/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 15:48:56,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 15:48:56,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 15:48:56,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 15:48:56,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 15:48:56,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 15:48:56,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 15:48:56,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 15:48:56,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 15:48:56,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 15:48:56,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 15:48:56,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 15:48:56,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 15:48:56,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 15:48:56,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 15:48:56,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 15:48:56,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 15:48:56,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 15:48:56,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 15:48:56,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 15:48:56,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 15:48:56,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 15:48:56,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 15:48:56,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 15:48:56,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 15:48:56,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 15:48:56,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 15:48:56,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 15:48:56,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 15:48:56,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 15:48:56,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 15:48:56,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 15:48:56,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 15:48:56,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 15:48:56,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 15:48:56,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 15:48:56,390 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-NoLbe.epf [2021-06-10 15:48:56,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 15:48:56,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 15:48:56,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 15:48:56,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 15:48:56,410 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 15:48:56,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 15:48:56,411 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 15:48:56,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 15:48:56,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 15:48:56,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 15:48:56,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 15:48:56,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 15:48:56,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 15:48:56,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 15:48:56,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 15:48:56,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 15:48:56,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 15:48:56,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 15:48:56,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 15:48:56,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 15:48:56,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 15:48:56,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:48:56,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 15:48:56,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 15:48:56,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 15:48:56,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 15:48:56,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 15:48:56,414 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 15:48:56,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 15:48:56,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 15:48:56,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 15:48:56,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 15:48:56,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 15:48:56,709 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 15:48:56,711 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 15:48:56,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl [2021-06-10 15:48:56,713 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/collitem-subst.wvr.bpl' [2021-06-10 15:48:56,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 15:48:56,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 15:48:56,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 15:48:56,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 15:48:56,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 15:48:56,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 15:48:56,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 15:48:56,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 15:48:56,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 15:48:56,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... [2021-06-10 15:48:56,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 15:48:56,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 15:48:56,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 15:48:56,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 15:48:56,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 15:48:56,839 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-10 15:48:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-10 15:48:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-10 15:48:56,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-10 15:48:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-10 15:48:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-10 15:48:56,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 15:48:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 15:48:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 15:48:56,841 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-10 15:48:56,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-10 15:48:56,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-10 15:48:56,842 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 15:48:57,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 15:48:57,152 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 15:48:57,153 INFO L202 PluginConnector]: Adding new model collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:48:57 BoogieIcfgContainer [2021-06-10 15:48:57,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 15:48:57,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 15:48:57,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 15:48:57,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 15:48:57,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 03:48:56" (1/2) ... [2021-06-10 15:48:57,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b64b7ac and model type collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 03:48:57, skipping insertion in model container [2021-06-10 15:48:57,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 03:48:57" (2/2) ... [2021-06-10 15:48:57,160 INFO L111 eAbstractionObserver]: Analyzing ICFG collitem-subst.wvr.bpl [2021-06-10 15:48:57,164 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 15:48:57,170 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 15:48:57,179 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 15:48:57,248 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-10 15:48:57,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 15:48:57,282 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 15:48:57,283 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 15:48:57,283 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 