/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-decr07.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8b99979fc9bd30b823d307a67cb055caa4790482-8b99979 [2021-06-30 11:59:58,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-30 11:59:58,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-30 11:59:58,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-30 11:59:58,120 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 11:59:58,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-30 11:59:58,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-30 11:59:58,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-30 11:59:58,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-30 11:59:58,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-30 11:59:58,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-30 11:59:58,144 INFO L138 SettingsManager]: * Use SBE=true [2021-06-30 11:59:58,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-30 11:59:58,145 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-30 11:59:58,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-30 11:59:58,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-30 11:59:58,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-30 11:59:58,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-30 11:59:58,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:59:58,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-30 11:59:58,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-30 11:59:58,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-30 11:59:58,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-30 11:59:58,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-30 11:59:58,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-30 11:59:58,404 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-30 11:59:58,405 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-30 11:59:58,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr07.bpl [2021-06-30 11:59:58,406 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr07.bpl' [2021-06-30 11:59:58,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-30 11:59:58,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-30 11:59:58,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-30 11:59:58,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-30 11:59:58,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-30 11:59:58,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-30 11:59:58,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-30 11:59:58,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-30 11:59:58,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-30 11:59:58,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/1) ... [2021-06-30 11:59:58,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-30 11:59:58,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-30 11:59:58,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-30 11:59:58,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-30 11:59:58,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (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 11:59:58,527 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-30 11:59:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-30 11:59:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-30 11:59:58,527 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-06-30 11:59:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-06-30 11:59:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-06-30 11:59:58,528 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 11:59:58,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-30 11:59:58,616 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-30 11:59:58,617 INFO L202 PluginConnector]: Adding new model incr-decr07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:59:58 BoogieIcfgContainer [2021-06-30 11:59:58,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-30 11:59:58,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-30 11:59:58,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-30 11:59:58,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-30 11:59:58,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:58" (1/2) ... [2021-06-30 11:59:58,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbe107e and model type incr-decr07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.06 11:59:58, skipping insertion in model container [2021-06-30 11:59:58,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 11:59:58" (2/2) ... [2021-06-30 11:59:58,623 INFO L111 eAbstractionObserver]: Analyzing ICFG incr-decr07.bpl [2021-06-30 11:59:58,626 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-30 11:59:58,626 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-30 11:59:58,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-30 11:59:58,627 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-30 11:59:58,715 INFO L149 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2021-06-30 11:59:58,739 INFO L255 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-06-30 11:59:58,752 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-30 11:59:58,768 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-30 11:59:58,769 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-30 11:59:58,769 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-30 11:59:58,769 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-30 11:59:58,769 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-30 11:59:58,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-30 11:59:58,769 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-30 11:59:58,778 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 46 transitions, 148 flow [2021-06-30 11:59:59,182 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4377 states, 4374 states have (on average 6.750571559213535) internal successors, (29527), 4374 states have internal predecessors, (29527), 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 11:59:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 4377 states, 4374 states have (on average 6.750571559213535) internal successors, (29527), 4374 states have internal predecessors, (29527), 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 11:59:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-30 11:59:59,255 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 11:59:59,255 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 11:59:59,256 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 11:59:59,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 11:59:59,262 INFO L82 PathProgramCache]: Analyzing trace with hash 963978406, now seen corresponding path program 1 times [2021-06-30 11:59:59,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 11:59:59,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577635650] [2021-06-30 11:59:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 11:59:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 11:59:59,417 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 11:59:59,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 11:59:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577635650] [2021-06-30 11:59:59,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577635650] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 11:59:59,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 11:59:59,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-30 11:59:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948775983] [2021-06-30 11:59:59,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-30 11:59:59,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 11:59:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-30 11:59:59,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:59:59,445 INFO L87 Difference]: Start difference. First operand has 4377 states, 4374 states have (on average 6.750571559213535) internal successors, (29527), 4374 states have internal predecessors, (29527), 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 11.5) internal successors, (23), 2 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 11:59:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 11:59:59,566 INFO L93 Difference]: Finished difference Result 4756 states and 31960 transitions. [2021-06-30 11:59:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-30 11:59:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 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 11:59:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 11:59:59,660 INFO L225 Difference]: With dead ends: 4756 [2021-06-30 11:59:59,660 INFO L226 Difference]: Without dead ends: 4748 [2021-06-30 11:59:59,663 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 11:59:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-06-30 11:59:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 4748. [2021-06-30 11:59:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4747 states have (on average 6.725300189593427) internal successors, (31925), 4747 states have internal predecessors, (31925), 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 