/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 15:05:44,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 15:05:44,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 15:05:45,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 15:05:45,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 15:05:45,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 15:05:45,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 15:05:45,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 15:05:45,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 15:05:45,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 15:05:45,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 15:05:45,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 15:05:45,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 15:05:45,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 15:05:45,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 15:05:45,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 15:05:45,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 15:05:45,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 15:05:45,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 15:05:45,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 15:05:45,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 15:05:45,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 15:05:45,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 15:05:45,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 15:05:45,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 15:05:45,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 15:05:45,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 15:05:45,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 15:05:45,074 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-VariableLbe.epf [2021-03-24 15:05:45,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 15:05:45,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 15:05:45,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 15:05:45,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 15:05:45,113 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 15:05:45,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 15:05:45,113 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 15:05:45,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 15:05:45,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 15:05:45,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 15:05:45,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 15:05:45,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 15:05:45,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 15:05:45,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 15:05:45,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 15:05:45,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 15:05:45,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 15:05:45,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 15:05:45,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 15:05:45,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 15:05:45,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 15:05:45,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 15:05:45,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 15:05:45,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 15:05:45,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 15:05:45,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 15:05:45,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 15:05:45,118 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 15:05:45,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 15:05:45,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 15:05:45,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 15:05:45,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 15:05:45,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 15:05:45,461 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 15:05:45,462 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 15:05:45,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl [2021-03-24 15:05:45,470 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl' [2021-03-24 15:05:45,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 15:05:45,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 15:05:45,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 15:05:45,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 15:05:45,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 15:05:45,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 15:05:45,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 15:05:45,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 15:05:45,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 15:05:45,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/1) ... [2021-03-24 15:05:45,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 15:05:45,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 15:05:45,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 15:05:45,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 15:05:45,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (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 [2021-03-24 15:05:45,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 15:05:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 15:05:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 15:05:45,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 15:05:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 15:05:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 15:05:45,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 15:05:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 15:05:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 15:05:45,621 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 15:05:45,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 15:05:45,818 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 15:05:45,819 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:05:45 BoogieIcfgContainer [2021-03-24 15:05:45,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 15:05:45,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 15:05:45,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 15:05:45,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 15:05:45,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:05:45" (1/2) ... [2021-03-24 15:05:45,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fd39a4 and model type bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 03:05:45, skipping insertion in model container [2021-03-24 15:05:45,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:05:45" (2/2) ... [2021-03-24 15:05:45,824 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-2.wvr.bpl [2021-03-24 15:05:45,828 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 15:05:45,831 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 15:05:45,832 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 15:05:45,859 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-24 15:05:45,875 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-24 15:05:45,892 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 15:05:45,893 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 15:05:45,893 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 15:05:45,893 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 15:05:45,893 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 15:05:45,893 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 15:05:45,893 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 15:05:45,893 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 15:05:45,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 78 flow [2021-03-24 15:05:45,921 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-03-24 15:05:45,921 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 15:05:45,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 0/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 15:05:45,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 78 flow [2021-03-24 15:05:45,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 27 transitions, 66 flow [2021-03-24 15:05:45,927 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 15:05:45,935 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 27 transitions, 66 flow [2021-03-24 15:05:45,937 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 27 transitions, 66 flow [2021-03-24 15:05:45,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 66 flow [2021-03-24 15:05:45,946 