/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:57:28,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:57:28,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:57:28,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:57:28,211 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 [2021-04-15 02:57:28,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:57:28,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:57:28,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:57:28,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:57:28,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:57:28,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:57:28,261 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:57:28,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:57:28,261 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:57:28,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:57:28,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:57:28,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:57:28,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:57:28,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:57:28,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:57:28,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:57:28,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:57:28,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:57:28,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:57:28,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:57:28,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:57:28,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:57:28,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:57:28,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:57:28,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:57:28,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:57:28,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:57:28,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:57:28,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:57:28,264 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:57:28,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:57:28,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:57:28,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:57:28,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:57:28,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:57:28,741 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:57:28,744 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:57:28,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl [2021-04-15 02:57:28,746 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl' [2021-04-15 02:57:28,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:57:28,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:57:28,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:57:28,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:57:28,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:57:28,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:57:28,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:57:28,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:57:28,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:57:28,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/1) ... [2021-04-15 02:57:28,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:57:28,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:57:28,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:57:28,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:57:28,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (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 [2021-04-15 02:57:28,915 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:57:28,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:57:28,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:57:28,915 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:57:28,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:57:28,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:57:28,915 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:57:28,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:57:28,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:57:28,916 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 02:57:28,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 02:57:28,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 02:57:28,917 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:57:29,130 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:57:29,130 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 02:57:29,132 INFO L202 PluginConnector]: Adding new model collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:57:29 BoogieIcfgContainer [2021-04-15 02:57:29,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:57:29,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:57:29,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:57:29,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:57:29,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:57:28" (1/2) ... [2021-04-15 02:57:29,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f361cd and model type collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:57:29, skipping insertion in model container [2021-04-15 02:57:29,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:57:29" (2/2) ... [2021-04-15 02:57:29,141 INFO L111 eAbstractionObserver]: Analyzing ICFG collitem-subst.wvr.bpl [2021-04-15 02:57:29,147 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:57:29,148 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:57:29,155 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:57:29,156 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:57:29,233 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 02:57:29,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 02:57:29,282 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:57:29,283 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:57:29,283 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:57:29,283 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:57:29,283 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:57:29,283 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:57:29,304 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:57:29,305 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:57:29,317 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-04-15 02:57:29,333 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:29,365 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:29,366 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:29,367 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1365396696, now seen corresponding path program 1 times [2021-04-15 02:57:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:29,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715432203] [2021-04-15 02:57:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:30,645 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-04-15 02:57:30,888 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 139 [2021-04-15 02:57:31,475 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 88 [2021-04-15 02:57:31,612 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2021-04-15 02:57:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:57:31,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715432203] [2021-04-15 02:57:31,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:31,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:31,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554535645] [2021-04-15 02:57:31,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:31,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:31,646 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:31,861 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:57:32,102 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-04-15 02:57:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:32,117 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-04-15 02:57:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:32,138 INFO L225 Difference]: With dead ends: 98 [2021-04-15 02:57:32,138 INFO L226 Difference]: Without dead ends: 72 [2021-04-15 02:57:32,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1417.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-04-15 02:57:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-04-15 02:57:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-04-15 02:57:32,203 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-04-15 02:57:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:57:32,205 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-04-15 02:57:32,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-04-15 02:57:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:32,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:32,209 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:32,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:57:32,210 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash -39432920, now seen corresponding path program 2 times [2021-04-15 02:57:32,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:32,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463325702] [2021-04-15 02:57:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:32,657 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-04-15 02:57:33,015 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 69 [2021-04-15 02:57:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:57:33,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463325702] [2021-04-15 02:57:33,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:33,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:33,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512982181] [2021-04-15 02:57:33,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:33,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:33,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:33,112 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:33,327 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-04-15 02:57:33,506 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-04-15 02:57:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:33,523 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-04-15 02:57:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:33,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:33,524 INFO L225 Difference]: With dead ends: 93 [2021-04-15 02:57:33,524 INFO L226 Difference]: Without dead ends: 65 [2021-04-15 02:57:33,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-04-15 02:57:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-04-15 02:57:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-04-15 02:57:33,532 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-04-15 02:57:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:57:33,532 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-04-15 02:57:33,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-04-15 02:57:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:33,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:33,534 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:33,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 02:57:33,535 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash -392767192, now seen corresponding path program 3 times [2021-04-15 02:57:33,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:33,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029663515] [2021-04-15 02:57:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:33,899 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 289 [2021-04-15 02:57:34,948 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 46 [2021-04-15 02:57:35,621 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 86 [2021-04-15 02:57:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:57:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029663515] [2021-04-15 02:57:35,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:35,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:35,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657873868] [2021-04-15 02:57:35,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:35,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:35,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:35,689 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:36,215 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 115 [2021-04-15 02:57:36,829 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2021-04-15 02:57:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:36,841 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-04-15 02:57:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:36,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:36,844 INFO L225 Difference]: With dead ends: 80 [2021-04-15 02:57:36,844 INFO L226 Difference]: Without dead ends: 54 [2021-04-15 02:57:36,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2737.