15:48:57,283 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 15:48:57,283 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 15:48:57,283 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 15:48:57,283 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 15:48:57,283 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 15:48:57,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:48:57,310 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 15:48:57,310 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:48:57,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 15:48:57,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 19 transitions, 62 flow [2021-06-10 15:48:57,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2021-06-10 15:48:57,321 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-06-10 15:48:57,321 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-06-10 15:48:57,322 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:48:57,322 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:48:57,323 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:48:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:48:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1529605242, now seen corresponding path program 1 times [2021-06-10 15:48:57,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:48:57,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115917196] [2021-06-10 15:48:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:48:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:48:57,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:48:57,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:48:58,025 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 212 [2021-06-10 15:48:58,028 INFO L142 QuantifierPusher]: treesize reduction 7093, result has 16.2 percent of original size [2021-06-10 15:48:58,051 INFO L147 QuantifierPusher]: treesize reduction 296, result has 78.4 percent of original size 1072 [2021-06-10 15:48:58,614 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 49 [2021-06-10 15:48:58,641 INFO L142 QuantifierPusher]: treesize reduction 694, result has 47.5 percent of original size [2021-06-10 15:48:58,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 629 [2021-06-10 15:48:59,072 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2021-06-10 15:48:59,088 INFO L142 QuantifierPusher]: treesize reduction 238, result has 40.4 percent of original size [2021-06-10 15:48:59,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-06-10 15:48:59,245 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2021-06-10 15:48:59,247 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:48:59,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:48:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:48:59,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115917196] [2021-06-10 15:48:59,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:48:59,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:48:59,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761340759] [2021-06-10 15:48:59,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:48:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:48:59,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:48:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:48:59,277 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:48:59,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:48:59,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:48:59,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:48:59,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:48:59,502 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-10 15:48:59,715 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-10 15:48:59,729 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2021-06-10 15:48:59,729 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-06-10 15:48:59,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 39 events. 3/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 115 event pairs, 1 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 48. Up to 7 conditions per place. [2021-06-10 15:48:59,733 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2021-06-10 15:48:59,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 70 flow [2021-06-10 15:48:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:48:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:48:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:48:59,744 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:48:59,745 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:48:59,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:48:59,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:48:59,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:48:59,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:48:59,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:48:59,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:48:59,757 INFO L185 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:48:59,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 70 flow [2021-06-10 15:48:59,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 58 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-06-10 15:48:59,763 INFO L241 Difference]: Finished difference. Result has 25 places, 15 transitions, 49 flow [2021-06-10 15:48:59,765 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=15} [2021-06-10 15:48:59,765 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-06-10 15:48:59,765 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 15 transitions, 49 flow [2021-06-10 15:48:59,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:48:59,766 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:48:59,766 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:48:59,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 15:48:59,766 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:48:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:48:59,768 INFO L82 PathProgramCache]: Analyzing trace with hash 87231794, now seen corresponding path program 2 times [2021-06-10 15:48:59,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:48:59,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913209182] [2021-06-10 15:48:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:48:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:00,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:00,017 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:00,671 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 208 [2021-06-10 15:49:00,673 INFO L142 QuantifierPusher]: treesize reduction 99156, result has 10.7 percent of original size [2021-06-10 15:49:00,733 INFO L147 QuantifierPusher]: treesize reduction 8276, result has 30.4 percent of original size 3610 [2021-06-10 15:49:01,317 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 45 [2021-06-10 15:49:01,590 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 124 [2021-06-10 15:49:01,591 INFO L142 QuantifierPusher]: treesize reduction 44606, result has 5.2 percent of original size [2021-06-10 15:49:01,608 INFO L147 QuantifierPusher]: treesize reduction 1294, result has 47.1 percent of original size 1150 [2021-06-10 15:49:02,250 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 65 [2021-06-10 15:49:02,254 INFO L142 QuantifierPusher]: treesize reduction 638, result has 7.4 percent of original size [2021-06-10 15:49:02,255 INFO L147 QuantifierPusher]: treesize reduction 10, result has 80.4 percent of original size 41 [2021-06-10 15:49:02,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:02,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913209182] [2021-06-10 15:49:02,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:02,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:02,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923743709] [2021-06-10 15:49:02,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:02,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:02,303 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:02,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 15 transitions, 49 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:02,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:02,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:02,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:02,449 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-10 15:49:02,631 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-10 15:49:02,647 INFO L129 PetriNetUnfolder]: 1/46 cut-off events. [2021-06-10 15:49:02,647 INFO L130 PetriNetUnfolder]: For 25/28 co-relation queries the response was YES. [2021-06-10 15:49:02,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 46 events. 