/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 23:54:37,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 23:54:37,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 23:54:37,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 23:54:37,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 23:54:37,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 23:54:37,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 23:54:37,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 23:54:37,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 23:54:37,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 23:54:37,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 23:54:37,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 23:54:37,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 23:54:37,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 23:54:37,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 23:54:37,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 23:54:37,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 23:54:37,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 23:54:37,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 23:54:37,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 23:54:37,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 23:54:37,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 23:54:37,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 23:54:37,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 23:54:37,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-10 23:54:37,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-10 23:54:37,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-10 23:54:37,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-10 23:54:37,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-10 23:54:37,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-10 23:54:37,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 23:54:37,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 23:54:37,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 23:54:37,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 23:54:37,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 23:54:37,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 23:54:37,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 23:54:37,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-10 23:54:37,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 23:54:37,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 23:54:37,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 23:54:37,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-06-10 23:54:37,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 23:54:37,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 23:54:37,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 23:54:37,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 23:54:37,280 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 23:54:37,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 23:54:37,280 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 23:54:37,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 23:54:37,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 23:54:37,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 23:54:37,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 23:54:37,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 23:54:37,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 23:54:37,282 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 23:54:37,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 23:54:37,282 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 23:54:37,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 23:54:37,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 23:54:37,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 23:54:37,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 23:54:37,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 23:54:37,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 23:54:37,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 23:54:37,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 23:54:37,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 23:54:37,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 23:54:37,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 23:54:37,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 23:54:37,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 23:54:37,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 23:54:37,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 23:54:37,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 23:54:37,581 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 23:54:37,582 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 23:54:37,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl [2021-06-10 23:54:37,583 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_nondet_loop_bound.bpl' [2021-06-10 23:54:37,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 23:54:37,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 23:54:37,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 23:54:37,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 23:54:37,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 23:54:37,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 23:54:37,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 23:54:37,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 23:54:37,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 23:54:37,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/1) ... [2021-06-10 23:54:37,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 23:54:37,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 23:54:37,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 23:54:37,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 23:54:37,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (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 23:54:37,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 23:54:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 23:54:37,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 23:54:37,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-10 23:54:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-10 23:54:37,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-10 23:54:37,705 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 23:54:37,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 23:54:37,817 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 23:54:37,818 INFO L202 PluginConnector]: Adding new model pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:54:37 BoogieIcfgContainer [2021-06-10 23:54:37,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 23:54:37,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 23:54:37,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 23:54:37,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 23:54:37,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:54:37" (1/2) ... [2021-06-10 23:54:37,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ab9cec and model type pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 11:54:37, skipping insertion in model container [2021-06-10 23:54:37,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_nondet_loop_bound.