12:00:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 31925 transitions. [2021-06-30 12:00:00,053 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 31925 transitions. Word has length 23 [2021-06-30 12:00:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:00,054 INFO L482 AbstractCegarLoop]: Abstraction has 4748 states and 31925 transitions. [2021-06-30 12:00:00,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 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 12:00:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 31925 transitions. [2021-06-30 12:00:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-30 12:00:00,079 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:00,079 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 12:00:00,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-30 12:00:00,079 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1880055900, now seen corresponding path program 1 times [2021-06-30 12:00:00,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:00,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953193610] [2021-06-30 12:00:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:00,172 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 12:00:00,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:00,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953193610] [2021-06-30 12:00:00,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953193610] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:00:00,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:00:00,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 12:00:00,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910175590] [2021-06-30 12:00:00,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 12:00:00,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:00,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 12:00:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 12:00:00,174 INFO L87 Difference]: Start difference. First operand 4748 states and 31925 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 12:00:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:00,358 INFO L93 Difference]: Finished difference Result 6216 states and 41580 transitions. [2021-06-30 12:00:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 12:00:00,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 12:00:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:00,419 INFO L225 Difference]: With dead ends: 6216 [2021-06-30 12:00:00,420 INFO L226 Difference]: Without dead ends: 6122 [2021-06-30 12:00:00,420 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 12:00:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2021-06-30 12:00:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 5778. [2021-06-30 12:00:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5778 states, 5777 states have (on average 6.7194045352258955) internal successors, (38818), 5777 states have internal predecessors, (38818), 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 12:00:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 38818 transitions. [2021-06-30 12:00:00,852 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 38818 transitions. Word has length 25 [2021-06-30 12:00:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:00,852 INFO L482 AbstractCegarLoop]: Abstraction has 5778 states and 38818 transitions. [2021-06-30 12:00:00,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 12:00:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 38818 transitions. [2021-06-30 12:00:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-30 12:00:00,873 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:00,873 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 12:00:00,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-30 12:00:00,873 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:00,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386296, now seen corresponding path program 1 times [2021-06-30 12:00:00,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:00,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647712195] [2021-06-30 12:00:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:00,950 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 12:00:00,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:00,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647712195] [2021-06-30 12:00:00,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647712195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:00,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519064562] [2021-06-30 12:00:00,951 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 12:00:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 12:00:01,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:01,119 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 12:00:01,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519064562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:01,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:01,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-30 12:00:01,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984468528] [2021-06-30 12:00:01,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 12:00:01,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 12:00:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 12:00:01,121 INFO L87 Difference]: Start difference. First operand 5778 states and 38818 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 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 12:00:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:01,304 INFO L93 Difference]: Finished difference Result 8611 states and 57764 transitions. [2021-06-30 12:00:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 12:00:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 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 12:00:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:01,349 INFO L225 Difference]: With dead ends: 8611 [2021-06-30 12:00:01,349 INFO L226 Difference]: Without dead ends: 8128 [2021-06-30 12:00:01,350 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 12:00:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8128 states. [2021-06-30 12:00:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8128 to 6906. [2021-06-30 12:00:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6906 states, 6905 states have (on average 6.747429398986242) internal successors, (46591), 6905 states have internal predecessors, (46591), 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 12:00:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6906 states to 6906 states and 46591 transitions. [2021-06-30 12:00:01,957 INFO L78 Accepts]: Start accepts. Automaton has 6906 states and 46591 transitions. Word has length 27 [2021-06-30 12:00:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:01,958 INFO L482 AbstractCegarLoop]: Abstraction has 6906 states and 46591 transitions. [2021-06-30 12:00:01,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 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 12:00:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6906 states and 46591 transitions. [2021-06-30 12:00:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 12:00:01,982 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:01,982 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, 1, 1] [2021-06-30 12:00:02,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-30 12:00:02,306 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash -835670358, now seen corresponding path program 1 times [2021-06-30 12:00:02,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:02,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005944938] [2021-06-30 12:00:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:02,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005944938] [2021-06-30 12:00:02,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005944938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:02,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705124961] [2021-06-30 12:00:02,361 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 12:00:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:02,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 12:00:02,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:02,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705124961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:02,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:02,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 12:00:02,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637766546] [2021-06-30 12:00:02,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 12:00:02,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:02,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 12:00:02,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 12:00:02,462 INFO L87 Difference]: Start difference. First operand 6906 states and 46591 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:00:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:02,725 INFO L93 Difference]: Finished