/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:52:40,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:52:40,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:52:40,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 17:52:40,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 17:52:40,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 17:52:40,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 17:52:40,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 17:52:40,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 17:52:40,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 17:52:40,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 17:52:40,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 17:52:40,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 17:52:40,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 17:52:40,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 17:52:40,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 17:52:40,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 17:52:40,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 17:52:40,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 17:52:40,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 17:52:40,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 17:52:40,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 17:52:40,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 17:52:40,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 17:52:40,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 17:52:40,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 17:52:40,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 17:52:40,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 17:52:40,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 17:52:40,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 17:52:40,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 17:52:40,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 17:52:40,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 17:52:40,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 17:52:40,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 17:52:40,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 17:52:40,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 17:52:40,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 17:52:40,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 17:52:40,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 17:52:40,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 17:52:40,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:52:40,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:52:40,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:52:40,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:52:40,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:52:40,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:52:40,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:52:40,146 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:52:40,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:52:40,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:52:40,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:52:40,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:52:40,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:52:40,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:52:40,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:52:40,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:52:40,148 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:52:40,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:52:40,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:52:40,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:52:40,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:52:40,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:52:40,149 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:52:40,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:52:40,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:52:40,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:52:40,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:52:40,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:52:40,410 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:52:40,410 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:52:40,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl [2021-07-09 17:52:40,411 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl' [2021-07-09 17:52:40,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:52:40,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:52:40,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:52:40,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:52:40,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:52:40,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:52:40,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:52:40,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:52:40,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:52:40,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... [2021-07-09 17:52:40,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:52:40,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:52:40,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:52:40,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:52:40,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:52:40,599 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:52:40,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:52:40,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:52:40,599 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:52:40,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:52:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:52:40,600 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:52:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:52:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:52:40,600 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:52:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:52:40,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:52:40,601 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:52:40,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:52:40,707 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:52:40,708 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:52:40 BoogieIcfgContainer [2021-07-09 17:52:40,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:52:40,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:52:40,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:52:40,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:52:40,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:40" (1/2) ... [2021-07-09 17:52:40,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb340c3 and model type simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:52:40, skipping insertion in model container [2021-07-09 17:52:40,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:52:40" (2/2) ... [2021-07-09 17:52:40,713 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-equiv.wvr.bpl [2021-07-09 17:52:40,716 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:52:40,716 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:52:40,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:52:40,717 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:52:40,767 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:52:40,782 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:52:40,813 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:52:40,813 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:52:40,813 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:52:40,813 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:52:40,813 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:52:40,813 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:52:40,814 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:52:40,814 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:52:40,820 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 23 transitions, 70 flow [2021-07-09 17:52:40,854 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:52:40,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:40,862 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:40,863 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1536863355, now seen corresponding path program 1 times [2021-07-09 17:52:40,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:40,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056953339] [2021-07-09 17:52:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:41,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056953339] [2021-07-09 17:52:41,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056953339] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:41,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:41,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:41,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581386701] [2021-07-09 17:52:41,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:41,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:41,164 INFO L87 Difference]: Start difference. First operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 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 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:41,329 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-07-09 17:52:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:52:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-07-09 17:52:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:41,337 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:52:41,337 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:52:41,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:52:41,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:52:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-07-09 17:52:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.021505376344086) internal successors, (188), 93 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 188 transitions. [2021-07-09 17:52:41,368 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 188 transitions. Word has length 18 [2021-07-09 17:52:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:41,369 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 188 transitions. [2021-07-09 17:52:41,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 188 transitions. [2021-07-09 17:52:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:52:41,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:41,370 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:41,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:52:41,371 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:41,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1013519567, now seen corresponding path program 2 times [2021-07-09 17:52:41,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:41,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990244238] [2021-07-09 17:52:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:41,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:41,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990244238] [2021-07-09 17:52:41,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990244238] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:41,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:41,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:52:41,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552334429] [2021-07-09 17:52:41,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:52:41,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:41,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:52:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:41,455 INFO L87 Difference]: Start difference. First operand 94 states and 188 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:41,551 INFO L93 Difference]: Finished difference Result 160 states and 315 transitions. [2021-07-09 17:52:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:52:41,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2021-07-09 17:52:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:41,554 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:52:41,555 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:52:41,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:52:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:52:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2021-07-09 