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:54:37" (2/2) ... [2021-06-10 23:54:37,824 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread_nondet_loop_bound.bpl [2021-06-10 23:54:37,828 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 23:54:37,831 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 23:54:37,832 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 23:54:37,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:37,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:37,846 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:37,847 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:37,849 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:37,852 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 23:54:37,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-10 23:54:37,883 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 23:54:37,884 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 23:54:37,884 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 23:54:37,884 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 23:54:37,884 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 23:54:37,884 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 23:54:37,884 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 23:54:37,884 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 23:54:37,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 13 transitions, 31 flow [2021-06-10 23:54:37,906 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 23:54:37,906 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:54:37,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 23:54:37,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 13 transitions, 31 flow [2021-06-10 23:54:37,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 13 transitions, 31 flow [2021-06-10 23:54:37,911 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-10 23:54:37,922 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 13 transitions, 31 flow [2021-06-10 23:54:37,925 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 13 transitions, 31 flow [2021-06-10 23:54:37,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 13 transitions, 31 flow [2021-06-10 23:54:37,931 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 23:54:37,931 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:54:37,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 23:54:37,932 INFO L151 LiptonReduction]: Number of co-enabled transitions 50 [2021-06-10 23:54:37,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:54:38,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:54:38,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:54:38,240 INFO L163 LiptonReduction]: Checked pairs total: 28 [2021-06-10 23:54:38,240 INFO L165 LiptonReduction]: Total number of compositions: 7 [2021-06-10 23:54:38,244 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 334 [2021-06-10 23:54:38,266 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 23:54:38,266 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:54:38,266 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:38,267 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-10 23:54:38,267 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:54:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1984598, now seen corresponding path program 1 times [2021-06-10 23:54:38,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:38,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068429582] [2021-06-10 23:54:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:38,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:38,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:38,412 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 23:54:38,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068429582] [2021-06-10 23:54:38,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:54:38,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-10 23:54:38,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578997568] [2021-06-10 23:54:38,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 23:54:38,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:54:38,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 23:54:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-10 23:54:38,448 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2021-06-10 23:54:38,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 23:54:38,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:54:38,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2021-06-10 23:54:38,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:54:38,514 INFO L129 PetriNetUnfolder]: 4/17 cut-off events. [2021-06-10 23:54:38,514 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 23:54:38,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 17 events. 4/17 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 28 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 20. Up to 10 conditions per place. [2021-06-10 23:54:38,518 INFO L132 encePairwiseOnDemand]: 16/20 looper letters, 5 selfloop transitions, 3 changer transitions 5/13 dead transitions. [2021-06-10 23:54:38,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 13 transitions, 59 flow [2021-06-10 23:54:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 23:54:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 23:54:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 26 transitions. [2021-06-10 23:54:38,528 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.325 [2021-06-10 23:54:38,529 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 26 transitions. [2021-06-10 23:54:38,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 26 transitions. [2021-06-10 23:54:38,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:54:38,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 26 transitions. [2021-06-10 23:54:38,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 23:54:38,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 23:54:38,536 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 23:54:38,537 INFO L185 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 4 states and 26 transitions. [2021-06-10 23:54:38,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 13 transitions, 59 flow [2021-06-10 23:54:38,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 23:54:38,540 INFO L241 Difference]: Finished difference. Result has 13 places, 6 transitions, 23 flow [2021-06-10 23:54:38,542 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=23, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2021-06-10 23:54:38,543 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 2 predicate places. [2021-06-10 23:54:38,543 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 23 flow [2021-06-10 23:54:38,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 23:54:38,543 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:38,543 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-06-10 23:54:38,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 23:54:38,544 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:54:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash 61521954, now seen corresponding path program 1 times [2021-06-10 23:54:38,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:38,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858322726] [2021-06-10 23:54:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:54:38,550 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:54:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:54:38,554 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:54:38,564 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 23:54:38,564 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 23:54:38,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 23:54:38,566 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 23:54:38,566 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-10 23:54:38,570 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,570 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,571 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,571 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,572 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,572 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,572 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,573 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,574 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,575 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:38,576 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 23:54:38,576 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-10 23:54:38,580 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 23:54:38,580 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 23:54:38,580 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 23:54:38,581 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 23:54:38,581 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 23:54:38,581 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 23:54:38,581 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 23:54:38,581 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 23:54:38,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 50 flow [2021-06-10 23:54:38,595 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-06-10 23:54:38,598 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 23:54:38,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 26 events. 