/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:49:00,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:49:00,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:49:00,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:49:00,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 20:49:00,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:49:00,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:49:00,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:49:00,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:49:00,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:49:00,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:49:00,914 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:49:00,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:49:00,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:49:00,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:49:00,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:49:00,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:49:00,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:49:00,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:49:00,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:49:00,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:49:00,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:49:00,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:49:00,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:49:00,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:49:00,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:49:00,918 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:49:00,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:49:00,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:49:01,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:49:01,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:49:01,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:49:01,245 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:49:01,246 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:49:01,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl [2021-05-21 20:49:01,247 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl' [2021-05-21 20:49:01,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:49:01,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:49:01,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:49:01,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:49:01,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:49:01,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:49:01,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:49:01,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:49:01,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:49:01,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... [2021-05-21 20:49:01,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:49:01,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:49:01,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:49:01,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:49:01,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:49:01,395 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:49:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:49:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:49:01,397 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:49:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:49:01,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:49:01,397 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:49:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:49:01,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:49:01,398 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:49:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:49:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:49:01,400 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:49:01,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:49:01,544 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:49:01,545 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:49:01 BoogieIcfgContainer [2021-05-21 20:49:01,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:49:01,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:49:01,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:49:01,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:49:01,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:49:01" (1/2) ... [2021-05-21 20:49:01,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80d4b3a and model type simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:49:01, skipping insertion in model container [2021-05-21 20:49:01,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:49:01" (2/2) ... [2021-05-21 20:49:01,551 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-subst.wvr.bpl [2021-05-21 20:49:01,556 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:49:01,556 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:49:01,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:49:01,557 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:49:01,586 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:49:01,604 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:49:01,623 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:49:01,623 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:49:01,623 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:49:01,623 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:49:01,623 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:49:01,623 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:49:01,624 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:49:01,624 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:49:01,631 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-05-21 20:49:01,642 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:49:01,650 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:01,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:01,651 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1166046104, now seen corresponding path program 1 times [2021-05-21 20:49:01,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:01,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460920423] [2021-05-21 20:49:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:02,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:02,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460920423] [2021-05-21 20:49:02,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460920423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:02,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:02,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:02,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774361839] [2021-05-21 20:49:02,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:02,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:02,389 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 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 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:02,585 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-05-21 20:49:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-21 20:49:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:02,594 INFO L225 Difference]: With dead ends: 98 [2021-05-21 20:49:02,594 INFO L226 Difference]: Without dead ends: 72 [2021-05-21 20:49:02,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-21 20:49:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-05-21 20:49:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-05-21 20:49:02,639 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-05-21 20:49:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:02,639 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-05-21 20:49:02,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-05-21 20:49:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:49:02,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:02,640 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:02,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:49:02,641 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1802957416, now seen corresponding path program 2 times [2021-05-21 20:49:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:02,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351718512] [2021-05-21 20:49:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:02,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351718512] [2021-05-21 20:49:02,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351718512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:02,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:02,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:02,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456337834] [2021-05-21 20:49:02,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:02,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:02,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:02,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:02,942 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:03,103 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-05-21 20:49:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-21 20:49:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:03,105 INFO L225 Difference]: With dead ends: 93 [2021-05-21 20:49:03,105 INFO L226 Difference]: Without dead ends: 65 [2021-05-21 20:49:03,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-21 20:49:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-05-21 20:49:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-05-21 20:49:03,121 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-05-21 20:49:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:03,121 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-05-21 20:49:03,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-05-21 20:49:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:49:03,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:03,123 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:03,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:49:03,124 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2138675608, now seen corresponding path program 3 times [2021-05-21 20:49:03,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:03,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790660835] [2021-05-21 20:49:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:03,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:03,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790660835] [2021-05-21 20:49:03,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790660835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:03,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:03,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:03,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121194282] [2021-05-21 20:49:03,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:03,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:03,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:03,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:03,440 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:03,714 