/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/POPL2022/incr-decr05.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8b99979fc9bd30b823d307a67cb055caa4790482-8b99979 [2021-06-30 11:59:57,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-30 11:59:57,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-30 11:59:57,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-30 11:59:57,233 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 [2021-06-30 11:59:57,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-30 11:59:57,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-30 11:59:57,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-30 11:59:57,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-30 11:59:57,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-30 11:59:57,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-30 11:59:57,287 INFO L138 SettingsManager]: * Use SBE=true [2021-06-30 11:59:57,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-30 11:59:57,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-30 11:59:57,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-30 11:59:57,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-30 11:59:57,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-30 11:59:57,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-30 11:59:57,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-30 11:59:57,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-30 11:59:57,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-30 11:59:57,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-30 11:59:57,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-30 11:59:57,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-30 11:59:57,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:59:57,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-30 11:59:57,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-30 11:59:57,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-30 11:59:57,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-30 11:59:57,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-30 11:59:57,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-30 11:59:57,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-30 11:59:57,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-30 11:59:57,571 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-30 11:59:57,571 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-30 11:59:57,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr05.bpl [2021-06-30 11:59:57,660 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr05.bpl' [2021-06-30 11:59:57,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-30 11:59:57,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-30 11:59:57,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-30 11:59:57,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-30 11:59:57,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-30 11:59:57,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-30 11:59:57,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-30 11:59:57,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-30 11:59:57,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-30 11:59:57,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/1) ... [2021-06-30 11:59:57,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-30 11:59:57,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-30 11:59:57,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-30 11:59:57,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-30 11:59:57,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (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 [2021-06-30 11:59:57,819 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-30 11:59:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-30 11:59:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-30 11:59:57,820 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-06-30 11:59:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-06-30 11:59:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-06-30 11:59:57,821 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-30 11:59:57,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-30 11:59:57,919 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-30 11:59:57,920 INFO L202 PluginConnector]: Adding new model incr-decr05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:59:57 BoogieIcfgContainer [2021-06-30 11:59:57,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-30 11:59:57,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-30 11:59:57,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-30 11:59:57,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-30 11:59:57,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:57" (1/2) ... [2021-06-30 11:59:57,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a044e8 and model type incr-decr05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.06 11:59:57, skipping insertion in model container [2021-06-30 11:59:57,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:59:57" (2/2) ... [2021-06-30 11:59:57,926 INFO L111 eAbstractionObserver]: Analyzing ICFG incr-decr05.bpl [2021-06-30 11:59:57,933 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-30 11:59:57,933 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-30 11:59:57,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-30 11:59:57,934 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-30 11:59:58,033 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-30 11:59:58,048 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-30 11:59:58,083 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-30 11:59:58,083 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-30 11:59:58,084 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-30 11:59:58,084 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-30 11:59:58,084 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-30 11:59:58,084 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-30 11:59:58,084 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-30 11:59:58,084 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-30 11:59:58,095 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 34 transitions, 108 flow [2021-06-30 11:59:58,151 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 489 states, 486 states have (on average 4.755144032921811) internal successors, (2311), 486 states have internal predecessors, (2311), 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) [2021-06-30 11:59:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 489 states, 486 states have (on average 4.755144032921811) internal successors, (2311), 486 states have internal predecessors, (2311), 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) [2021-06-30 11:59:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-30 11:59:58,172 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:59:58,173 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:59:58,173 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:59:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:59:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2060279803, now seen corresponding path program 1 times [2021-06-30 11:59:58,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:59:58,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635782881] [2021-06-30 11:59:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:59:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:59:58,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:59:58,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635782881] [2021-06-30 11:59:58,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635782881] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:59:58,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:59:58,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-30 11:59:58,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578309839] [2021-06-30 11:59:58,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-30 11:59:58,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:59:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-30 11:59:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:59:58,369 INFO L87 Difference]: Start difference. First operand has 489 states, 486 states have (on average 4.755144032921811) internal successors, (2311), 486 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-06-30 11:59:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:59:58,433 INFO L93 Difference]: Finished difference Result 580 states and 2728 transitions. [2021-06-30 11:59:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-30 11:59:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2021-06-30 11:59:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:59:58,456 INFO L225 Difference]: With dead ends: 580 [2021-06-30 11:59:58,457 INFO L226 Difference]: Without dead ends: 574 [2021-06-30 11:59:58,458 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:59:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-30 11:59:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-06-30 11:59:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 4.726003490401396) internal successors, (2708), 573 states have internal predecessors, (2708), 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) [2021-06-30 11:59:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 2708 transitions. [2021-06-30 11:59:58,527 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 2708 transitions. Word has length 17 [2021-06-30 11:59:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:59:58,528 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 2708 transitions. [2021-06-30 11:59:58,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-06-30 11:59:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 2708 transitions. [2021-06-30 11:59:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-30 