/usr/bin/java -Xmx8000000000 -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/container-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:33:03,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:33:03,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:33:03,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:33:04,052 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 [2021-07-09 17:33:04,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:33:04,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:33:04,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:33:04,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:33:04,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:33:04,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:33:04,092 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:33:04,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:33:04,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:33:04,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:33:04,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:33:04,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:33:04,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:33:04,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:33:04,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:33:04,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:33:04,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:33:04,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:33:04,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:33:04,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:33:04,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:33:04,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:33:04,096 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:33:04,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:33:04,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:33:04,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:33:04,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:33:04,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:33:04,432 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:33:04,433 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:33:04,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl [2021-07-09 17:33:04,434 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl' [2021-07-09 17:33:04,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:33:04,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:33:04,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:33:04,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:33:04,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:33:04,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:33:04,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:33:04,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:33:04,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:33:04,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/1) ... [2021-07-09 17:33:04,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:33:04,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:33:04,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:33:04,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:33:04,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (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 [2021-07-09 17:33:04,595 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:33:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:33:04,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:33:04,596 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:33:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:33:04,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:33:04,597 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:33:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:33:04,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:33:04,598 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:33:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:33:04,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:33:04,600 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:33:04,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:33:04,853 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:33:04,855 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:33:04 BoogieIcfgContainer [2021-07-09 17:33:04,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:33:04,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:33:04,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:33:04,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:33:04,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:33:04" (1/2) ... [2021-07-09 17:33:04,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714c537b and model type container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:33:04, skipping insertion in model container [2021-07-09 17:33:04,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:33:04" (2/2) ... [2021-07-09 17:33:04,861 INFO L111 eAbstractionObserver]: Analyzing ICFG container-subst.wvr.bpl [2021-07-09 17:33:04,881 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:33:04,881 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:33:04,881 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:33:04,882 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:33:04,928 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:33:04,949 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:33:04,966 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:33:04,967 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:33:04,967 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:33:04,967 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:33:04,967 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:33:04,967 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:33:04,967 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:33:04,967 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:33:04,975 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-07-09 17:33:04,991 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 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) [2021-07-09 17:33:04,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 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) [2021-07-09 17:33:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:33:04,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:05,000 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:05,001 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1365396696, now seen corresponding path program 1 times [2021-07-09 17:33:05,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:05,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580354237] [2021-07-09 17:33:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:05,797 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-07-09 17:33:06,708 WARN L205 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 141 [2021-07-09 17:33:07,315 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72 [2021-07-09 17:33:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:07,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:07,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580354237] [2021-07-09 17:33:07,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580354237] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:07,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:07,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:33:07,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492008325] [2021-07-09 17:33:07,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:33:07,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:07,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:33:07,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:07,419 INFO L87 Difference]: Start difference. First operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 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) [2021-07-09 17:33:07,805 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 110 [2021-07-09 17:33:08,273 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 124 [2021-07-09 17:33:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:08,286 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-07-09 17:33:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:33:08,288 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 [2021-07-09 17:33:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:08,294 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:33:08,294 INFO L226 Difference]: Without dead ends: 72 [2021-07-09 17:33:08,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1574.