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-21 20:49:03,950 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-21 20:49:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:03,957 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-05-21 20:49:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-21 20:49:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:03,974 INFO L225 Difference]: With dead ends: 80 [2021-05-21 20:49:03,974 INFO L226 Difference]: Without dead ends: 54 [2021-05-21 20:49:03,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-21 20:49:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-21 20:49:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-05-21 20:49:03,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-05-21 20:49:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:03,987 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-05-21 20:49:03,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-05-21 20:49:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:49:03,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:03,988 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:49:03,988 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1206578362, now seen corresponding path program 4 times [2021-05-21 20:49:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:03,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757911295] [2021-05-21 20:49:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:04,234 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-21 20:49:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:04,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:04,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757911295] [2021-05-21 20:49:04,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757911295] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:04,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:04,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:04,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464327500] [2021-05-21 20:49:04,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:04,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:04,288 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:04,430 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-21 20:49:04,589 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-05-21 20:49:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:04,597 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-05-21 20:49:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:04,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-21 20:49:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:04,598 INFO L225 Difference]: With dead ends: 56 [2021-05-21 20:49:04,598 INFO L226 Difference]: Without dead ends: 33 [2021-05-21 20:49:04,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-21 20:49:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-21 20:49:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-05-21 20:49:04,601 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-05-21 20:49:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:04,601 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-05-21 20:49:04,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-05-21 20:49:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:49:04,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:04,602 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:04,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:49:04,602 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash 531109562, now seen corresponding path program 5 times [2021-05-21 20:49:04,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:04,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026345666] [2021-05-21 20:49:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:04,869 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-05-21 20:49:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:04,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:04,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026345666] [2021-05-21 20:49:04,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026345666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:04,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:04,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:04,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420867898] [2021-05-21 20:49:04,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:04,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:04,937 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:05,172 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-05-21 20:49:05,438 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-05-21 20:49:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:05,443 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-05-21 20:49:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-21 20:49:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:05,443 INFO L225 Difference]: With dead ends: 48 [2021-05-21 20:49:05,443 INFO L226 Difference]: Without dead ends: 27 [2021-05-21 20:49:05,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 717.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-21 20:49:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-21 20:49:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-05-21 20:49:05,445 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-05-21 20:49:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:05,446 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-05-21 20:49:05,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-05-21 20:49:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:49:05,446 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:49:05,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:49:05,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:49:05,447 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:49:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:49:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash 202726680, now seen corresponding path program 6 times [2021-05-21 20:49:05,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:49:05,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392006999] [2021-05-21 20:49:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:49:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:49:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:49:05,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:49:05,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392006999] [2021-05-21 20:49:05,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392006999] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:49:05,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:49:05,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:49:05,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031812563] [2021-05-21 20:49:05,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:49:05,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:49:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:49:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:49:05,684 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:49:05,881 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-05-21 20:49:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:49:05,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-21 20:49:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:49:05,882 INFO L225 Difference]: With dead ends: 25 [2021-05-21 20:49:05,882 INFO L226 Difference]: Without dead ends: 0 [2021-05-21 20:49:05,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:49:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-21 20:49:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-21 20:49:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-21 20:49:05,883 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-21 20:49:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:49:05,883 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-21 20:49:05,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:49:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-21 20:49:05,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 20:49:05,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 20:49:05,886 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 20:49:05,888 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 08:49:05 BasicIcfg [2021-05-21 20:49:05,888 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 20:49:05,889 INFO L168 Benchmark]: Toolchain (without parser) took 4604.93 ms. Allocated memory is still 377.5 MB. Free memory was 357.2 MB in the beginning and 146.6 MB in the end (delta: 210.6 MB). Peak memory consumption was 211.3 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:05,889 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 377.5 MB. Free memory is still 358.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:49:05,889 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.74 ms. Allocated memory is still 377.5 MB. Free memory was 357.1 MB in the beginning and 355.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:05,890 INFO L168 Benchmark]: Boogie Preprocessor took 10.73 ms. Allocated memory is still 377.5 MB. Free memory was 355.6 MB in the beginning and 354.8 MB in the end (delta: 839.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:49:05,890 INFO L168 Benchmark]: RCFGBuilder took 227.24 ms. Allocated memory is still 377.5 MB. Free memory was 354.7 MB in the beginning and 344.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:05,891 INFO L168 Benchmark]: TraceAbstraction took 4341.45 ms. Allocated memory is still 377.5 MB. Free memory was 344.1 MB in the beginning and 146.6 MB in the end (delta: 197.5 MB). Peak memory consumption was 196.6 MB. Max. memory is 16.0 GB. [2021-05-21 20:49:05,892 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 0.14 ms. Allocated memory is still 377.5 MB. Free memory is still 358.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.74 ms. Allocated memory is still 377.5 MB. Free memory was 357.1 MB in the beginning and 355.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.73 ms. Allocated memory is still 377.5 MB. Free memory was 355.6 MB in the beginning and 354.8 MB in the end (delta: 839.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 227.24 ms. Allocated memory is still 377.5 MB. Free memory was 354.7 MB in the beginning and 344.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4341.45 ms. Allocated memory is still 377.5 MB. Free memory was 344.1 MB in the beginning and 146.6 MB in the end (delta: 197.5 MB). Peak memory consumption was 196.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4262.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 11.8ms, AutomataDifference: 1937.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 77.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2966.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 63.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.2ms SsaConstructionTime, 113.0ms SatisfiabilityAnalysisTime, 1965.6ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2198 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...