11:59:58,533 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:59:58,533 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:59:58,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-30 11:59:58,534 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:59:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:59:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1540424217, now seen corresponding path program 1 times [2021-06-30 11:59:58,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:59:58,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624630995] [2021-06-30 11:59:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:59:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:59:58,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:59:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624630995] [2021-06-30 11:59:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624630995] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:59:58,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:59:58,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 11:59:58,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001102403] [2021-06-30 11:59:58,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 11:59:58,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:59:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 11:59:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:59:58,600 INFO L87 Difference]: Start difference. First operand 574 states and 2708 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:59:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:59:58,643 INFO L93 Difference]: Finished difference Result 842 states and 3963 transitions. [2021-06-30 11:59:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 11:59:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-30 11:59:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:59:58,649 INFO L225 Difference]: With dead ends: 842 [2021-06-30 11:59:58,649 INFO L226 Difference]: Without dead ends: 789 [2021-06-30 11:59:58,650 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 11:59:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-30 11:59:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 718. [2021-06-30 11:59:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 4.7573221757322175) internal successors, (3411), 717 states have internal predecessors, (3411), 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) [2021-06-30 11:59:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 3411 transitions. [2021-06-30 11:59:58,687 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 3411 transitions. Word has length 19 [2021-06-30 11:59:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:59:58,687 INFO L482 AbstractCegarLoop]: Abstraction has 718 states and 3411 transitions. [2021-06-30 11:59:58,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:59:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 3411 transitions. [2021-06-30 11:59:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-30 11:59:58,690 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:59:58,690 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:59:58,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-30 11:59:58,690 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:59:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:59:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2034642949, now seen corresponding path program 1 times [2021-06-30 11:59:58,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:59:58,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159286484] [2021-06-30 11:59:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:59:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:59:58,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:59:58,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159286484] [2021-06-30 11:59:58,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159286484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:59:58,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426224338] [2021-06-30 11:59:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:59:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:58,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 11:59:58,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:59:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 11:59:58,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426224338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:59:58,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:59:58,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-30 11:59:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258710919] [2021-06-30 11:59:58,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 11:59:58,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:59:58,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 11:59:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:59:58,894 INFO L87 Difference]: Start difference. First operand 718 states and 3411 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:59:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:59:58,957 INFO L93 Difference]: Finished difference Result 1119 states and 5333 transitions. [2021-06-30 11:59:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 11:59:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-30 11:59:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:59:58,963 INFO L225 Difference]: With dead ends: 1119 [2021-06-30 11:59:58,964 INFO L226 Difference]: Without dead ends: 924 [2021-06-30 11:59:58,964 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 11:59:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-30 11:59:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 762. [2021-06-30 11:59:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 4.8015768725361365) internal successors, (3654), 761 states have internal predecessors, (3654), 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) [2021-06-30 11:59:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 3654 transitions. [2021-06-30 11:59:59,032 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 3654 transitions. Word has length 21 [2021-06-30 11:59:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:59:59,032 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 3654 transitions. [2021-06-30 11:59:59,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 11:59:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 3654 transitions. [2021-06-30 11:59:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:59:59,034 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:59:59,034 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:59:59,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-30 11:59:59,245 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:59:59,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:59:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 51607433, now seen corresponding path program 1 times [2021-06-30 11:59:59,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:59:59,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674227311] [2021-06-30 11:59:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:59:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:59:59,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:59:59,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674227311] [2021-06-30 11:59:59,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674227311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:59:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739662713] [2021-06-30 11:59:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:59:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 11:59:59,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 11:59:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 11:59:59,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739662713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:59:59,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 11:59:59,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 11:59:59,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894946968] [2021-06-30 11:59:59,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 11:59:59,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:59:59,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 11:59:59,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:59:59,438 INFO L87 Difference]: Start difference. First operand 762 states and 3654 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-06-30 11:59:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:59:59,616 INFO L93 Difference]: Finished difference Result 1194 states and 5756 transitions. [2021-06-30 11:59:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 11:59:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 23 [2021-06-30 11:59:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:59:59,622 INFO L225 Difference]: With dead ends: 1194 [2021-06-30 11:59:59,622 INFO L226 Difference]: Without dead ends: 782 [2021-06-30 11:59:59,622 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 11:59:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-30 11:59:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 642. [2021-06-30 11:59:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 4.828393135725429) internal successors, (3095), 641 states have internal predecessors, (3095), 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) [2021-06-30 11:59:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 3095 transitions. [2021-06-30 11:59:59,646 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 3095 transitions. Word has length 23 [2021-06-30 11:59:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 11:59:59,646 INFO L482 AbstractCegarLoop]: Abstraction has 642 states and 3095 transitions. [2021-06-30 11:59:59,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2021-06-30 