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-04-15 02:57:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-04-15 02:57:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-04-15 02:57:36,849 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-04-15 02:57:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:57:36,850 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-04-15 02:57:36,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-04-15 02:57:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:36,851 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:36,851 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:36,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:57:36,851 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:36,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1324864438, now seen corresponding path program 4 times [2021-04-15 02:57:36,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:36,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405674108] [2021-04-15 02:57:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:37,398 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 45 [2021-04-15 02:57:37,552 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-04-15 02:57:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:57:37,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405674108] [2021-04-15 02:57:37,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:37,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:37,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885032234] [2021-04-15 02:57:37,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:37,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:37,616 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:37,763 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-04-15 02:57:37,939 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-04-15 02:57:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:37,961 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-04-15 02:57:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:37,963 INFO L225 Difference]: With dead ends: 56 [2021-04-15 02:57:37,963 INFO L226 Difference]: Without dead ends: 33 [2021-04-15 02:57:37,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 805.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-15 02:57:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-15 02:57:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-04-15 02:57:37,967 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-04-15 02:57:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:57:37,968 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-04-15 02:57:37,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-04-15 02:57:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:37,968 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:37,969 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:37,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:57:37,969 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2000333238, now seen corresponding path program 5 times [2021-04-15 02:57:37,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:37,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323076071] [2021-04-15 02:57:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:38,756 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 51 [2021-04-15 02:57:39,125 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2021-04-15 02:57:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:57:39,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323076071] [2021-04-15 02:57:39,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:39,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:39,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838872799] [2021-04-15 02:57:39,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:39,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:39,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:39,231 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:39,366 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-04-15 02:57:39,532 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-04-15 02:57:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:39,542 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-04-15 02:57:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:39,543 INFO L225 Difference]: With dead ends: 48 [2021-04-15 02:57:39,544 INFO L226 Difference]: Without dead ends: 27 [2021-04-15 02:57:39,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1241.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-15 02:57:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-04-15 02:57:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-04-15 02:57:39,548 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-04-15 02:57:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:57:39,548 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-04-15 02:57:39,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-04-15 02:57:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:57:39,549 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:57:39,549 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:57:39,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 02:57:39,549 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:57:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:57:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1966251176, now seen corresponding path program 6 times [2021-04-15 02:57:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:57:39,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896518382] [2021-04-15 02:57:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:57:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:57:40,052 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 331 [2021-04-15 02:57:40,158 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 280 [2021-04-15 02:57:41,096 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 53 [2021-04-15 02:57:41,520 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 68 [2021-04-15 02:57:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:57:41,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896518382] [2021-04-15 02:57:41,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:57:41,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:57:41,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933606670] [2021-04-15 02:57:41,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:57:41,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:57:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:57:41,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:57:41,598 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:41,860 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2021-04-15 02:57:42,163 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 121 [2021-04-15 02:57:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:57:42,165 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-04-15 02:57:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:57:42,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:57:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:57:42,166 INFO L225 Difference]: With dead ends: 25 [2021-04-15 02:57:42,166 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 02:57:42,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1950.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:57:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 02:57:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 02:57:42,167 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) [2021-04-15 02:57:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 02:57:42,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-04-15 02:57:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:57:42,168 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 02:57:42,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:57:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 02:57:42,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 02:57:42,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 02:57:42,173 INFO L202 PluginConnector]: Adding new model collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:57:42 BasicIcfg [2021-04-15 02:57:42,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:57:42,175 INFO L168 Benchmark]: Toolchain (without parser) took 13382.26 ms. Allocated memory was 255.9 MB in the beginning and 578.8 MB in the end (delta: 323.0 MB). Free memory was 236.4 MB in the beginning and 424.1 MB in the end (delta: -187.7 MB). Peak memory consumption was 137.9 MB. Max. memory is 16.0 GB. [2021-04-15 02:57:42,175 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 149.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:57:42,176 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.60 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-04-15 02:57:42,176 INFO L168 Benchmark]: Boogie Preprocessor took 15.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 947.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:57:42,176 INFO L168 Benchmark]: RCFGBuilder took 286.71 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 231.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.0 GB. [2021-04-15 02:57:42,177 INFO L168 Benchmark]: TraceAbstraction took 13039.89 ms. Allocated memory was 255.9 MB in the beginning and 578.8 MB in the end (delta: 323.0 MB). Free memory was 230.6 MB in the beginning and 424.1 MB in the end (delta: -193.5 MB). Peak memory consumption was 128.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:57:42,179 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 0.25 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 149.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.60 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.0 MB in the end (delta: 947.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 286.71 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 231.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 13039.89 ms. Allocated memory was 255.9 MB in the beginning and 578.8 MB in the end (delta: 323.0 MB). Free memory was 230.6 MB in the beginning and 424.1 MB in the end (delta: -193.5 MB). Peak memory consumption was 128.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12889.4ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 34.8ms, AutomataDifference: 3325.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 179.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9035.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 65.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.6ms SsaConstructionTime, 379.1ms SatisfiabilityAnalysisTime, 8776.0ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 5587 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...