/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 09:52:24,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 09:52:24,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 09:52:24,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 09:52:24,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 09:52:24,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 09:52:24,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 09:52:24,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 09:52:24,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 09:52:24,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 09:52:24,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 09:52:24,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 09:52:24,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 09:52:24,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 09:52:24,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 09:52:24,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 09:52:24,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 09:52:24,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 09:52:24,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 09:52:24,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 09:52:24,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 09:52:24,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 09:52:24,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 09:52:24,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 09:52:24,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 09:52:24,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 09:52:24,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 09:52:24,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 09:52:24,249 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-RepeatedVariableLbe.epf [2021-03-25 09:52:24,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 09:52:24,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 09:52:24,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 09:52:24,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 09:52:24,289 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 09:52:24,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 09:52:24,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 09:52:24,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 09:52:24,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 09:52:24,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 09:52:24,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 09:52:24,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 09:52:24,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 09:52:24,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 09:52:24,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 09:52:24,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 09:52:24,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 09:52:24,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 09:52:24,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 09:52:24,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 09:52:24,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 09:52:24,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 09:52:24,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 09:52:24,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 09:52:24,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 09:52:24,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 09:52:24,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 09:52:24,293 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 09:52:24,293 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 09:52:24,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 09:52:24,293 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 09:52:24,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 09:52:24,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 09:52:24,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 09:52:24,573 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 09:52:24,573 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 09:52:24,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl [2021-03-25 09:52:24,574 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl' [2021-03-25 09:52:24,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 09:52:24,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 09:52:24,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 09:52:24,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 09:52:24,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 09:52:24,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 09:52:24,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 09:52:24,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 09:52:24,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 09:52:24,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/1) ... [2021-03-25 09:52:24,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 09:52:24,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 09:52:24,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 09:52:24,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 09:52:24,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (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 [2021-03-25 09:52:24,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-25 09:52:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-25 09:52:24,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-25 09:52:24,708 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-25 09:52:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-25 09:52:24,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-25 09:52:24,708 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 09:52:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 09:52:24,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 09:52:24,709 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-25 09:52:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-25 09:52:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-25 09:52:24,710 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 09:52:24,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 09:52:24,814 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 09:52:24,815 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 09:52:24 BoogieIcfgContainer [2021-03-25 09:52:24,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 09:52:24,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 09:52:24,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 09:52:24,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 09:52:24,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 09:52:24" (1/2) ... [2021-03-25 09:52:24,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fd930e and model type simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 09:52:24, skipping insertion in model container [2021-03-25 09:52:24,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 09:52:24" (2/2) ... [2021-03-25 09:52:24,823 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-equiv.wvr.bpl [2021-03-25 09:52:24,827 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 09:52:24,829 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 09:52:24,829 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 09:52:24,900 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-25 09:52:24,915 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-25 09:52:24,942 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 09:52:24,943 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 09:52:24,943 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 09:52:24,943 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 09:52:24,943 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 09:52:24,943 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 09:52:24,943 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 09:52:24,943 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 09:52:24,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 33 places, 23 transitions, 70 flow [2021-03-25 09:52:24,978 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-25 09:52:24,978 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 09:52:24,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 20 events. 0/20 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 09:52:24,980 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 23 transitions, 70 flow [2021-03-25 09:52:24,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 18 transitions, 54 flow [2021-03-25 09:52:24,985 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 09:52:24,993 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 18 transitions, 54 flow [2021-03-25 09:52:25,001 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 18 transitions, 54 flow [2021-03-25 09:52:25,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 18 transitions, 54 flow [2021-03-25 09:52:25,018 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-25 09:52:25,018 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 09:52:25,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 18 events. 