difference Result 10690 states and 72157 transitions. [2021-06-30 12:00:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 12:00:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 29 [2021-06-30 12:00:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:02,828 INFO L225 Difference]: With dead ends: 10690 [2021-06-30 12:00:02,828 INFO L226 Difference]: Without dead ends: 9196 [2021-06-30 12:00:02,829 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 12:00:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-06-30 12:00:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7226. [2021-06-30 12:00:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7226 states, 7225 states have (on average 6.77840830449827) internal successors, (48974), 7225 states have internal predecessors, (48974), 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 12:00:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7226 states to 7226 states and 48974 transitions. [2021-06-30 12:00:03,302 INFO L78 Accepts]: Start accepts. Automaton has 7226 states and 48974 transitions. Word has length 29 [2021-06-30 12:00:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:03,302 INFO L482 AbstractCegarLoop]: Abstraction has 7226 states and 48974 transitions. [2021-06-30 12:00:03,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:00:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7226 states and 48974 transitions. [2021-06-30 12:00:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-30 12:00:03,340 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:03,340 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, 1, 1, 1, 1] [2021-06-30 12:00:03,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:03,558 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash -903915668, now seen corresponding path program 1 times [2021-06-30 12:00:03,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:03,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355516931] [2021-06-30 12:00:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:03,658 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 12:00:03,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:03,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355516931] [2021-06-30 12:00:03,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355516931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:03,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998994698] [2021-06-30 12:00:03,659 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 12:00:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 12:00:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:03,886 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 12:00:03,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998994698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:03,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:03,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 12:00:03,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842635877] [2021-06-30 12:00:03,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 12:00:03,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 12:00:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 12:00:03,888 INFO L87 Difference]: Start difference. First operand 7226 states and 48974 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 12:00:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:04,202 INFO L93 Difference]: Finished difference Result 11351 states and 77065 transitions. [2021-06-30 12:00:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 12:00:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 31 [2021-06-30 12:00:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:04,359 INFO L225 Difference]: With dead ends: 11351 [2021-06-30 12:00:04,359 INFO L226 Difference]: Without dead ends: 8265 [2021-06-30 12:00:04,359 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 12:00:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-06-30 12:00:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 6462. [2021-06-30 12:00:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6462 states, 6461 states have (on average 6.8000309549605324) internal successors, (43935), 6461 states have internal predecessors, (43935), 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 12:00:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 43935 transitions. [2021-06-30 12:00:04,701 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 43935 transitions. Word has length 31 [2021-06-30 12:00:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:04,701 INFO L482 AbstractCegarLoop]: Abstraction has 6462 states and 43935 transitions. [2021-06-30 12:00:04,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 12:00:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 43935 transitions. [2021-06-30 12:00:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-30 12:00:04,796 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:04,797 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, 1, 1, 1, 1, 1, 1] [2021-06-30 12:00:04,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:04,997 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash -703652786, now seen corresponding path program 1 times [2021-06-30 12:00:04,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:04,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907682713] [2021-06-30 12:00:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:05,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:05,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907682713] [2021-06-30 12:00:05,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907682713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:05,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962146430] [2021-06-30 12:00:05,061 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 12:00:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-30 12:00:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:05,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962146430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:05,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:05,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 12:00:05,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325868231] [2021-06-30 12:00:05,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 12:00:05,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 12:00:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 12:00:05,170 INFO L87 Difference]: Start difference. First operand 6462 states and 43935 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 12:00:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:05,484 INFO L93 Difference]: Finished difference Result 10454 states and 71336 transitions. [2021-06-30 12:00:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 12:00:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 33 [2021-06-30 12:00:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:05,516 INFO L225 Difference]: With dead ends: 10454 [2021-06-30 12:00:05,516 INFO L226 Difference]: Without dead ends: 5991 [2021-06-30 12:00:05,517 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 12:00:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2021-06-30 12:00:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 5082. [2021-06-30 12:00:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5082 states, 5081 states have (on average 6.828970675063964) internal successors, (34698), 5081 states have internal predecessors, (34698), 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 12:00:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 34698 transitions. [2021-06-30 12:00:05,853 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 34698 transitions. Word has length 33 [2021-06-30 12:00:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:05,853 INFO L482 AbstractCegarLoop]: Abstraction has 5082 states and 34698 transitions. [2021-06-30 12:00:05,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 12:00:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 34698 transitions. [2021-06-30 12:00:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-30 12:00:05,868 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:05,868 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:00:06,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:06,090 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:06,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1046588132, now seen corresponding path program 1 times [2021-06-30 12:00:06,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:06,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089981217] [2021-06-30 12:00:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:06,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:06,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089981217] [2021-06-30 12:00:06,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089981217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:06,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816839176] [2021-06-30 12:00:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-30 