0/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 23:54:38,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 50 flow [2021-06-10 23:54:38,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2021-06-10 23:54:38,603 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-10 23:54:38,603 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 19 transitions, 50 flow [2021-06-10 23:54:38,603 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 19 transitions, 50 flow [2021-06-10 23:54:38,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 50 flow [2021-06-10 23:54:38,614 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-06-10 23:54:38,614 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-10 23:54:38,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 26 events. 0/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 23:54:38,615 INFO L151 LiptonReduction]: Number of co-enabled transitions 160 [2021-06-10 23:54:38,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:54:38,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:54:38,730 INFO L163 LiptonReduction]: Checked pairs total: 248 [2021-06-10 23:54:38,731 INFO L165 LiptonReduction]: Total number of compositions: 5 [2021-06-10 23:54:38,731 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 128 [2021-06-10 23:54:38,737 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-06-10 23:54:38,737 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 23:54:38,737 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:38,738 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-10 23:54:38,738 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:54:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:38,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1446685504, now seen corresponding path program 1 times [2021-06-10 23:54:38,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:38,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730070836] [2021-06-10 23:54:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:38,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:38,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:38,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:38,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:38,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:38,786 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 23:54:38,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730070836] [2021-06-10 23:54:38,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:54:38,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 23:54:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064384587] [2021-06-10 23:54:38,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 23:54:38,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:54:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 23:54:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-10 23:54:38,789 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2021-06-10 23:54:38,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 23:54:38,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:54:38,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2021-06-10 23:54:38,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:54:39,020 INFO L129 PetriNetUnfolder]: 248/493 cut-off events. [2021-06-10 23:54:39,020 INFO L130 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2021-06-10 23:54:39,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 493 events. 248/493 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2446 event pairs, 29 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 726. Up to 151 conditions per place. [2021-06-10 23:54:39,026 INFO L132 encePairwiseOnDemand]: 14/24 looper letters, 44 selfloop transitions, 17 changer transitions 5/66 dead transitions. [2021-06-10 23:54:39,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 66 transitions, 306 flow [2021-06-10 23:54:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 23:54:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 23:54:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2021-06-10 23:54:39,029 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.475 [2021-06-10 23:54:39,029 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 114 transitions. [2021-06-10 23:54:39,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 114 transitions. [2021-06-10 23:54:39,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:54:39,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 114 transitions. [2021-06-10 23:54:39,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.4) internal successors, (114), 10 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 23:54:39,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 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 23:54:39,032 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 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 23:54:39,032 INFO L185 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 10 states and 114 transitions. [2021-06-10 23:54:39,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 66 transitions, 306 flow [2021-06-10 23:54:39,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 66 transitions, 294 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-06-10 23:54:39,035 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 173 flow [2021-06-10 23:54:39,035 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=173, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2021-06-10 23:54:39,035 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2021-06-10 23:54:39,035 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 173 flow [2021-06-10 23:54:39,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 23:54:39,035 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:39,035 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2021-06-10 23:54:39,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 23:54:39,036 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:54:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1296929797, now seen corresponding path program 1 times [2021-06-10 23:54:39,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:39,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089853714] [2021-06-10 23:54:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:54:39,042 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:54:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:54:39,045 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:54:39,049 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 23:54:39,049 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 23:54:39,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 23:54:39,049 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 23:54:39,050 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-10 23:54:39,054 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,055 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,055 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,055 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,055 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,055 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,056 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,056 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,056 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,056 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,056 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,057 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,057 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,064 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,066 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:54:39,067 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 23:54:39,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-10 23:54:39,068 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 23:54:39,068 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 23:54:39,068 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 23:54:39,069 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 23:54:39,069 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 23:54:39,069 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 23:54:39,069 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 23:54:39,069 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 23:54:39,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2021-06-10 23:54:39,075 INFO L129 PetriNetUnfolder]: 0/36 cut-off events. [2021-06-10 23:54:39,075 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-10 23:54:39,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 36 events. 