0/18 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 09:52:25,020 INFO L142 LiptonReduction]: Number of co-enabled transitions 84 [2021-03-25 09:52:25,193 INFO L154 LiptonReduction]: Checked pairs total: 56 [2021-03-25 09:52:25,194 INFO L156 LiptonReduction]: Total number of compositions: 7 [2021-03-25 09:52:25,195 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 211 [2021-03-25 09:52:25,211 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 09:52:25,212 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 09:52:25,212 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 09:52:25,212 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 09:52:25,213 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 09:52:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 09:52:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1792197476, now seen corresponding path program 1 times [2021-03-25 09:52:25,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 09:52:25,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494211090] [2021-03-25 09:52:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 09:52:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 09:52:25,379 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 09:52:25,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-25 09:52:25,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-25 09:52:25,419 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-25 09:52:25,422 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 09:52:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 09:52:25,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494211090] [2021-03-25 09:52:25,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 09:52:25,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 09:52:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103251425] [2021-03-25 09:52:25,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 09:52:25,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 09:52:25,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 09:52:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 09:52:25,446 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 30 [2021-03-25 09:52:25,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 40 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-03-25 09:52:25,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 09:52:25,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 30 [2021-03-25 09:52:25,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 09:52:25,497 INFO L129 PetriNetUnfolder]: 4/22 cut-off events. [2021-03-25 09:52:25,497 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-25 09:52:25,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 22 events. 4/22 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 33 event pairs, 0 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 30. Up to 9 conditions per place. [2021-03-25 09:52:25,500 INFO L132 encePairwiseOnDemand]: 25/30 looper letters, 3 selfloop transitions, 5 changer transitions 3/17 dead transitions. [2021-03-25 09:52:25,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 74 flow [2021-03-25 09:52:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 09:52:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 09:52:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2021-03-25 09:52:25,510 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2021-03-25 09:52:25,510 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 82 transitions. [2021-03-25 09:52:25,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 82 transitions. [2021-03-25 09:52:25,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 09:52:25,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 82 transitions. [2021-03-25 09:52:25,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2021-03-25 09:52:25,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-03-25 09:52:25,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-03-25 09:52:25,529 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 40 flow. Second operand 5 states and 82 transitions. [2021-03-25 09:52:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 74 flow [2021-03-25 09:52:25,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 17 transitions, 62 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-25 09:52:25,537 INFO L241 Difference]: Finished difference. Result has 21 places, 14 transitions, 61 flow [2021-03-25 09:52:25,539 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2021-03-25 09:52:25,539 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2021-03-25 09:52:25,540 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 09:52:25,540 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 14 transitions, 61 flow [2021-03-25 09:52:25,540 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 14 transitions, 61 flow [2021-03-25 09:52:25,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 14 transitions, 61 flow [2021-03-25 09:52:25,552 INFO L129 PetriNetUnfolder]: 3/19 cut-off events. [2021-03-25 09:52:25,552 INFO L130 PetriNetUnfolder]: For 4/5 co-relation queries the response was YES. [2021-03-25 09:52:25,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 19 events. 3/19 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 1 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 27. Up to 9 conditions per place. [2021-03-25 09:52:25,554 INFO L142 LiptonReduction]: Number of co-enabled transitions 10 [2021-03-25 09:52:25,559 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 09:52:25,559 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 09:52:25,559 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 19 [2021-03-25 09:52:25,561 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 61 flow [2021-03-25 09:52:25,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-03-25 09:52:25,562 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 09:52:25,562 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 09:52:25,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 09:52:25,562 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 09:52:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 09:52:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1534572596, now seen corresponding path program 2 times [2021-03-25 09:52:25,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 09:52:25,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937516651] [2021-03-25 09:52:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 09:52:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 09:52:25,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 09:52:25,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-25 09:52:25,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-25 09:52:25,659 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-25 09:52:25,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 09:52:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 09:52:25,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937516651] [2021-03-25 09:52:25,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 09:52:25,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 09:52:25,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633035540] [2021-03-25 09:52:25,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 09:52:25,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 09:52:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 09:52:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 09:52:25,672 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 30 [2021-03-25 09:52:25,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-03-25 09:52:25,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 09:52:25,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 30 [2021-03-25 09:52:25,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 09:52:25,707 INFO L129 PetriNetUnfolder]: 2/23 cut-off events. [2021-03-25 09:52:25,707 INFO L130 PetriNetUnfolder]: For 15/21 co-relation queries the response was YES. [2021-03-25 09:52:25,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 23 events. 2/23 cut-off events. For 15/21 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 33 event pairs, 1 based on Foata normal form. 3/25 useless extension candidates. Maximal degree in co-relation 44. Up to 11 conditions per place. [2021-03-25 09:52:25,708 INFO L132 encePairwiseOnDemand]: 25/30 looper letters, 3 selfloop transitions, 2 changer transitions 5/16 dead transitions. [2021-03-25 09:52:25,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 93 flow [2021-03-25 09:52:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 09:52:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 09:52:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2021-03-25 09:52:25,712 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.54 [2021-03-25 09:52:25,712 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2021-03-25 09:52:25,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2021-03-25 09:52:25,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 09:52:25,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2021-03-25 09:52:25,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-03-25 09:52:25,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-03-25 09:52:25,719 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-03-25 09:52:25,719 INFO L185 Difference]: Start difference. First operand has 20 places, 14 transitions, 61 flow. Second operand 5 states and 81 transitions. [2021-03-25 09:52:25,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 93 flow [2021-03-25 09:52:25,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 85 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-03-25 09:52:25,721 INFO L241 Difference]: Finished difference. Result has 24 places, 11 transitions, 50 flow [2021-03-25 09:52:25,721 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=11} [2021-03-25 09:52:25,721 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2021-03-25 09:52:25,722 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 09:52:25,723 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 11 transitions, 50 flow [2021-03-25 09:52:25,723 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 11 transitions, 50 flow [2021-03-25 09:52:25,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 11 transitions, 50 flow [2021-03-25 09:52:25,729 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-03-25 09:52:25,730 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-25 09:52:25,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 13 events. 