12:00:06,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:06,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816839176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:06,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:06,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-30 12:00:06,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961941867] [2021-06-30 12:00:06,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-30 12:00:06,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:06,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-30 12:00:06,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 12:00:06,287 INFO L87 Difference]: Start difference. First operand 5082 states and 34698 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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 12:00:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:06,842 INFO L93 Difference]: Finished difference Result 8361 states and 57108 transitions. [2021-06-30 12:00:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-30 12:00:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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 35 [2021-06-30 12:00:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:06,866 INFO L225 Difference]: With dead ends: 8361 [2021-06-30 12:00:06,867 INFO L226 Difference]: Without dead ends: 3719 [2021-06-30 12:00:06,867 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 12:00:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-30 12:00:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3536. [2021-06-30 12:00:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 3535 states have (on average 6.811032531824611) internal successors, (24077), 3535 states have internal predecessors, (24077), 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 12:00:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 24077 transitions. [2021-06-30 12:00:07,016 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 24077 transitions. Word has length 35 [2021-06-30 12:00:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:07,016 INFO L482 AbstractCegarLoop]: Abstraction has 3536 states and 24077 transitions. [2021-06-30 12:00:07,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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 12:00:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 24077 transitions. [2021-06-30 12:00:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-30 12:00:07,026 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:07,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:00:07,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-30 12:00:07,241 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:07,241 INFO L82 PathProgramCache]: Analyzing trace with hash -859590486, now seen corresponding path program 1 times [2021-06-30 12:00:07,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:07,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265214883] [2021-06-30 12:00:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:00:07,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:07,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265214883] [2021-06-30 12:00:07,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265214883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:07,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170901334] [2021-06-30 12:00:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-30 12:00:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:00:07,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170901334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:07,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:07,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-30 12:00:07,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006031914] [2021-06-30 12:00:07,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-30 12:00:07,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:07,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-30 12:00:07,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-30 12:00:07,441 INFO L87 Difference]: Start difference. First operand 3536 states and 24077 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 12:00:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:07,830 INFO L93 Difference]: Finished difference Result 3535 states and 24076 transitions. [2021-06-30 12:00:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-30 12:00:07,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 37 [2021-06-30 12:00:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:07,831 INFO L225 Difference]: With dead ends: 3535 [2021-06-30 12:00:07,831 INFO L226 Difference]: Without dead ends: 0 [2021-06-30 12:00:07,831 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-30 12:00:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-30 12:00:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-30 12:00:07,831 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 12:00:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-30 12:00:07,832 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-06-30 12:00:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:07,832 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-30 12:00:07,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 12:00:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-30 12:00:07,832 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-30 12:00:08,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:08,036 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-30 12:00:08,038 INFO L202 PluginConnector]: Adding new model incr-decr07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.06 12:00:08 BasicIcfg [2021-06-30 12:00:08,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-30 12:00:08,038 INFO L168 Benchmark]: Toolchain (without parser) took 9613.29 ms. Allocated memory was 164.6 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 145.5 MB in the beginning and 2.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 644.7 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:08,038 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 164.6 MB. Free memory is still 146.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-30 12:00:08,038 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.02 ms. Allocated memory is still 164.6 MB. Free memory was 145.4 MB in the beginning and 143.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:08,038 INFO L168 Benchmark]: Boogie Preprocessor took 12.00 ms. Allocated memory is still 164.6 MB. Free memory was 143.9 MB in the beginning and 142.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:08,038 INFO L168 Benchmark]: RCFGBuilder took 148.31 ms. Allocated memory is still 164.6 MB. Free memory was 142.9 MB in the beginning and 133.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:08,039 INFO L168 Benchmark]: TraceAbstraction took 9418.92 ms. Allocated memory was 164.6 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 133.2 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 632.1 MB. Max. memory is 8.0 GB. [2021-06-30 12:00:08,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 164.6 MB. Free memory is still 146.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 30.02 ms. Allocated memory is still 164.6 MB. Free memory was 145.4 MB in the beginning and 143.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.00 ms. Allocated memory is still 164.6 MB. Free memory was 143.9 MB in the beginning and 142.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 148.31 ms. Allocated memory is still 164.6 MB. Free memory was 142.9 MB in the beginning and 133.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9418.92 ms. Allocated memory was 164.6 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 133.2 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 632.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 24]: 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 9 procedures, 50 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9283.8ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 298.0ms, AutomataDifference: 2874.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 412.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 603 SDtfs, 413 SDslu, 2581 SDs, 0 SdLazy, 2667 SolverSat, 336 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1111.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 201 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 242.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7226occurred in iteration=4, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2704.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 6431 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.8ms SsaConstructionTime, 182.5ms SatisfiabilityAnalysisTime, 948.5ms InterpolantComputationTime, 432 NumberOfCodeBlocks, 432 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 418 ConstructedInterpolants, 0 QuantifiedInterpolants, 2838 SizeOfPredicates, 0 NumberOfNonLiveVariables, 852 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 7/55 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...