1/46 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 177 event pairs, 1 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 71. Up to 8 conditions per place. [2021-06-10 15:49:02,648 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2021-06-10 15:49:02,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 85 flow [2021-06-10 15:49:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:02,649 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:02,650 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:02,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:02,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:02,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:02,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:02,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:02,652 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:02,652 INFO L185 Difference]: Start difference. First operand has 25 places, 15 transitions, 49 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:02,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 85 flow [2021-06-10 15:49:02,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 78 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-10 15:49:02,653 INFO L241 Difference]: Finished difference. Result has 29 places, 16 transitions, 66 flow [2021-06-10 15:49:02,654 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2021-06-10 15:49:02,654 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2021-06-10 15:49:02,654 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 66 flow [2021-06-10 15:49:02,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:02,654 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:02,654 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:02,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 15:49:02,655 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash 37535172, now seen corresponding path program 3 times [2021-06-10 15:49:02,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:02,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984333897] [2021-06-10 15:49:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:02,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:02,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:02,800 INFO L142 QuantifierPusher]: treesize reduction 3302, result has 4.3 percent of original size [2021-06-10 15:49:02,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-06-10 15:49:02,905 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-10 15:49:02,919 INFO L142 QuantifierPusher]: treesize reduction 377, result has 54.2 percent of original size [2021-06-10 15:49:02,923 INFO L147 QuantifierPusher]: treesize reduction 32, result has 92.8 percent of original size 415 [2021-06-10 15:49:03,223 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2021-06-10 15:49:03,226 INFO L142 QuantifierPusher]: treesize reduction 90, result has 53.4 percent of original size [2021-06-10 15:49:03,237 INFO L147 QuantifierPusher]: treesize reduction 7, result has 93.2 percent of original size 96 [2021-06-10 15:49:03,361 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-06-10 15:49:03,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:03,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:03,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984333897] [2021-06-10 15:49:03,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:03,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499083578] [2021-06-10 15:49:03,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:03,364 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:03,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:03,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:03,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:03,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:03,522 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-10 15:49:03,690 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-10 15:49:03,708 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-06-10 15:49:03,708 INFO L130 PetriNetUnfolder]: For 43/46 co-relation queries the response was YES. [2021-06-10 15:49:03,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 41 events. 1/41 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 147 event pairs, 0 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2021-06-10 15:49:03,709 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 3 changer transitions 3/21 dead transitions. [2021-06-10 15:49:03,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 120 flow [2021-06-10 15:49:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:03,711 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:03,711 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:03,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:03,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:03,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:03,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:03,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:03,713 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:03,713 INFO L185 Difference]: Start difference. First operand has 29 places, 16 transitions, 66 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:03,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 120 flow [2021-06-10 15:49:03,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 110 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-10 15:49:03,715 INFO L241 Difference]: Finished difference. Result has 33 places, 16 transitions, 76 flow [2021-06-10 15:49:03,715 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=16} [2021-06-10 15:49:03,715 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2021-06-10 15:49:03,715 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 76 flow [2021-06-10 15:49:03,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:03,716 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:03,716 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:03,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 15:49:03,716 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1914605312, now seen corresponding path program 4 times [2021-06-10 15:49:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:03,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434127783] [2021-06-10 15:49:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:03,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:03,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:03,813 INFO L142 QuantifierPusher]: treesize reduction 5863, result has 32.0 percent of original size [2021-06-10 15:49:03,826 INFO L147 QuantifierPusher]: treesize reduction 386, result has 86.0 percent of original size 2371 [2021-06-10 15:49:04,343 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 47 [2021-06-10 15:49:04,363 INFO L142 QuantifierPusher]: treesize reduction 1011, result has 34.1 percent of original size [2021-06-10 15:49:04,366 INFO L147 QuantifierPusher]: treesize reduction 51, result has 90.3 percent of original size 473 [2021-06-10 15:49:04,735 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2021-06-10 15:49:04,736 INFO L142 QuantifierPusher]: treesize reduction 58, result has 48.7 percent of original size [2021-06-10 15:49:04,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-06-10 15:49:04,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:04,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434127783] [2021-06-10 15:49:04,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:04,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:04,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418571579] [2021-06-10 15:49:04,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:04,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:04,774 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:04,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 16 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:04,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:04,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:04,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:05,027 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2021-06-10 15:49:05,311 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2021-06-10 15:49:05,327 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-06-10 15:49:05,328 INFO L130 PetriNetUnfolder]: For 70/76 co-relation queries the response was YES. [2021-06-10 15:49:05,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 38 events. 