05-22 02:49:09,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:09,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568573928] [2021-05-22 02:49:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:09,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:09,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568573928] [2021-05-22 02:49:09,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568573928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:09,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192772537] [2021-05-22 02:49:09,865 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 02:49:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:09,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:49:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:10,391 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:49:10,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-22 02:49:10,592 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:49:10,595 INFO L168 Benchmark]: Toolchain (without parser) took 2615.64 ms. Allocated memory is still 337.6 MB. Free memory was 317.0 MB in the beginning and 191.5 MB in the end (delta: 125.5 MB). Peak memory consumption was 122.8 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:10,595 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 337.6 MB. Free memory is still 318.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:10,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.90 ms. Allocated memory is still 337.6 MB. Free memory was 317.0 MB in the beginning and 315.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:10,595 INFO L168 Benchmark]: Boogie Preprocessor took 20.13 ms. Allocated memory is still 337.6 MB. Free memory was 315.5 MB in the beginning and 314.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:10,595 INFO L168 Benchmark]: RCFGBuilder took 350.85 ms. Allocated memory is still 337.6 MB. Free memory was 314.4 MB in the beginning and 300.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:10,595 INFO L168 Benchmark]: TraceAbstraction took 2208.56 ms. Allocated memory is still 337.6 MB. Free memory was 299.6 MB in the beginning and 191.5 MB in the end (delta: 108.1 MB). Peak memory consumption was 106.0 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:10,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 337.6 MB. Free memory is still 318.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.90 ms. Allocated memory is still 337.6 MB. Free memory was 317.0 MB in the beginning and 315.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.13 ms. Allocated memory is still 337.6 MB. Free memory was 315.5 MB in the beginning and 314.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 350.85 ms. Allocated memory is still 337.6 MB. Free memory was 314.4 MB in the beginning and 300.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2208.56 ms. Allocated memory is still 337.6 MB. Free memory was 299.6 MB in the beginning and 191.5 MB in the end (delta: 108.1 MB). Peak memory consumption was 106.0 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...