/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:22:02,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:22:02,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:22:02,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:22:02,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:22:02,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:22:02,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:22:02,429 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-Separate.epf [2021-05-22 02:22:02,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:22:02,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:22:02,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:22:02,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:22:02,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:22:02,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:22:02,468 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:22:02,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:22:02,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:22:02,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:22:02,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:22:02,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:22:02,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:22:02,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:22:02,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:22:02,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:22:02,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:22:02,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:22:02,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:22:02,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:22:02,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:22:02,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:22:02,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:22:02,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:22:02,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:22:02,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:22:02,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:22:02,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:22:02,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:22:02,471 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:22:02,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:22:02,472 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:22:02,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:22:02,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:22:02,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:22:02,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:22:02,815 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:22:02,816 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:22:02,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl [2021-05-22 02:22:02,817 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/match-subst.wvr.bpl' [2021-05-22 02:22:02,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:22:02,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:22:02,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:02,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:22:02,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:22:02,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:02,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:22:02,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:22:02,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:22:02,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... [2021-05-22 02:22:02,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:22:02,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:22:02,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:22:02,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:22:02,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:22:02,977 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:22:02,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:22:02,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:22:02,978 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:22:02,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:22:02,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:22:02,978 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:22:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:22:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:22:02,979 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:22:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:22:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:22:02,980 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:22:03,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:22:03,165 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:22:03,167 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:03 BoogieIcfgContainer [2021-05-22 02:22:03,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:22:03,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:22:03,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:22:03,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:22:03,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:02" (1/2) ... [2021-05-22 02:22:03,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46605d8b and model type match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:22:03, skipping insertion in model container [2021-05-22 02:22:03,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:03" (2/2) ... [2021-05-22 02:22:03,173 INFO L111 eAbstractionObserver]: Analyzing ICFG match-subst.wvr.bpl [2021-05-22 02:22:03,178 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:22:03,178 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:22:03,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:22:03,179 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:22:03,209 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:22:03,228 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:22:03,244 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:22:03,244 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:22:03,245 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:22:03,245 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:22:03,245 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:22:03,245 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:22:03,245 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:22:03,245 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:22:03,253 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-05-22 02:22:03,265 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:03,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:03,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:03,288 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:03,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:03,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1166045766, now seen corresponding path program 1 times [2021-05-22 02:22:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:03,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643187067] [2021-05-22 02:22:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:03,831 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 50 [2021-05-22 02:22:04,056 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-22 02:22:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:04,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:04,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643187067] [2021-05-22 02:22:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643187067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:04,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:04,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:04,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488446170] [2021-05-22 02:22:04,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:04,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:04,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:04,218 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,494 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-22 02:22:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:04,511 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-05-22 02:22:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:04,524 INFO L225 Difference]: With dead ends: 98 [2021-05-22 02:22:04,524 INFO L226 Difference]: Without dead ends: 72 [2021-05-22 02:22:04,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-22 02:22:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-05-22 02:22:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-05-22 02:22:04,564 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-05-22 02:22:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:04,565 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-05-22 02:22:04,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-05-22 02:22:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:04,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:04,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:04,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:22:04,574 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1802957754, now seen corresponding path program 2 times [2021-05-22 02:22:04,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:04,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582868708] [2021-05-22 02:22:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:04,837 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-22 02:22:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:04,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:04,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582868708] [2021-05-22 02:22:04,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582868708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:04,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:04,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:04,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887137265] [2021-05-22 02:22:05,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:05,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:05,006 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,218 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-22 02:22:05,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:05,236 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-05-22 02:22:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:05,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:05,238 INFO L225 Difference]: With dead ends: 93 [2021-05-22 02:22:05,239 INFO L226 Difference]: Without dead ends: 65 [2021-05-22 02:22:05,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-22 02:22:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-05-22 02:22:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-05-22 02:22:05,244 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-05-22 02:22:05,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:05,245 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-05-22 02:22:05,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-05-22 02:22:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:05,246 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:05,246 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:05,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:22:05,246 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:05,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2138675270, now seen corresponding path program 3 times [2021-05-22 02:22:05,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:05,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288075183] [2021-05-22 02:22:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:05,447 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-05-22 