1/13 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 5 event pairs, 1 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 21. Up to 6 conditions per place. [2021-03-25 09:52:25,730 INFO L142 LiptonReduction]: Number of co-enabled transitions 2 [2021-03-25 09:52:25,731 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 09:52:25,731 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 09:52:25,731 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 9 [2021-03-25 09:52:25,733 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 11 transitions, 50 flow [2021-03-25 09:52:25,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-03-25 09:52:25,733 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 09:52:25,733 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 09:52:25,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 09:52:25,734 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 09:52:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 09:52:25,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1943400780, now seen corresponding path program 3 times [2021-03-25 09:52:25,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 09:52:25,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810238981] [2021-03-25 09:52:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 09:52:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 09:52:25,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,782 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 09:52:25,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-25 09:52:25,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 09:52:25,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-25 09:52:25,809 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-25 09:52:25,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 09:52:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 09:52:25,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810238981] [2021-03-25 09:52:25,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 09:52:25,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 09:52:25,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388682270] [2021-03-25 09:52:25,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 09:52:25,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 09:52:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 09:52:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 09:52:25,816 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 30 [2021-03-25 09:52:25,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 11 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-03-25 09:52:25,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 09:52:25,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 30 [2021-03-25 09:52:25,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 09:52:25,838 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-03-25 09:52:25,838 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-03-25 09:52:25,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 13 events. 1/13 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 24. Up to 6 conditions per place. [2021-03-25 09:52:25,839 INFO L132 encePairwiseOnDemand]: 25/30 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-03-25 09:52:25,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 12 transitions, 74 flow [2021-03-25 09:52:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 09:52:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 09:52:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-03-25 09:52:25,841 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2021-03-25 09:52:25,841 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-03-25 09:52:25,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-03-25 09:52:25,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 09:52:25,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-03-25 09:52:25,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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) [2021-03-25 09:52:25,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-03-25 09:52:25,843 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-03-25 09:52:25,844 INFO L185 Difference]: Start difference. First operand has 21 places, 11 transitions, 50 flow. Second operand 5 states and 77 transitions. [2021-03-25 09:52:25,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 12 transitions, 74 flow [2021-03-25 09:52:25,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 12 transitions, 48 flow, removed 8 selfloop flow, removed 7 redundant places. [2021-03-25 09:52:25,846 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-03-25 09:52:25,846 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2021-03-25 09:52:25,846 INFO L343 CegarLoopForPetriNet]: 21 programPoint places, -4 predicate places. [2021-03-25 09:52:25,846 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 09:52:25,847 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 0 transitions, 0 flow [2021-03-25 09:52:25,847 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 0 transitions, 0 flow [2021-03-25 09:52:25,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 09:52:25,847 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 09:52:25,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 09:52:25,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 09:52:25,848 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 09:52:25,848 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 09:52:25,848 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 09:52:25,848 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 09:52:25,852 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 09:52:25,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-03-25 09:52:25,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 09:52:25,856 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 09:52:25 BasicIcfg [2021-03-25 09:52:25,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 09:52:25,857 INFO L168 Benchmark]: Toolchain (without parser) took 1249.79 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 236.6 MB in the beginning and 321.0 MB in the end (delta: -84.4 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. [2021-03-25 09:52:25,858 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 09:52:25,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.20 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 09:52:25,859 INFO L168 Benchmark]: Boogie Preprocessor took 10.88 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.1 MB in the end (delta: 790.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 09:52:25,859 INFO L168 Benchmark]: RCFGBuilder took 171.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 241.2 MB in the end (delta: -7.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-03-25 09:52:25,861 INFO L168 Benchmark]: TraceAbstraction took 1039.25 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 240.5 MB in the beginning and 321.0 MB in the end (delta: -80.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.0 GB. [2021-03-25 09:52:25,865 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 0.15 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.20 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.88 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.1 MB in the end (delta: 790.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 171.00 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 241.2 MB in the end (delta: -7.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1039.25 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 240.5 MB in the beginning and 321.0 MB in the end (delta: -80.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 192.8ms, 28 PlacesBefore, 21 PlacesAfterwards, 18 TransitionsBefore, 11 TransitionsAfterwards, 84 CoEnabledTransitionPairs, 4 FixpointIterations, 1 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 7 TotalNumberOfCompositions, 56 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 47, positive: 45, positive conditional: 0, positive unconditional: 45, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 38, positive: 37, positive conditional: 0, positive unconditional: 37, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 38, positive: 37, positive conditional: 0, positive unconditional: 37, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 47, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 38, unknown conditional: 0, unknown unconditional: 38] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 18.3ms, 21 PlacesBefore, 20 PlacesAfterwards, 14 TransitionsBefore, 14 TransitionsAfterwards, 10 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.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] , Cache 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] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.0ms, 24 PlacesBefore, 21 PlacesAfterwards, 11 TransitionsBefore, 11 TransitionsAfterwards, 2 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.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] , Cache 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] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.9ms, 17 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.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] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.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] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.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] , Cache 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] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 45]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 913.8ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 182.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 263.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 71 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=1, InterpolantAutomatonStates: 15, 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: 14.9ms SsaConstructionTime, 38.0ms SatisfiabilityAnalysisTime, 262.4ms InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 186 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...