0/36 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 23:54:39,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 25 transitions, 71 flow [2021-06-10 23:54:39,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 25 transitions, 71 flow [2021-06-10 23:54:39,076 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-10 23:54:39,076 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 25 transitions, 71 flow [2021-06-10 23:54:39,076 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 25 transitions, 71 flow [2021-06-10 23:54:39,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 25 transitions, 71 flow [2021-06-10 23:54:39,079 INFO L129 PetriNetUnfolder]: 0/36 cut-off events. [2021-06-10 23:54:39,079 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-10 23:54:39,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 36 events. 0/36 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-10 23:54:39,080 INFO L151 LiptonReduction]: Number of co-enabled transitions 330 [2021-06-10 23:54:39,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:54:39,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:54:39,233 INFO L163 LiptonReduction]: Checked pairs total: 618 [2021-06-10 23:54:39,234 INFO L165 LiptonReduction]: Total number of compositions: 6 [2021-06-10 23:54:39,234 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 158 [2021-06-10 23:54:39,236 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-06-10 23:54:39,236 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 23:54:39,236 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:39,236 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-10 23:54:39,236 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:54:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -387248033, now seen corresponding path program 1 times [2021-06-10 23:54:39,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:39,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408918049] [2021-06-10 23:54:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:39,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:39,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:39,255 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:39,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:39,264 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 23:54:39,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408918049] [2021-06-10 23:54:39,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:54:39,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 23:54:39,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348508118] [2021-06-10 23:54:39,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 23:54:39,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:54:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 23:54:39,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-10 23:54:39,266 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2021-06-10 23:54:39,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 23:54:39,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:54:39,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2021-06-10 23:54:39,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:54:39,759 INFO L129 PetriNetUnfolder]: 2853/4577 cut-off events. [2021-06-10 23:54:39,759 INFO L130 PetriNetUnfolder]: For 1921/1921 co-relation queries the response was YES. [2021-06-10 23:54:39,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10174 conditions, 4577 events. 2853/4577 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27391 event pairs, 431 based on Foata normal form. 0/3585 useless extension candidates. Maximal degree in co-relation 5492. Up to 1275 conditions per place. [2021-06-10 23:54:39,794 INFO L132 encePairwiseOnDemand]: 18/31 looper letters, 75 selfloop transitions, 28 changer transitions 1/104 dead transitions. [2021-06-10 23:54:39,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 104 transitions, 512 flow [2021-06-10 23:54:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 23:54:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 23:54:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2021-06-10 23:54:39,800 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.535483870967742 [2021-06-10 23:54:39,800 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 166 transitions. [2021-06-10 23:54:39,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 166 transitions. [2021-06-10 23:54:39,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:54:39,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 166 transitions. [2021-06-10 23:54:39,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 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 23:54:39,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 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 23:54:39,806 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 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 23:54:39,806 INFO L185 Difference]: Start difference. First operand has 27 places, 20 transitions, 61 flow. Second operand 10 states and 166 transitions. [2021-06-10 23:54:39,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 104 transitions, 512 flow [2021-06-10 23:54:39,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 104 transitions, 476 flow, removed 18 selfloop flow, removed 0 redundant places. [2021-06-10 23:54:39,812 INFO L241 Difference]: Finished difference. Result has 44 places, 50 transitions, 279 flow [2021-06-10 23:54:39,812 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=279, PETRI_PLACES=44, PETRI_TRANSITIONS=50} [2021-06-10 23:54:39,812 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2021-06-10 23:54:39,812 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 50 transitions, 279 flow [2021-06-10 23:54:39,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 23:54:39,812 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:39,812 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:54:39,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 23:54:39,813 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:54:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash -758475341, now seen corresponding path program 1 times [2021-06-10 23:54:39,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:39,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210258300] [2021-06-10 23:54:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:39,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:39,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:39,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:39,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-10 23:54:39,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210258300] [2021-06-10 23:54:39,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854778788] [2021-06-10 23:54:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:54:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-10 23:54:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-10 23:54:39,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,931 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:39,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:39,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:39,980 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:39,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:39,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:39,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:39,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:39,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:40,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:40,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:40,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:40,057 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:40,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:40,064 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:40,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:40,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:40,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:40,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:40,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:54:40,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-10 23:54:40,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-06-10 23:54:40,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314416183] [2021-06-10 23:54:40,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 23:54:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:54:40,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 23:54:40,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-10 23:54:40,124 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2021-06-10 23:54:40,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 279 flow. