/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-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-11 00:09:15,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-11 00:09:15,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-11 00:09:15,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-11 00:09:15,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-11 00:09:15,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-11 00:09:15,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-11 00:09:15,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-11 00:09:15,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-11 00:09:15,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-11 00:09:15,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-11 00:09:15,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-11 00:09:15,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-11 00:09:15,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-11 00:09:15,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-11 00:09:15,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-11 00:09:15,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-11 00:09:15,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-11 00:09:15,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-11 00:09:15,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-11 00:09:15,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-11 00:09:15,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-11 00:09:15,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-11 00:09:15,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-11 00:09:15,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-11 00:09:15,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-11 00:09:15,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-11 00:09:15,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-11 00:09:15,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-11 00:09:15,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-11 00:09:15,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-11 00:09:15,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-11 00:09:15,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-11 00:09:15,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-11 00:09:15,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-11 00:09:15,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-11 00:09:15,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-11 00:09:15,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-11 00:09:15,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-11 00:09:15,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-11 00:09:15,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-11 00:09:15,318 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-PN-SemanticLbe.epf [2021-06-11 00:09:15,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-11 00:09:15,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-11 00:09:15,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-11 00:09:15,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-11 00:09:15,337 INFO L138 SettingsManager]: * Use SBE=true [2021-06-11 00:09:15,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-11 00:09:15,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-11 00:09:15,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-11 00:09:15,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-11 00:09:15,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 00:09:15,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-11 00:09:15,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-11 00:09:15,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-11 00:09:15,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-11 00:09:15,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-11 00:09:15,569 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-11 00:09:15,570 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-11 00:09:15,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2021-06-11 00:09:15,570 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2021-06-11 00:09:15,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-11 00:09:15,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-11 00:09:15,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-11 00:09:15,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-11 00:09:15,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-11 00:09:15,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-11 00:09:15,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-11 00:09:15,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-11 00:09:15,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-11 00:09:15,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... [2021-06-11 00:09:15,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-11 00:09:15,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-11 00:09:15,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-11 00:09:15,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-11 00:09:15,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-11 00:09:15,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-06-11 00:09:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-06-11 00:09:15,679 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-06-11 00:09:15,680 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-06-11 00:09:15,680 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-06-11 00:09:15,680 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-06-11 00:09:15,680 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-11 00:09:15,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-11 00:09:15,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-11 00:09:15,681 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-11 00:09:15,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-11 00:09:15,762 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-11 00:09:15,763 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 12:09:15 BoogieIcfgContainer [2021-06-11 00:09:15,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-11 00:09:15,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-11 00:09:15,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-11 00:09:15,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-11 00:09:15,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.06 12:09:15" (1/2) ... [2021-06-11 00:09:15,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f903f47 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.06 12:09:15, skipping insertion in model container [2021-06-11 00:09:15,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.06 12:09:15" (2/2) ... [2021-06-11 00:09:15,768 INFO L111 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2021-06-11 00:09:15,771 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-11 00:09:15,774 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-11 00:09:15,774 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-11 00:09:15,796 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-11 00:09:15,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-11 00:09:15,822 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-11 00:09:15,823 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-11 00:09:15,823 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-11 00:09:15,823 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-11 00:09:15,823 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-11 00:09:15,823 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-11 00:09:15,823 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-11 00:09:15,823 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-11 00:09:15,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 52 flow [2021-06-11 00:09:15,841 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-06-11 00:09:15,841 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-11 00:09:15,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 4. Up to 3 conditions per place. [2021-06-11 00:09:15,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 52 flow [2021-06-11 00:09:15,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 11 transitions, 40 flow [2021-06-11 00:09:15,847 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-11 00:09:15,856 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 11 transitions, 40 flow [2021-06-11 00:09:15,858 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 11 transitions, 40 flow [2021-06-11 00:09:15,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions, 40 flow [2021-06-11 00:09:15,862 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-06-11 00:09:15,862 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-11 00:09:15,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 11 events. 