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:33:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-09 17:33:08,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-07-09 17:33:08,322 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) [2021-07-09 17:33:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-07-09 17:33:08,324 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-07-09 17:33:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:08,325 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-07-09 17:33:08,325 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) [2021-07-09 17:33:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-07-09 17:33:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:33:08,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:08,326 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:08,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:33:08,326 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash -39432920, now seen corresponding path program 2 times [2021-07-09 17:33:08,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:08,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658336228] [2021-07-09 17:33:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:08,540 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-07-09 17:33:08,714 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-07-09 17:33:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:08,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658336228] [2021-07-09 17:33:08,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658336228] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:08,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:08,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:33:08,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827351608] [2021-07-09 17:33:08,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:33:08,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:08,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:33:08,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:08,743 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) [2021-07-09 17:33:08,871 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-09 17:33:09,045 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 17:33:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:09,056 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-07-09 17:33:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:33:09,057 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 [2021-07-09 17:33:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:09,058 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:33:09,058 INFO L226 Difference]: Without dead ends: 65 [2021-07-09 17:33:09,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:33:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-09 17:33:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-07-09 17:33:09,064 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) [2021-07-09 17:33:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-07-09 17:33:09,066 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-07-09 17:33:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:09,066 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-07-09 17:33:09,066 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) [2021-07-09 17:33:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-07-09 17:33:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:33:09,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:09,067 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:09,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:33:09,067 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash -392767192, now seen corresponding path program 3 times [2021-07-09 17:33:09,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:09,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713249557] [2021-07-09 17:33:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:09,440 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 212 [2021-07-09 17:33:09,907 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 44 [2021-07-09 17:33:10,291 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2021-07-09 17:33:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:10,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:10,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713249557] [2021-07-09 17:33:10,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713249557] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:10,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:10,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:33:10,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600227290] [2021-07-09 17:33:10,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:33:10,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:10,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:33:10,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:10,386 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) [2021-07-09 17:33:10,509 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 17:33:10,667 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-09 17:33:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:10,676 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-07-09 17:33:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:33:10,678 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 [2021-07-09 17:33:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:10,678 INFO L225 Difference]: With dead ends: 80 [2021-07-09 17:33:10,679 INFO L226 Difference]: Without dead ends: 54 [2021-07-09 17:33:10,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1070.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:33:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-09 17:33:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-07-09 17:33:10,682 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) [2021-07-09 17:33:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-07-09 17:33:10,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-07-09 17:33:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:10,683 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-07-09 17:33:10,683 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) [2021-07-09 17:33:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-07-09 17:33:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:33:10,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:10,684 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:10,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:33:10,685 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1324864438, now seen corresponding path program 4 times [2021-07-09 17:33:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:10,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487764421] [2021-07-09 17:33:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:13,251 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 534 DAG size of output: 292 [2021-07-09 17:33:13,421 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 264 [2021-07-09 17:33:14,332 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 54 [2021-07-09 17:33:14,593 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-07-09 17:33:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487764421] [2021-07-09 17:33:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487764421] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:14,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:14,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:33:14,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891301080] [2021-07-09 17:33:14,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:33:14,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:33:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:14,663 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) [2021-07-09 17:33:14,797 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 17:33:14,945 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 17:33:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:14,957 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-07-09 17:33:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:33:14,958 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 [2021-07-09 17:33:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:14,958 INFO L225 Difference]: With dead ends: 56 [2021-07-09 17:33:14,958 INFO L226 Difference]: Without dead ends: 33 [2021-07-09 17:33:14,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1428.