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-03-24 15:05:45,946 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 15:05:45,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 0/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 15:05:45,948 INFO L142 LiptonReduction]: Number of co-enabled transitions 240 [2021-03-24 15:05:45,998 INFO L154 LiptonReduction]: Checked pairs total: 716 [2021-03-24 15:05:45,998 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 15:05:45,999 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 73 [2021-03-24 15:05:46,010 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-03-24 15:05:46,010 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 15:05:46,010 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:05:46,011 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:05:46,011 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:05:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:05:46,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1020421601, now seen corresponding path program 1 times [2021-03-24 15:05:46,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:05:46,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943085854] [2021-03-24 15:05:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:05:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:05:46,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,275 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-24 15:05:46,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:05:46,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943085854] [2021-03-24 15:05:46,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:05:46,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:05:46,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906106016] [2021-03-24 15:05:46,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 15:05:46,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:05:46,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 15:05:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-24 15:05:46,328 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 34 [2021-03-24 15:05:46,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 60 flow. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 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) [2021-03-24 15:05:46,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:05:46,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 34 [2021-03-24 15:05:46,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:05:46,506 INFO L129 PetriNetUnfolder]: 1/48 cut-off events. [2021-03-24 15:05:46,507 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-24 15:05:46,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 48 events. 1/48 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 56. Up to 5 conditions per place. [2021-03-24 15:05:46,509 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 7 selfloop transitions, 7 changer transitions 2/34 dead transitions. [2021-03-24 15:05:46,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 112 flow [2021-03-24 15:05:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 15:05:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 15:05:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2021-03-24 15:05:46,533 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8272058823529411 [2021-03-24 15:05:46,534 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 225 transitions. [2021-03-24 15:05:46,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 225 transitions. [2021-03-24 15:05:46,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:05:46,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 225 transitions. [2021-03-24 15:05:46,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 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) [2021-03-24 15:05:46,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2021-03-24 15:05:46,563 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2021-03-24 15:05:46,564 INFO L185 Difference]: Start difference. First operand has 31 places, 24 transitions, 60 flow. Second operand 8 states and 225 transitions. [2021-03-24 15:05:46,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 112 flow [2021-03-24 15:05:46,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-24 15:05:46,573 INFO L241 Difference]: Finished difference. Result has 37 places, 29 transitions, 90 flow [2021-03-24 15:05:46,575 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2021-03-24 15:05:46,576 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2021-03-24 15:05:46,576 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 90 flow [2021-03-24 15:05:46,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 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) [2021-03-24 15:05:46,576 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:05:46,576 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:05:46,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 15:05:46,577 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:05:46,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:05:46,577 INFO L82 PathProgramCache]: Analyzing trace with hash 672930461, now seen corresponding path program 2 times [2021-03-24 15:05:46,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:05:46,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152619337] [2021-03-24 15:05:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:05:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:05:46,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,676 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-24 15:05:46,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:05:46,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152619337] [2021-03-24 15:05:46,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:05:46,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:05:46,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141354339] [2021-03-24 15:05:46,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 15:05:46,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:05:46,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 15:05:46,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-24 15:05:46,698 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 34 [2021-03-24 15:05:46,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 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) [2021-03-24 15:05:46,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:05:46,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 34 [2021-03-24 15:05:46,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:05:46,779 INFO L129 PetriNetUnfolder]: 1/42 cut-off events. [2021-03-24 15:05:46,780 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-24 15:05:46,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 42 events. 1/42 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 72. Up to 5 conditions per place. [2021-03-24 15:05:46,780 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 4 selfloop transitions, 6 changer transitions 4/32 dead transitions. [2021-03-24 15:05:46,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 132 flow [2021-03-24 15:05:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-24 15:05:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-24 15:05:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2021-03-24 15:05:46,783 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2021-03-24 15:05:46,783 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 222 transitions. [2021-03-24 15:05:46,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 222 transitions. [2021-03-24 15:05:46,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:05:46,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 222 transitions. [2021-03-24 15:05:46,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 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) [2021-03-24 15:05:46,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2021-03-24 15:05:46,786 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2021-03-24 15:05:46,786 INFO L185 Difference]: Start difference. First operand has 37 places, 29 transitions, 90 flow. Second operand 8 states and 222 transitions. [2021-03-24 15:05:46,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 132 flow [2021-03-24 15:05:46,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 128 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-24 15:05:46,788 INFO L241 Difference]: Finished difference. Result has 42 places, 26 transitions, 89 flow [2021-03-24 15:05:46,788 