11:59:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 3095 transitions. [2021-06-30 11:59:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-30 11:59:59,649 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:59:59,649 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 11:59:59,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:59:59,866 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:59:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:59:59,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2054548907, now seen corresponding path program 1 times [2021-06-30 11:59:59,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:59:59,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7958252] [2021-06-30 11:59:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:59:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 11:59:59,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:59:59,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7958252] [2021-06-30 11:59:59,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7958252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 11:59:59,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430971799] [2021-06-30 11:59:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 11:59:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:59,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 11:59:59,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:00:00,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430971799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:00,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:00,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 12:00:00,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544133134] [2021-06-30 12:00:00,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 12:00:00,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:00,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 12:00:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 12:00:00,058 INFO L87 Difference]: Start difference. First operand 642 states and 3095 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:00,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:00,226 INFO L93 Difference]: Finished difference Result 1005 states and 4852 transitions. [2021-06-30 12:00:00,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 12:00:00,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-30 12:00:00,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:00,230 INFO L225 Difference]: With dead ends: 1005 [2021-06-30 12:00:00,230 INFO L226 Difference]: Without dead ends: 469 [2021-06-30 12:00:00,230 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 12:00:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-30 12:00:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 428. [2021-06-30 12:00:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 4.796252927400468) internal successors, (2048), 427 states have internal predecessors, (2048), 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) [2021-06-30 12:00:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 2048 transitions. [2021-06-30 12:00:00,246 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 2048 transitions. Word has length 25 [2021-06-30 12:00:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:00,246 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 2048 transitions. [2021-06-30 12:00:00,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 2048 transitions. [2021-06-30 12:00:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-30 12:00:00,250 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:00,250 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:00:00,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:00,457 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:00,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1250830057, now seen corresponding path program 1 times [2021-06-30 12:00:00,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:00,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338161035] [2021-06-30 12:00:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:00:00,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338161035] [2021-06-30 12:00:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338161035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912051642] [2021-06-30 12:00:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-30 12:00:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:00:00,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912051642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:00,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:00,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 12:00:00,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834213934] [2021-06-30 12:00:00,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 12:00:00,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:00,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 12:00:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 12:00:00,674 INFO L87 Difference]: Start difference. First operand 428 states and 2048 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-06-30 12:00:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:00,819 INFO L93 Difference]: Finished difference Result 427 states and 2047 transitions. [2021-06-30 12:00:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 12:00:00,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 27 [2021-06-30 12:00:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:00,820 INFO L225 Difference]: With dead ends: 427 [2021-06-30 12:00:00,820 INFO L226 Difference]: Without dead ends: 0 [2021-06-30 12:00:00,821 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 12:00:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-30 12:00:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-30 12:00:00,821 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) [2021-06-30 12:00:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-30 12:00:00,821 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-06-30 12:00:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-30 12:00:00,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-06-30 12:00:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-30 12:00:00,823 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-30 12:00:01,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:01,039 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-30 12:00:01,040 INFO L202 PluginConnector]: Adding new model incr-decr05.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.06 12:00:01 BasicIcfg [2021-06-30 12:00:01,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-30 12:00:01,041 INFO L168 Benchmark]: Toolchain (without parser) took 3364.37 ms. Allocated memory was 189.8 MB in the beginning and 281.0 MB in the end (delta: 91.2 MB). Free memory was 170.2 MB in the beginning and 218.0 MB in the end (delta: -47.8 MB). Peak memory consumption was 45.0 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:01,041 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 171.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-30 12:00:01,041 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.88 ms. Allocated memory is still 189.8 MB. Free memory was 170.2 MB in the beginning and 168.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:01,041 INFO L168 Benchmark]: Boogie Preprocessor took 11.43 ms. Allocated memory is still 189.8 MB. Free memory was 168.8 MB in the beginning and 167.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:01,041 INFO L168 Benchmark]: RCFGBuilder took 194.46 ms. Allocated memory is still 189.8 MB. Free memory was 167.7 MB in the beginning and 158.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:01,042 INFO L168 Benchmark]: TraceAbstraction took 3118.93 ms. Allocated memory was 189.8 MB in the beginning and 281.0 MB in the end (delta: 91.2 MB). Free memory was 157.8 MB in the beginning and 218.0 MB in the end (delta: -60.2 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:01,042 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 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 171.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.88 ms. Allocated memory is still 189.8 MB. Free memory was 170.2 MB in the beginning and 168.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.43 ms. Allocated memory is still 189.8 MB. Free memory was 168.8 MB in the beginning and 167.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 194.46 ms. Allocated memory is still 189.8 MB. Free memory was 167.7 MB in the beginning and 158.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3118.93 ms. Allocated memory was 189.8 MB in the beginning and 281.0 MB in the end (delta: 91.2 MB). Free memory was 157.8 MB in the beginning and 218.0 MB in the end (delta: -60.2 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: 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, 38 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2955.6ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 35.8ms, AutomataDifference: 728.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 256 SDtfs, 150 SDslu, 763 SDs, 0 SdLazy, 840 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 422.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=762occurred in iteration=3, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 205.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 414 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 50.2ms SsaConstructionTime, 91.9ms SatisfiabilityAnalysisTime, 731.6ms InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 218 ConstructedInterpolants, 0 QuantifiedInterpolants, 1462 SizeOfPredicates, 0 NumberOfNonLiveVariables, 336 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 11/29 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...