17:52:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0) internal successors, (196), 98 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 196 transitions. [2021-07-09 17:52:41,574 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 196 transitions. Word has length 18 [2021-07-09 17:52:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:41,574 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 196 transitions. [2021-07-09 17:52:41,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 196 transitions. [2021-07-09 17:52:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:52:41,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:41,578 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:41,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:52:41,579 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:41,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1151115245, now seen corresponding path program 3 times [2021-07-09 17:52:41,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:41,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858566906] [2021-07-09 17:52:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:41,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:41,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858566906] [2021-07-09 17:52:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858566906] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838721316] [2021-07-09 17:52:41,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:41,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:41,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:41,677 INFO L87 Difference]: Start difference. First operand 99 states and 196 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:41,774 INFO L93 Difference]: Finished difference Result 150 states and 299 transitions. [2021-07-09 17:52:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:52:41,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-07-09 17:52:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:41,776 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:52:41,778 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:52:41,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:52:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:52:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-07-09 17:52:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-07-09 17:52:41,792 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 18 [2021-07-09 17:52:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:41,792 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-07-09 17:52:41,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-07-09 17:52:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:52:41,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:41,793 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:41,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:52:41,793 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1005944221, now seen corresponding path program 4 times [2021-07-09 17:52:41,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:41,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490141670] [2021-07-09 17:52:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:41,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:41,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490141670] [2021-07-09 17:52:41,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490141670] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:41,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:41,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:41,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661008428] [2021-07-09 17:52:41,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:41,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:41,908 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:41,968 INFO L93 Difference]: Finished difference Result 90 states and 169 transitions. [2021-07-09 17:52:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:52:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-07-09 17:52:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:41,969 INFO L225 Difference]: With dead ends: 90 [2021-07-09 17:52:41,969 INFO L226 Difference]: Without dead ends: 49 [2021-07-09 17:52:41,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:52:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-09 17:52:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-07-09 17:52:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.875) internal successors, (90), 48 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 90 transitions. [2021-07-09 17:52:41,971 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 90 transitions. Word has length 18 [2021-07-09 17:52:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:41,971 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 90 transitions. [2021-07-09 17:52:41,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 90 transitions. [2021-07-09 17:52:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:52:41,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:41,973 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:41,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:52:41,973 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash -779439389, now seen corresponding path program 5 times [2021-07-09 17:52:41,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:41,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986862578] [2021-07-09 17:52:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:42,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986862578] [2021-07-09 17:52:42,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986862578] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:42,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:42,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:42,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226586732] [2021-07-09 17:52:42,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:42,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:42,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:42,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:42,068 INFO L87 Difference]: Start difference. First operand 49 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:42,130 INFO L93 Difference]: Finished difference Result 74 states and 135 transitions. [2021-07-09 17:52:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:42,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-07-09 17:52:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:42,131 INFO L225 Difference]: With dead ends: 74 [2021-07-09 17:52:42,131 INFO L226 Difference]: Without dead ends: 37 [2021-07-09 17:52:42,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:52:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-07-09 17:52:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-07-09 17:52:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2021-07-09 17:52:42,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 18 [2021-07-09 17:52:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:42,135 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2021-07-09 17:52:42,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2021-07-09 17:52:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:52:42,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:42,136 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:42,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:52:42,136 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash -593743005, now seen corresponding path program 6 times [2021-07-09 17:52:42,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:42,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154650124] [2021-07-09 17:52:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154650124] [2021-07-09 17:52:42,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154650124] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:42,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:42,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694389563] [2021-07-09 17:52:42,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:42,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:42,210 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:42,259 INFO L93 Difference]: Finished difference Result 35 states and 58 transitions. [2021-07-09 17:52:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:52:42,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2021-07-09 17:52:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:42,260 INFO L225 Difference]: With dead ends: 35 [2021-07-09 17:52:42,260 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 17:52:42,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:52:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 17:52:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 17:52:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 17:52:42,261 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-07-09 17:52:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:42,264 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 17:52:42,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 17:52:42,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:52:42,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:52:42,267 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:52:42,269 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:52:42 BasicIcfg [2021-07-09 17:52:42,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:52:42,270 INFO L168 Benchmark]: Toolchain (without parser) took 1776.75 ms. Allocated memory is still 190.8 MB. Free memory was 169.9 MB in the beginning and 104.0 MB in the end (delta: 65.9 MB). Peak memory consumption was 67.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:42,271 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 171.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:52:42,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.08 ms. Allocated memory is still 190.8 MB. Free memory was 169.9 MB in the beginning and 168.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:42,274 INFO L168 Benchmark]: Boogie Preprocessor took 10.30 ms. Allocated memory is still 190.8 MB. Free memory was 168.4 MB in the beginning and 167.6 MB in the end (delta: 851.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:42,274 INFO L168 Benchmark]: RCFGBuilder took 179.21 ms. Allocated memory is still 190.8 MB. Free memory was 167.6 MB in the beginning and 158.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:42,275 INFO L168 Benchmark]: TraceAbstraction took 1560.20 ms. Allocated memory is still 190.8 MB. Free memory was 157.5 MB in the beginning and 104.0 MB in the end (delta: 53.5 MB). Peak memory consumption was 54.4 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:42,277 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 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 171.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.08 ms. Allocated memory is still 190.8 MB. Free memory was 169.9 MB in the beginning and 168.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.30 ms. Allocated memory is still 190.8 MB. Free memory was 168.4 MB in the beginning and 167.6 MB in the end (delta: 851.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 179.21 ms. Allocated memory is still 190.8 MB. Free memory was 167.6 MB in the beginning and 158.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1560.20 ms. Allocated memory is still 190.8 MB. Free memory was 157.5 MB in the beginning and 104.0 MB in the end (delta: 53.5 MB). Peak memory consumption was 54.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1467.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 14.8ms, AutomataDifference: 572.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 165 SDtfs, 164 SDslu, 510 SDs, 0 SdLazy, 446 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 215.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 420.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=2, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.8ms SsaConstructionTime, 55.1ms SatisfiabilityAnalysisTime, 572.2ms InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 638 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...