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=89, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2021-03-24 15:05:46,788 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2021-03-24 15:05:46,789 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 89 flow [2021-03-24 15:05:46,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 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) [2021-03-24 15:05:46,789 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:05:46,789 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:05:46,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 15:05:46,789 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:05:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:05:46,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2066657543, now seen corresponding path program 3 times [2021-03-24 15:05:46,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:05:46,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921100078] [2021-03-24 15:05:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:05:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:05:46,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 15:05:46,837 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-03-24 15:05:46,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:46,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 15:05:46,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:05:46,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921100078] [2021-03-24 15:05:46,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:05:46,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 15:05:46,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795175004] [2021-03-24 15:05:46,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 15:05:46,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:05:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 15:05:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-24 15:05:46,857 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 34 [2021-03-24 15:05:46,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 89 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-03-24 15:05:46,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:05:46,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 34 [2021-03-24 15:05:46,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:05:46,936 INFO L129 PetriNetUnfolder]: 15/95 cut-off events. [2021-03-24 15:05:46,936 INFO L130 PetriNetUnfolder]: For 9/10 co-relation queries the response was YES. [2021-03-24 15:05:46,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 95 events. 15/95 cut-off events. For 9/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 332 event pairs, 3 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 178. Up to 25 conditions per place. [2021-03-24 15:05:46,939 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 12 selfloop transitions, 5 changer transitions 4/38 dead transitions. [2021-03-24 15:05:46,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 155 flow [2021-03-24 15:05:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 15:05:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 15:05:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2021-03-24 15:05:46,941 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7549019607843137 [2021-03-24 15:05:46,942 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 154 transitions. [2021-03-24 15:05:46,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 154 transitions. [2021-03-24 15:05:46,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:05:46,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 154 transitions. [2021-03-24 15:05:46,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 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) [2021-03-24 15:05:46,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2021-03-24 15:05:46,946 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2021-03-24 15:05:46,946 INFO L185 Difference]: Start difference. First operand has 42 places, 26 transitions, 89 flow. Second operand 6 states and 154 transitions. [2021-03-24 15:05:46,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 155 flow [2021-03-24 15:05:46,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 132 flow, removed 2 selfloop flow, removed 10 redundant places. [2021-03-24 15:05:46,950 INFO L241 Difference]: Finished difference. Result has 38 places, 29 transitions, 97 flow [2021-03-24 15:05:46,951 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2021-03-24 15:05:46,951 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2021-03-24 15:05:46,951 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 97 flow [2021-03-24 15:05:46,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-03-24 15:05:46,951 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:05:46,951 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:05:46,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 15:05:46,952 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:05:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:05:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash -379480399, now seen corresponding path program 4 times [2021-03-24 15:05:46,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:05:46,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670542841] [2021-03-24 15:05:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:05:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:05:46,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:46,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:46,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:46,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:05:46,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670542841] [2021-03-24 15:05:46,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:05:46,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:05:46,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881528265] [2021-03-24 15:05:46,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 15:05:46,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:05:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 15:05:46,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 15:05:46,990 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 34 [2021-03-24 15:05:46,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:05:46,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:05:46,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 34 [2021-03-24 15:05:46,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:05:47,001 INFO L129 PetriNetUnfolder]: 2/55 cut-off events. [2021-03-24 15:05:47,001 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 15:05:47,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 55 events. 2/55 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 3/58 useless extension candidates. Maximal degree in co-relation 34. Up to 9 conditions per place. [2021-03-24 15:05:47,002 INFO L132 encePairwiseOnDemand]: 31/34 looper letters, 2 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2021-03-24 15:05:47,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 105 flow [2021-03-24 15:05:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 15:05:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 15:05:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2021-03-24 15:05:47,003 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9019607843137255 [2021-03-24 15:05:47,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2021-03-24 15:05:47,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2021-03-24 15:05:47,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:05:47,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2021-03-24 15:05:47,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-03-24 15:05:47,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-03-24 15:05:47,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-03-24 15:05:47,005 INFO L185 Difference]: Start difference. First operand has 38 places, 29 transitions, 97 flow. Second operand 3 states and 92 transitions. [2021-03-24 15:05:47,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 105 flow [2021-03-24 15:05:47,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 100 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 15:05:47,006 INFO L241 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2021-03-24 15:05:47,006 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2021-03-24 15:05:47,007 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2021-03-24 15:05:47,007 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2021-03-24 