1/11 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 4. Up to 3 conditions per place. [2021-06-11 00:09:15,864 INFO L151 LiptonReduction]: Number of co-enabled transitions 20 [2021-06-11 00:09:15,903 INFO L163 LiptonReduction]: Checked pairs total: 7 [2021-06-11 00:09:15,904 INFO L165 LiptonReduction]: Total number of compositions: 2 [2021-06-11 00:09:15,905 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 59 [2021-06-11 00:09:15,911 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-06-11 00:09:15,911 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-11 00:09:15,912 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:09:15,912 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:09:15,912 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:09:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:09:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash 936852669, now seen corresponding path program 1 times [2021-06-11 00:09:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:09:15,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702509116] [2021-06-11 00:09:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:09:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:09:16,002 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:09:16,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:09:16,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:09:16,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-11 00:09:16,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:09:16,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:09:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:09:16,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702509116] [2021-06-11 00:09:16,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:09:16,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-11 00:09:16,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224094838] [2021-06-11 00:09:16,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-11 00:09:16,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:09:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-11 00:09:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-11 00:09:16,056 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 17 [2021-06-11 00:09:16,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:09:16,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 17 [2021-06-11 00:09:16,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:09:16,076 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-06-11 00:09:16,076 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-06-11 00:09:16,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 7 events. 0/7 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 00:09:16,077 INFO L132 encePairwiseOnDemand]: 15/17 looper letters, 1 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2021-06-11 00:09:16,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 30 flow [2021-06-11 00:09:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-11 00:09:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-11 00:09:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2021-06-11 00:09:16,088 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8823529411764706 [2021-06-11 00:09:16,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2021-06-11 00:09:16,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2021-06-11 00:09:16,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:09:16,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2021-06-11 00:09:16,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,097 INFO L185 Difference]: Start difference. First operand has 14 places, 9 transitions, 36 flow. Second operand 3 states and 45 transitions. [2021-06-11 00:09:16,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 30 flow [2021-06-11 00:09:16,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 22 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-11 00:09:16,101 INFO L241 Difference]: Finished difference. Result has 12 places, 7 transitions, 20 flow [2021-06-11 00:09:16,102 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2021-06-11 00:09:16,105 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2021-06-11 00:09:16,105 INFO L480 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 20 flow [2021-06-11 00:09:16,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,106 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:09:16,106 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:09:16,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-11 00:09:16,106 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:09:16,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:09:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash 798179439, now seen corresponding path program 1 times [2021-06-11 00:09:16,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:09:16,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938565997] [2021-06-11 00:09:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:09:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:09:16,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:09:16,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:09:16,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:09:16,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:09:16,173 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-11 00:09:16,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-11 00:09:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:09:16,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938565997] [2021-06-11 00:09:16,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:09:16,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-11 00:09:16,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736992699] [2021-06-11 00:09:16,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-11 00:09:16,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:09:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-11 00:09:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-11 00:09:16,187 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2021-06-11 00:09:16,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 20 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:09:16,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2021-06-11 00:09:16,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:09:16,215 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-11 00:09:16,215 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-11 00:09:16,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-11 00:09:16,215 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 2 selfloop transitions, 1 changer transitions 1/8 dead transitions. [2021-06-11 00:09:16,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 30 flow [2021-06-11 00:09:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-11 00:09:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-11 00:09:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2021-06-11 00:09:16,218 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7205882352941176 [2021-06-11 00:09:16,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 49 transitions. [2021-06-11 00:09:16,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 49 transitions. [2021-06-11 