0/38 cut-off events. For 70/76 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 116 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-06-10 15:49:05,328 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 5 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-10 15:49:05,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 20 transitions, 130 flow [2021-06-10 15:49:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2021-06-10 15:49:05,329 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8315789473684211 [2021-06-10 15:49:05,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 79 transitions. [2021-06-10 15:49:05,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 79 transitions. [2021-06-10 15:49:05,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:05,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 79 transitions. [2021-06-10 15:49:05,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:05,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:05,331 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:05,331 INFO L185 Difference]: Start difference. First operand has 33 places, 16 transitions, 76 flow. Second operand 5 states and 79 transitions. [2021-06-10 15:49:05,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 20 transitions, 130 flow [2021-06-10 15:49:05,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 112 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-06-10 15:49:05,333 INFO L241 Difference]: Finished difference. Result has 35 places, 16 transitions, 79 flow [2021-06-10 15:49:05,334 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=16} [2021-06-10 15:49:05,334 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 11 predicate places. [2021-06-10 15:49:05,334 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 16 transitions, 79 flow [2021-06-10 15:49:05,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:05,334 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:05,334 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:05,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 15:49:05,334 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:05,335 INFO L82 PathProgramCache]: Analyzing trace with hash 927377144, now seen corresponding path program 5 times [2021-06-10 15:49:05,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:05,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872156797] [2021-06-10 15:49:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:05,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:05,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:05,422 INFO L142 QuantifierPusher]: treesize reduction 578, result has 24.3 percent of original size [2021-06-10 15:49:05,423 INFO L147 QuantifierPusher]: treesize reduction 11, result has 94.1 percent of original size 175 [2021-06-10 15:49:05,583 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-06-10 15:49:05,593 INFO L142 QuantifierPusher]: treesize reduction 1337, result has 28.7 percent of original size [2021-06-10 15:49:05,597 INFO L147 QuantifierPusher]: treesize reduction 91, result has 83.1 percent of original size 447 [2021-06-10 15:49:05,921 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2021-06-10 15:49:05,923 INFO L142 QuantifierPusher]: treesize reduction 11, result has 86.7 percent of original size [2021-06-10 15:49:05,924 INFO L147 QuantifierPusher]: treesize reduction 13, result has 81.9 percent of original size 59 [2021-06-10 15:49:05,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:05,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872156797] [2021-06-10 15:49:05,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:05,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:05,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749816948] [2021-06-10 15:49:05,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:05,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:05,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:05,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:05,978 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:05,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 16 transitions, 79 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:05,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:05,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:05,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:06,111 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-10 15:49:06,295 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-10 15:49:06,305 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-06-10 15:49:06,305 INFO L130 PetriNetUnfolder]: For 56/62 co-relation queries the response was YES. [2021-06-10 15:49:06,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 25 events. 0/25 cut-off events. For 56/62 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 45 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 15:49:06,305 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 3 selfloop transitions, 1 changer transitions 3/17 dead transitions. [2021-06-10 15:49:06,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 17 transitions, 102 flow [2021-06-10 15:49:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2021-06-10 15:49:06,307 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2021-06-10 15:49:06,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 77 transitions. [2021-06-10 15:49:06,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 77 transitions. [2021-06-10 15:49:06,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:06,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 77 transitions. [2021-06-10 15:49:06,308 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) [2021-06-10 15:49:06,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:06,308 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:06,308 INFO L185 Difference]: Start difference. First operand has 35 places, 16 transitions, 79 flow. Second operand 5 states and 77 transitions. [2021-06-10 15:49:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 17 transitions, 102 flow [2021-06-10 15:49:06,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 17 transitions, 90 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-06-10 15:49:06,310 INFO L241 Difference]: Finished difference. Result has 36 places, 14 transitions, 59 flow [2021-06-10 15:49:06,310 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=36, PETRI_TRANSITIONS=14} [2021-06-10 15:49:06,311 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2021-06-10 15:49:06,311 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 14 transitions, 59 flow [2021-06-10 15:49:06,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:06,311 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 15:49:06,311 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 15:49:06,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 