15:05:47,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:05:47,007 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:05:47,007 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:05:47,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 15:05:47,008 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:05:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:05:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash 684498815, now seen corresponding path program 5 times [2021-03-24 15:05:47,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:05:47,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124866059] [2021-03-24 15:05:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:05:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:05:47,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:47,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:47,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:05:47,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124866059] [2021-03-24 15:05:47,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:05:47,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:05:47,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043883951] [2021-03-24 15:05:47,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 15:05:47,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:05:47,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 15:05:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 15:05:47,025 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 34 [2021-03-24 15:05:47,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:05:47,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:05:47,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 34 [2021-03-24 15:05:47,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:05:47,048 INFO L129 PetriNetUnfolder]: 3/63 cut-off events. [2021-03-24 15:05:47,048 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-24 15:05:47,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 63 events. 3/63 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 1 based on Foata normal form. 2/65 useless extension candidates. Maximal degree in co-relation 50. Up to 10 conditions per place. [2021-03-24 15:05:47,049 INFO L132 encePairwiseOnDemand]: 31/34 looper letters, 2 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2021-03-24 15:05:47,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 108 flow [2021-03-24 15:05:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 15:05:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 15:05:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2021-03-24 15:05:47,050 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9019607843137255 [2021-03-24 15:05:47,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2021-03-24 15:05:47,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2021-03-24 15:05:47,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:05:47,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2021-03-24 15:05:47,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-03-24 15:05:47,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-03-24 15:05:47,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-03-24 15:05:47,052 INFO L185 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 3 states and 92 transitions. [2021-03-24 15:05:47,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 108 flow [2021-03-24 15:05:47,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 15:05:47,053 INFO L241 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2021-03-24 15:05:47,053 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2021-03-24 15:05:47,053 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2021-03-24 15:05:47,053 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2021-03-24 15:05:47,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:05:47,054 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:05:47,054 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:05:47,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 15:05:47,054 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:05:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:05:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash 50736451, now seen corresponding path program 6 times [2021-03-24 15:05:47,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:05:47,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701897413] [2021-03-24 15:05:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:05:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:05:47,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 15:05:47,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:47,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:05:47,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 15:05:47,100 INFO L142 QuantifierPusher]: treesize reduction 5, result has 75.0 percent of original size [2021-03-24 15:05:47,101 INFO L147 QuantifierPusher]: treesize reduction 6, result has 60.0 percent of original size 9 [2021-03-24 15:05:47,117 INFO L142 QuantifierPusher]: treesize reduction 5, result has 79.2 percent of original size [2021-03-24 15:05:47,118 INFO L147 QuantifierPusher]: treesize reduction 7, result has 63.2 percent of original size 12 [2021-03-24 15:05:47,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:05:47,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701897413] [2021-03-24 15:05:47,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:05:47,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 15:05:47,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943893773] [2021-03-24 15:05:47,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 15:05:47,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:05:47,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 15:05:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-24 15:05:47,139 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 34 [2021-03-24 15:05:47,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2021-03-24 15:05:47,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:05:47,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 34 [2021-03-24 15:05:47,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:05:47,191 INFO L129 PetriNetUnfolder]: 8/73 cut-off events. [2021-03-24 15:05:47,191 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-03-24 15:05:47,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 73 events. 8/73 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 212 event pairs, 6 based on Foata normal form. 2/74 useless extension candidates. Maximal degree in co-relation 104. Up to 24 conditions per place. [2021-03-24 15:05:47,192 INFO L132 encePairwiseOnDemand]: 29/34 looper letters, 8 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2021-03-24 15:05:47,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 32 transitions, 138 flow [2021-03-24 15:05:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 15:05:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 15:05:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2021-03-24 15:05:47,194 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7184873949579832 [2021-03-24 15:05:47,194 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 171 transitions. [2021-03-24 15:05:47,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 171 transitions. [2021-03-24 15:05:47,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:05:47,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 171 transitions. [2021-03-24 15:05:47,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 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) [2021-03-24 15:05:47,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2021-03-24 15:05:47,195 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2021-03-24 15:05:47,195 INFO L185 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 7 states and 171 transitions. [2021-03-24 15:05:47,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 32 transitions, 138 flow [2021-03-24 15:05:47,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 132 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-24 15:05:47,197 INFO L241 Difference]: Finished difference. Result has 45 places, 26 transitions, 94 flow [2021-03-24 15:05:47,197 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=26} [2021-03-24 15:05:47,197 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2021-03-24 15:05:47,197 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 26 transitions, 94 flow [2021-03-24 15:05:47,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2021-03-24 