00:09:16,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:09:16,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 49 transitions. [2021-06-11 00:09:16,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,224 INFO L185 Difference]: Start difference. First operand has 12 places, 7 transitions, 20 flow. Second operand 4 states and 49 transitions. [2021-06-11 00:09:16,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 30 flow [2021-06-11 00:09:16,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 8 transitions, 29 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-11 00:09:16,226 INFO L241 Difference]: Finished difference. Result has 16 places, 7 transitions, 26 flow [2021-06-11 00:09:16,229 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=26, PETRI_PLACES=16, PETRI_TRANSITIONS=7} [2021-06-11 00:09:16,230 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2021-06-11 00:09:16,230 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 7 transitions, 26 flow [2021-06-11 00:09:16,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,230 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-11 00:09:16,230 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-11 00:09:16,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-11 00:09:16,231 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-11 00:09:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-11 00:09:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash 799217319, now seen corresponding path program 2 times [2021-06-11 00:09:16,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-11 00:09:16,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720525816] [2021-06-11 00:09:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-11 00:09:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-11 00:09:16,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:09:16,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-11 00:09:16,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-11 00:09:16,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-11 00:09:16,262 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-11 00:09:16,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-11 00:09:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-11 00:09:16,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720525816] [2021-06-11 00:09:16,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-11 00:09:16,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-11 00:09:16,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929530724] [2021-06-11 00:09:16,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-11 00:09:16,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-11 00:09:16,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-11 00:09:16,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-11 00:09:16,276 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 17 [2021-06-11 00:09:16,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 7 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-11 00:09:16,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 17 [2021-06-11 00:09:16,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-11 00:09:16,292 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-06-11 00:09:16,292 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-06-11 00:09:16,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 8 events. 0/8 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-11 00:09:16,292 INFO L132 encePairwiseOnDemand]: 14/17 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2021-06-11 00:09:16,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 7 transitions, 33 flow [2021-06-11 00:09:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-11 00:09:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-11 00:09:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2021-06-11 00:09:16,294 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2021-06-11 00:09:16,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2021-06-11 00:09:16,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2021-06-11 00:09:16,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-11 00:09:16,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2021-06-11 00:09:16,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,298 INFO L185 Difference]: Start difference. First operand has 16 places, 7 transitions, 26 flow. Second operand 4 states and 48 transitions. [2021-06-11 00:09:16,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 7 transitions, 33 flow [2021-06-11 00:09:16,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-11 00:09:16,299 INFO L241 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2021-06-11 00:09:16,300 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2021-06-11 00:09:16,300 INFO L343 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2021-06-11 00:09:16,300 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2021-06-11 00:09:16,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-11 00:09:16,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-11 00:09:16,304 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.06 12:09:16 BasicIcfg [2021-06-11 00:09:16,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-11 00:09:16,306 INFO L168 Benchmark]: Toolchain (without parser) took 707.64 ms. Allocated memory is still 394.3 MB. Free memory was 374.8 MB in the beginning and 346.1 MB in the end (delta: 28.8 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.0 GB. [2021-06-11 00:09:16,306 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 394.3 MB. Free memory was 375.8 MB in the beginning and 375.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 00:09:16,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.65 ms. Allocated memory is still 394.3 MB. Free memory was 374.7 MB in the beginning and 373.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-11 00:09:16,308 INFO L168 Benchmark]: Boogie Preprocessor took 8.89 ms. Allocated memory is still 394.3 MB. Free memory was 373.3 MB in the beginning and 372.4 MB in the end (delta: 822.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-11 00:09:16,311 INFO L168 Benchmark]: RCFGBuilder took 137.31 ms. Allocated memory is still 394.3 MB. Free memory was 372.4 MB in the beginning and 364.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-11 00:09:16,312 INFO L168 Benchmark]: TraceAbstraction took 540.26 ms. Allocated memory is still 394.3 MB. Free memory was 363.7 MB in the beginning and 346.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-06-11 00:09:16,315 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 394.3 MB. Free memory was 375.8 MB in the beginning and 375.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.65 ms. Allocated memory is still 394.3 MB. Free memory was 374.7 MB in the beginning and 373.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.89 ms. Allocated memory is still 394.3 MB. Free memory was 373.3 MB in the beginning and 372.4 MB in the end (delta: 822.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 137.31 ms. Allocated memory is still 394.3 MB. Free memory was 372.4 MB in the beginning and 364.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 540.26 ms. Allocated memory is still 394.3 MB. Free memory was 363.7 MB in the beginning and 346.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 45.3ms, 16 PlacesBefore, 14 PlacesAfterwards, 11 TransitionsBefore, 9 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 7 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 7, unknown conditional: 0, unknown unconditional: 7] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 481.1ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 123.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 85.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 4 SDslu, 2 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 11, 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: TRACE_CHECK: 4.1ms SsaConstructionTime, 19.5ms SatisfiabilityAnalysisTime, 155.6ms InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...