02:22:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:05,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:05,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288075183] [2021-05-22 02:22:05,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288075183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:05,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:05,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:05,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111876984] [2021-05-22 02:22:05,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:05,540 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,758 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-22 02:22:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:05,769 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-05-22 02:22:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:05,771 INFO L225 Difference]: With dead ends: 80 [2021-05-22 02:22:05,771 INFO L226 Difference]: Without dead ends: 54 [2021-05-22 02:22:05,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-22 02:22:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-22 02:22:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-05-22 02:22:05,777 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-05-22 02:22:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:05,777 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-05-22 02:22:05,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-05-22 02:22:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:05,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:05,778 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:05,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:22:05,778 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1206578024, now seen corresponding path program 4 times [2021-05-22 02:22:05,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:05,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382131930] [2021-05-22 02:22:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:05,946 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-05-22 02:22:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:06,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:06,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382131930] [2021-05-22 02:22:06,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382131930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:06,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:06,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:06,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140891775] [2021-05-22 02:22:06,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:06,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:06,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:06,066 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:06,227 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-05-22 02:22:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:06,228 INFO L225 Difference]: With dead ends: 56 [2021-05-22 02:22:06,229 INFO L226 Difference]: Without dead ends: 33 [2021-05-22 02:22:06,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-22 02:22:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-22 02:22:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-05-22 02:22:06,233 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-05-22 02:22:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:06,233 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-05-22 02:22:06,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-05-22 02:22:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:06,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:06,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:06,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:22:06,234 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:06,235 INFO L82 PathProgramCache]: Analyzing trace with hash 531109224, now seen corresponding path program 5 times [2021-05-22 02:22:06,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:06,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467641466] [2021-05-22 02:22:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:06,480 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-05-22 02:22:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:06,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:06,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467641466] [2021-05-22 02:22:06,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467641466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:06,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:06,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:06,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281701744] [2021-05-22 02:22:06,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:06,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:06,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:06,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:06,598 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,814 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-22 02:22:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:06,820 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-05-22 02:22:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:06,834 INFO L225 Difference]: With dead ends: 48 [2021-05-22 02:22:06,834 INFO L226 Difference]: Without dead ends: 27 [2021-05-22 02:22:06,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-22 02:22:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-22 02:22:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-05-22 02:22:06,837 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-05-22 02:22:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:06,837 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-05-22 02:22:06,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-05-22 02:22:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:06,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:06,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:06,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:22:06,838 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash 202726342, now seen corresponding path program 6 times [2021-05-22 02:22:06,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:06,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786560190] [2021-05-22 02:22:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:07,041 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-05-22 02:22:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:07,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:07,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786560190] [2021-05-22 02:22:07,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786560190] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:07,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:07,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662907518] [2021-05-22 02:22:07,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:07,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:07,162 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:07,316 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-05-22 02:22:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:22:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:07,317 INFO L225 Difference]: With dead ends: 25 [2021-05-22 02:22:07,317 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 02:22:07,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 02:22:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 02:22:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 02:22:07,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-22 02:22:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:07,319 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 02:22:07,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 02:22:07,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:22:07,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:22:07,320 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 02:22:07,321 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 02:22:07,322 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:22:07,322 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:22:07,322 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:22:07,323 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:22:07,323 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:22:07,323 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:22:07,323 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:22:07,323 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:22:07,324 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-05-22 02:22:07,326 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,328 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:22:07,328 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 02:22:07,328 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:22:07,330 INFO L202 PluginConnector]: Adding new model match-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:22:07 BasicIcfg [2021-05-22 02:22:07,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:22:07,331 INFO L168 Benchmark]: Toolchain (without parser) took 4481.25 ms. Allocated memory was 400.6 MB in the beginning and 482.3 MB in the end (delta: 81.8 MB). Free memory was 379.7 MB in the beginning and 463.3 MB in the end (delta: -83.5 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:07,332 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 400.6 MB. Free memory is still 380.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:22:07,332 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.13 ms. Allocated memory is still 400.6 MB. Free memory was 379.6 MB in the beginning and 378.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:22:07,333 INFO L168 Benchmark]: Boogie Preprocessor took 26.18 ms. Allocated memory is still 400.6 MB. Free memory was 378.1 MB in the beginning and 377.2 MB in the end (delta: 856.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:07,333 INFO L168 Benchmark]: RCFGBuilder took 262.16 ms. Allocated memory is still 400.6 MB. Free memory was 377.2 MB in the beginning and 366.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-22 02:22:07,333 INFO L168 Benchmark]: TraceAbstraction took 4162.31 ms. Allocated memory was 400.6 MB in the beginning and 482.3 MB in the end (delta: 81.8 MB). Free memory was 366.2 MB in the beginning and 463.3 MB in the end (delta: -97.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:22:07,335 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 400.6 MB. Free memory is still 380.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.13 ms. Allocated memory is still 400.6 MB. Free memory was 379.6 MB in the beginning and 378.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.18 ms. Allocated memory is still 400.6 MB. Free memory was 378.1 MB in the beginning and 377.2 MB in the end (delta: 856.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 262.16 ms. Allocated memory is still 400.6 MB. Free memory was 377.2 MB in the beginning and 366.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4162.31 ms. Allocated memory was 400.6 MB in the beginning and 482.3 MB in the end (delta: 81.8 MB). Free memory was 366.2 MB in the beginning and 463.3 MB in the end (delta: -97.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4077.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 24.9ms, AutomataDifference: 1349.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2546.6ms 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: 45.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.6ms SsaConstructionTime, 128.8ms SatisfiabilityAnalysisTime, 2297.8ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3392 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: 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...