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 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 23:54:40,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:54:40,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2021-06-10 23:54:40,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:54:41,233 INFO L129 PetriNetUnfolder]: 4714/7936 cut-off events. [2021-06-10 23:54:41,234 INFO L130 PetriNetUnfolder]: For 11791/11791 co-relation queries the response was YES. [2021-06-10 23:54:41,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29694 conditions, 7936 events. 4714/7936 cut-off events. For 11791/11791 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 57068 event pairs, 1086 based on Foata normal form. 345/8281 useless extension candidates. Maximal degree in co-relation 15570. Up to 2014 conditions per place. [2021-06-10 23:54:41,304 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 120 selfloop transitions, 88 changer transitions 2/210 dead transitions. [2021-06-10 23:54:41,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 210 transitions, 1527 flow [2021-06-10 23:54:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-10 23:54:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-06-10 23:54:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 211 transitions. [2021-06-10 23:54:41,307 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.4861751152073733 [2021-06-10 23:54:41,307 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 211 transitions. [2021-06-10 23:54:41,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 211 transitions. [2021-06-10 23:54:41,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:54:41,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 211 transitions. [2021-06-10 23:54:41,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 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 23:54:41,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 31.0) internal successors, (465), 15 states have internal predecessors, (465), 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 23:54:41,311 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 31.0) internal successors, (465), 15 states have internal predecessors, (465), 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 23:54:41,311 INFO L185 Difference]: Start difference. First operand has 44 places, 50 transitions, 279 flow. Second operand 14 states and 211 transitions. [2021-06-10 23:54:41,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 210 transitions, 1527 flow [2021-06-10 23:54:41,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 210 transitions, 1527 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 23:54:41,454 INFO L241 Difference]: Finished difference. Result has 66 places, 125 transitions, 1116 flow [2021-06-10 23:54:41,454 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1116, PETRI_PLACES=66, PETRI_TRANSITIONS=125} [2021-06-10 23:54:41,454 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 39 predicate places. [2021-06-10 23:54:41,454 INFO L480 AbstractCegarLoop]: Abstraction has has 66 places, 125 transitions, 1116 flow [2021-06-10 23:54:41,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 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 23:54:41,454 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:41,455 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:54:41,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-10 23:54:41,679 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:54:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash -726262263, now seen corresponding path program 1 times [2021-06-10 23:54:41,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:41,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041399918] [2021-06-10 23:54:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:41,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:41,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:41,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:41,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:41,731 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:41,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:41,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:54:41,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041399918] [2021-06-10 23:54:41,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947425609] [2021-06-10 23:54:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:54:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-10 23:54:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-10 23:54:41,789 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,815 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,816 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,817 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:41,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:41,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:41,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:41,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:41,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:41,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:41,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:41,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:41,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:41,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:41,870 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:41,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:41,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:41,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:41,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:41,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:41,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:41,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:41,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:41,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:41,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:41,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:41,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:41,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:54:41,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-10 23:54:41,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-06-10 23:54:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200650481] [2021-06-10 23:54:41,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-10 23:54:41,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:54:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-10 23:54:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-10 23:54:41,970 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2021-06-10 23:54:41,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 125 transitions, 1116 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 23:54:41,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:54:41,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2021-06-10 23:54:41,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:54:45,928 INFO L129 PetriNetUnfolder]: 13050/22325 cut-off events. [2021-06-10 23:54:45,928 INFO L130 PetriNetUnfolder]: For 84537/84537 co-relation queries the response was YES. [2021-06-10 23:54:46,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116405 conditions, 22325 events. 