15:49:06,311 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 15:49:06,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 15:49:06,312 INFO L82 PathProgramCache]: Analyzing trace with hash 213185016, now seen corresponding path program 6 times [2021-06-10 15:49:06,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 15:49:06,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539120107] [2021-06-10 15:49:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 15:49:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 15:49:06,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:06,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:07,426 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 535 DAG size of output: 358 [2021-06-10 15:49:07,427 INFO L142 QuantifierPusher]: treesize reduction 246688, result has 8.9 percent of original size [2021-06-10 15:49:07,574 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 311 [2021-06-10 15:49:07,575 INFO L147 QuantifierPusher]: treesize reduction 11029, result has 54.1 percent of original size 12987 [2021-06-10 15:49:08,531 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 48 [2021-06-10 15:49:08,563 INFO L142 QuantifierPusher]: treesize reduction 3063, result has 13.9 percent of original size [2021-06-10 15:49:08,568 INFO L147 QuantifierPusher]: treesize reduction 79, result has 84.0 percent of original size 415 [2021-06-10 15:49:08,693 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2021-06-10 15:49:08,696 INFO L142 QuantifierPusher]: treesize reduction 782, result has 13.8 percent of original size [2021-06-10 15:49:08,697 INFO L147 QuantifierPusher]: treesize reduction 8, result has 93.6 percent of original size 117 [2021-06-10 15:49:08,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 15:49:08,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 15:49:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 15:49:08,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539120107] [2021-06-10 15:49:08,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 15:49:08,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 15:49:08,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46730207] [2021-06-10 15:49:08,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-10 15:49:08,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 15:49:08,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-10 15:49:08,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-10 15:49:08,794 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 19 [2021-06-10 15:49:08,794 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 14 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:08,794 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 15:49:08,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 19 [2021-06-10 15:49:08,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 15:49:09,002 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-06-10 15:49:09,002 INFO L130 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2021-06-10 15:49:09,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 14 events. 0/14 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 15:49:09,003 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-06-10 15:49:09,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 13 transitions, 69 flow [2021-06-10 15:49:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-10 15:49:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-10 15:49:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-06-10 15:49:09,004 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2021-06-10 15:49:09,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-06-10 15:49:09,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-06-10 15:49:09,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 15:49:09,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-06-10 15:49:09,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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) [2021-06-10 15:49:09,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:09,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:09,005 INFO L185 Difference]: Start difference. First operand has 36 places, 14 transitions, 59 flow. Second operand 5 states and 75 transitions. [2021-06-10 15:49:09,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 13 transitions, 69 flow [2021-06-10 15:49:09,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 13 transitions, 51 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-06-10 15:49:09,006 INFO L241 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2021-06-10 15:49:09,006 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2021-06-10 15:49:09,007 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2021-06-10 15:49:09,007 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2021-06-10 15:49:09,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 15:49:09,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 15:49:09,011 INFO L202 PluginConnector]: Adding new model collitem-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 03:49:09 BasicIcfg [2021-06-10 15:49:09,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 15:49:09,012 INFO L168 Benchmark]: Toolchain (without parser) took 12257.75 ms. Allocated memory was 327.2 MB in the beginning and 574.6 MB in the end (delta: 247.5 MB). Free memory was 306.7 MB in the beginning and 520.4 MB in the end (delta: -213.6 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:09,012 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.81 ms. Allocated memory is still 327.2 MB. Free memory is still 307.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:49:09,013 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.78 ms. Allocated memory is still 327.2 MB. Free memory was 306.6 MB in the beginning and 305.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 15:49:09,013 INFO L168 Benchmark]: Boogie Preprocessor took 12.74 ms. Allocated memory is still 327.2 MB. Free memory was 305.1 MB in the beginning and 304.3 MB in the end (delta: 854.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:09,013 INFO L168 Benchmark]: RCFGBuilder took 364.05 ms. Allocated memory is still 327.2 MB. Free memory was 304.1 MB in the beginning and 287.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:09,014 INFO L168 Benchmark]: TraceAbstraction took 11855.94 ms. Allocated memory was 327.2 MB in the beginning and 574.6 MB in the end (delta: 247.5 MB). Free memory was 286.7 MB in the beginning and 520.4 MB in the end (delta: -233.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. [2021-06-10 15:49:09,016 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 0.81 ms. Allocated memory is still 327.2 MB. Free memory is still 307.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.78 ms. Allocated memory is still 327.2 MB. Free memory was 306.6 MB in the beginning and 305.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.74 ms. Allocated memory is still 327.2 MB. Free memory was 305.1 MB in the beginning and 304.3 MB in the end (delta: 854.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 364.05 ms. Allocated memory is still 327.2 MB. Free memory was 304.1 MB in the beginning and 287.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 11855.94 ms. Allocated memory was 327.2 MB in the beginning and 574.6 MB in the end (delta: 247.5 MB). Free memory was 286.7 MB in the beginning and 520.4 MB in the end (delta: -233.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 11729.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 2306.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 28 SDslu, 0 SDs, 0 SdLazy, 94 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 159.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7514.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=4, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.2ms SsaConstructionTime, 174.5ms SatisfiabilityAnalysisTime, 9084.5ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 4363 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...