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:33:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-07-09 17:33:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-07-09 17:33:14,961 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) [2021-07-09 17:33:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-07-09 17:33:14,963 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-07-09 17:33:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:14,963 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-07-09 17:33:14,963 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) [2021-07-09 17:33:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-07-09 17:33:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:33:14,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:14,964 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:14,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:33:14,964 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2000333238, now seen corresponding path program 5 times [2021-07-09 17:33:14,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:14,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373949935] [2021-07-09 17:33:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:15,247 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 147 [2021-07-09 17:33:15,473 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 43 [2021-07-09 17:33:15,577 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 134 [2021-07-09 17:33:16,026 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 75 [2021-07-09 17:33:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:16,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:16,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373949935] [2021-07-09 17:33:16,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373949935] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:16,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:16,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:33:16,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521998630] [2021-07-09 17:33:16,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:33:16,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:33:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:16,065 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) [2021-07-09 17:33:16,191 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 17:33:16,361 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 17:33:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:16,369 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-07-09 17:33:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:33:16,369 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 [2021-07-09 17:33:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:16,370 INFO L225 Difference]: With dead ends: 48 [2021-07-09 17:33:16,370 INFO L226 Difference]: Without dead ends: 27 [2021-07-09 17:33:16,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 964.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:33:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-07-09 17:33:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-07-09 17:33:16,372 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) [2021-07-09 17:33:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-07-09 17:33:16,373 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-07-09 17:33:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:16,373 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-07-09 17:33:16,373 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) [2021-07-09 17:33:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-07-09 17:33:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:33:16,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:16,373 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:16,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:33:16,374 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1966251176, now seen corresponding path program 6 times [2021-07-09 17:33:16,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:16,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273854862] [2021-07-09 17:33:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:24,455 WARN L205 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 415 DAG size of output: 441 [2021-07-09 17:33:25,143 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 398 [2021-07-09 17:33:26,163 WARN L205 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 48 [2021-07-09 17:33:26,333 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 52 [2021-07-09 17:33:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:26,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:26,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273854862] [2021-07-09 17:33:26,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273854862] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:33:26,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:33:26,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:33:26,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105251659] [2021-07-09 17:33:26,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:33:26,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:33:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:33:26,390 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) [2021-07-09 17:33:26,585 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 17:33:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:26,586 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-07-09 17:33:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:33:26,586 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 [2021-07-09 17:33:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:26,587 INFO L225 Difference]: With dead ends: 25 [2021-07-09 17:33:26,587 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 17:33:26,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1370.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:33:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 17:33:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 17:33:26,587 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) [2021-07-09 17:33:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 17:33:26,588 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-07-09 17:33:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:26,588 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 17:33:26,588 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) [2021-07-09 17:33:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 17:33:26,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:33:26,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:33:26,590 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:33:26,592 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:33:26 BasicIcfg [2021-07-09 17:33:26,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:33:26,593 INFO L168 Benchmark]: Toolchain (without parser) took 22117.31 ms. Allocated memory was 199.2 MB in the beginning and 716.2 MB in the end (delta: 516.9 MB). Free memory was 179.2 MB in the beginning and 364.6 MB in the end (delta: -185.4 MB). Peak memory consumption was 332.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:26,593 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 199.2 MB. Free memory was 180.3 MB in the beginning and 180.2 MB in the end (delta: 93.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:33:26,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.68 ms. Allocated memory is still 199.2 MB. Free memory was 179.1 MB in the beginning and 177.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:26,594 INFO L168 Benchmark]: Boogie Preprocessor took 16.40 ms. Allocated memory is still 199.2 MB. Free memory was 177.5 MB in the beginning and 176.6 MB in the end (delta: 919.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:26,594 INFO L168 Benchmark]: RCFGBuilder took 333.05 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 159.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:26,595 INFO L168 Benchmark]: TraceAbstraction took 21735.99 ms. Allocated memory was 199.2 MB in the beginning and 716.2 MB in the end (delta: 516.9 MB). Free memory was 158.8 MB in the beginning and 364.6 MB in the end (delta: -205.8 MB). Peak memory consumption was 311.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:33:26,596 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 0.13 ms. Allocated memory is still 199.2 MB. Free memory was 180.3 MB in the beginning and 180.2 MB in the end (delta: 93.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.68 ms. Allocated memory is still 199.2 MB. Free memory was 179.1 MB in the beginning and 177.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.40 ms. Allocated memory is still 199.2 MB. Free memory was 177.5 MB in the beginning and 176.6 MB in the end (delta: 919.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 333.05 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 159.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21735.99 ms. Allocated memory was 199.2 MB in the beginning and 716.2 MB in the end (delta: 516.9 MB). Free memory was 158.8 MB in the beginning and 364.6 MB in the end (delta: -205.8 MB). Peak memory consumption was 311.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21624.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 10.9ms, AutomataDifference: 2300.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 122.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6967.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred 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: 35.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.4ms SsaConstructionTime, 238.5ms SatisfiabilityAnalysisTime, 18868.5ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 4933 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...