15:05:47,198 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:05:47,198 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:05:47,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 15:05:47,198 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:05:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:05:47,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1263084785, now seen corresponding path program 7 times [2021-03-24 15:05:47,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:05:47,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240895641] [2021-03-24 15:05:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:05:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:05:47,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 15:05:47,235 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 15:05:47,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 15:05:47,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-24 15:05:47,256 INFO L142 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size [2021-03-24 15:05:47,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-24 15:05:47,268 INFO L142 QuantifierPusher]: treesize reduction 10, result has 52.4 percent of original size [2021-03-24 15:05:47,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-24 15:05:47,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:05:47,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:05:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:05:47,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240895641] [2021-03-24 15:05:47,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:05:47,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-24 15:05:47,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569298420] [2021-03-24 15:05:47,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-24 15:05:47,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:05:47,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-24 15:05:47,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-24 15:05:47,280 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 34 [2021-03-24 15:05:47,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 26 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2021-03-24 15:05:47,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:05:47,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 34 [2021-03-24 15:05:47,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:05:47,330 INFO L129 PetriNetUnfolder]: 5/41 cut-off events. [2021-03-24 15:05:47,330 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-03-24 15:05:47,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 41 events. 5/41 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 110 event pairs, 2 based on Foata normal form. 4/45 useless extension candidates. Maximal degree in co-relation 95. Up to 8 conditions per place. [2021-03-24 15:05:47,331 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2021-03-24 15:05:47,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 22 transitions, 111 flow [2021-03-24 15:05:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 15:05:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 15:05:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2021-03-24 15:05:47,332 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2021-03-24 15:05:47,332 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 168 transitions. [2021-03-24 15:05:47,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 168 transitions. [2021-03-24 15:05:47,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:05:47,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 168 transitions. [2021-03-24 15:05:47,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 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) [2021-03-24 15:05:47,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2021-03-24 15:05:47,333 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2021-03-24 15:05:47,334 INFO L185 Difference]: Start difference. First operand has 45 places, 26 transitions, 94 flow. Second operand 7 states and 168 transitions. [2021-03-24 15:05:47,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 22 transitions, 111 flow [2021-03-24 15:05:47,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 95 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-03-24 15:05:47,335 INFO L241 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2021-03-24 15:05:47,335 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2021-03-24 15:05:47,335 INFO L343 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2021-03-24 15:05:47,335 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2021-03-24 15:05:47,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2021-03-24 15:05:47,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 15:05:47,339 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 03:05:47 BasicIcfg [2021-03-24 15:05:47,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 15:05:47,340 INFO L168 Benchmark]: Toolchain (without parser) took 1833.24 ms. Allocated memory was 255.9 MB in the beginning and 375.4 MB in the end (delta: 119.5 MB). Free memory was 236.3 MB in the beginning and 307.1 MB in the end (delta: -70.8 MB). Peak memory consumption was 50.4 MB. Max. memory is 16.0 GB. [2021-03-24 15:05:47,341 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.3 MB in the end (delta: 93.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:05:47,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.34 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 15:05:47,341 INFO L168 Benchmark]: Boogie Preprocessor took 15.79 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 985.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:05:47,342 INFO L168 Benchmark]: RCFGBuilder took 265.84 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 237.1 MB in the end (delta: -3.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-03-24 15:05:47,342 INFO L168 Benchmark]: TraceAbstraction took 1518.65 ms. Allocated memory was 255.9 MB in the beginning and 375.4 MB in the end (delta: 119.5 MB). Free memory was 236.7 MB in the beginning and 307.1 MB in the end (delta: -70.5 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.0 GB. [2021-03-24 15:05:47,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.3 MB in the end (delta: 93.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.34 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.79 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 985.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 265.84 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 237.1 MB in the end (delta: -3.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1518.65 ms. Allocated memory was 255.9 MB in the beginning and 375.4 MB in the end (delta: 119.5 MB). Free memory was 236.7 MB in the beginning and 307.1 MB in the end (delta: -70.5 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 60.7ms, 34 PlacesBefore, 31 PlacesAfterwards, 27 TransitionsBefore, 24 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 716 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 279, positive: 213, positive conditional: 0, positive unconditional: 213, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 84, positive: 68, positive conditional: 0, positive unconditional: 68, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 84, positive: 68, positive conditional: 0, positive unconditional: 68, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 279, positive: 145, positive conditional: 0, positive unconditional: 145, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 84, unknown conditional: 0, unknown unconditional: 84] , Statistics on independence cache: Total cache size (in pairs): 57, Positive cache size: 44, Positive conditional cache size: 0, Positive unconditional cache size: 44, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - PositiveResult [Line: 54]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1447.1ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 604.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 110.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 37 SDslu, 9 SDs, 0 SdLazy, 208 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 367.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=5, InterpolantAutomatonStates: 42, 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: 16.7ms SsaConstructionTime, 82.0ms SatisfiabilityAnalysisTime, 465.2ms InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 782 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...