13050/22325 cut-off events. For 84537/84537 co-relation queries the response was YES. Maximal size of possible extension queue 1891. Compared 192267 event pairs, 1214 based on Foata normal form. 369/22694 useless extension candidates. Maximal degree in co-relation 112582. Up to 7603 conditions per place. [2021-06-10 23:54:46,130 INFO L132 encePairwiseOnDemand]: 15/31 looper letters, 457 selfloop transitions, 436 changer transitions 6/899 dead transitions. [2021-06-10 23:54:46,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 899 transitions, 9332 flow [2021-06-10 23:54:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-10 23:54:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-06-10 23:54:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 831 transitions. [2021-06-10 23:54:46,135 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.496415770609319 [2021-06-10 23:54:46,135 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 831 transitions. [2021-06-10 23:54:46,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 831 transitions. [2021-06-10 23:54:46,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:54:46,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 831 transitions. [2021-06-10 23:54:46,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 15.38888888888889) internal successors, (831), 54 states have internal predecessors, (831), 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 23:54:46,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 31.0) internal successors, (1705), 55 states have internal predecessors, (1705), 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 23:54:46,142 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 31.0) internal successors, (1705), 55 states have internal predecessors, (1705), 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 23:54:46,142 INFO L185 Difference]: Start difference. First operand has 66 places, 125 transitions, 1116 flow. Second operand 54 states and 831 transitions. [2021-06-10 23:54:46,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 899 transitions, 9332 flow [2021-06-10 23:54:47,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 899 transitions, 9324 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-06-10 23:54:47,575 INFO L241 Difference]: Finished difference. Result has 149 places, 518 transitions, 6371 flow [2021-06-10 23:54:47,576 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6371, PETRI_PLACES=149, PETRI_TRANSITIONS=518} [2021-06-10 23:54:47,576 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 122 predicate places. [2021-06-10 23:54:47,576 INFO L480 AbstractCegarLoop]: Abstraction has has 149 places, 518 transitions, 6371 flow [2021-06-10 23:54:47,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 23:54:47,576 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:54:47,576 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:54:47,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:54:47,798 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:54:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:54:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1254405143, now seen corresponding path program 2 times [2021-06-10 23:54:47,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:54:47,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332869259] [2021-06-10 23:54:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:54:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:54:47,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:47,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:47,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:47,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:47,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:47,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:54:47,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:54:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:54:47,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332869259] [2021-06-10 23:54:47,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397806115] [2021-06-10 23:54:47,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:54:47,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-10 23:54:47,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-10 23:54:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-10 23:54:47,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-10 23:54:47,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,920 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:47,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:47,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:47,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:47,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:47,931 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:47,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:47,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:47,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:47,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,966 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,968 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:47,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:47,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:47,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:47,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:47,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:47,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:47,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:47,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:47,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:48,004 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:54:48,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:48,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:48,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:48,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:48,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:48,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:54:48,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:54:48,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:54:48,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:54:48,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:48,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:54:48,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:54:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:54:48,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-10 23:54:48,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-06-10 23:54:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218263958] [2021-06-10 23:54:48,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-10 23:54:48,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:54:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-10 23:54:48,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-10 23:54:48,050 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2021-06-10 23:54:48,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 518 transitions, 6371 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 23:54:48,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:54:48,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2021-06-10 23:54:48,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:54:55,445 INFO L129 PetriNetUnfolder]: 20548/35687 cut-off events. [2021-06-10 23:54:55,445 INFO L130 PetriNetUnfolder]: For 685894/685894 co-relation queries the response was YES. [2021-06-10 23:54:55,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 297859 conditions, 35687 events. 20548/35687 cut-off events. For 685894/685894 co-relation queries the response was YES. Maximal size of possible extension queue 3178. Compared 335414 event pairs, 2225 based on Foata normal form. 342/36029 useless extension candidates. Maximal degree in co-relation 274134. Up to 13218 conditions per place. [2021-06-10 23:54:55,965 INFO L132 encePairwiseOnDemand]: 15/31 looper letters, 505 selfloop transitions, 901 changer transitions 20/1426 dead transitions. [2021-06-10 23:54:55,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 1426 transitions, 20886 flow [2021-06-10 23:54:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-10 23:54:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-06-10 23:54:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 463 transitions. [2021-06-10 23:54:55,969 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.46673387096774194 [2021-06-10 23:54:55,969 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 463 transitions. [2021-06-10 23:54:55,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 463 transitions. [2021-06-10 23:54:55,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:54:55,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 463 transitions. [2021-06-10 23:54:55,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 14.46875) internal successors, (463), 32 states have internal predecessors, (463), 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 23:54:55,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 31.0) internal successors, (1023), 33 states have internal predecessors, (1023), 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 23:54:55,974 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 31.0) internal successors, (1023), 33 states have internal predecessors, (1023), 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 23:54:55,974 INFO L185 Difference]: Start difference. First operand has 149 places, 518 transitions, 6371 flow. Second operand 32 states and 463 transitions. [2021-06-10 23:54:55,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 1426 transitions, 20886 flow [2021-06-10 23:55:05,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 1426 transitions, 20132 flow, removed 337 selfloop flow, removed 4 redundant places. [2021-06-10 23:55:05,605 INFO L241 Difference]: Finished difference. Result has 192 places, 1077 transitions, 16538 flow [2021-06-10 23:55:05,606 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6118, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=16538, PETRI_PLACES=192, PETRI_TRANSITIONS=1077} [2021-06-10 23:55:05,606 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 165 predicate places. [2021-06-10 23:55:05,606 INFO L480 AbstractCegarLoop]: Abstraction has has 192 places, 1077 transitions, 16538 flow [2021-06-10 23:55:05,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 23:55:05,606 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:55:05,606 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:55:05,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:55:05,822 INFO L428 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:55:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:55:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1058087149, now seen corresponding path program 3 times [2021-06-10 23:55:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:55:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987722467] [2021-06-10 23:55:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:55:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:55:05,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,838 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:55:05,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:05,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:05,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:05,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:05,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:05,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:55:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:55:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987722467] [2021-06-10 23:55:05,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318232436] [2021-06-10 23:55:05,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:55:05,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-10 23:55:05,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-10 23:55:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-10 23:55:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-10 23:55:05,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,931 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:05,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:55:05,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:55:05,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:05,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:55:05,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:55:05,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:55:05,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:05,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:05,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:55:05,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:05,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:05,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:05,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:05,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:55:05,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:55:05,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:05,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:05,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:06,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:55:06,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:06,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:06,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:06,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:06,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:06,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:06,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:06,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:55:06,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:55:06,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:06,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:06,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:55:06,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-10 23:55:06,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-06-10 23:55:06,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833474439] [2021-06-10 23:55:06,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-10 23:55:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:55:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-10 23:55:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-10 23:55:06,044 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2021-06-10 23:55:06,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 1077 transitions, 16538 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 23:55:06,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:55:06,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2021-06-10 23:55:06,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:55:21,280 INFO L129 PetriNetUnfolder]: 28900/49873 cut-off events. [2021-06-10 23:55:21,280 INFO L130 PetriNetUnfolder]: For 1395615/1395615 co-relation queries the response was YES. [2021-06-10 23:55:21,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 480809 conditions, 49873 events. 28900/49873 cut-off events. For 1395615/1395615 co-relation queries the response was YES. Maximal size of possible extension queue 4488. Compared 485818 event pairs, 2405 based on Foata normal form. 381/50254 useless extension candidates. Maximal degree in co-relation 465873. Up to 18844 conditions per place. [2021-06-10 23:55:22,199 INFO L132 encePairwiseOnDemand]: 15/31 looper letters, 643 selfloop transitions, 1257 changer transitions 28/1928 dead transitions. [2021-06-10 23:55:22,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1928 transitions, 33525 flow [2021-06-10 23:55:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-10 23:55:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-06-10 23:55:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 564 transitions. [2021-06-10 23:55:22,201 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.45483870967741935 [2021-06-10 23:55:22,201 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 564 transitions. [2021-06-10 23:55:22,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 564 transitions. [2021-06-10 23:55:22,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:55:22,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 564 transitions. [2021-06-10 23:55:22,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 14.1) internal successors, (564), 40 states have internal predecessors, (564), 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 23:55:22,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 31.0) internal successors, (1271), 41 states have internal predecessors, (1271), 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 23:55:22,205 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 31.0) internal successors, (1271), 41 states have internal predecessors, (1271), 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 23:55:22,206 INFO L185 Difference]: Start difference. First operand has 192 places, 1077 transitions, 16538 flow. Second operand 40 states and 564 transitions. [2021-06-10 23:55:22,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1928 transitions, 33525 flow [2021-06-10 23:55:53,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1928 transitions, 33260 flow, removed 114 selfloop flow, removed 4 redundant places. [2021-06-10 23:55:53,668 INFO L241 Difference]: Finished difference. Result has 251 places, 1513 transitions, 28080 flow [2021-06-10 23:55:53,669 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=16324, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=846, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=28080, PETRI_PLACES=251, PETRI_TRANSITIONS=1513} [2021-06-10 23:55:53,669 INFO L343 CegarLoopForPetriNet]: 27 programPoint places, 224 predicate places. [2021-06-10 23:55:53,669 INFO L480 AbstractCegarLoop]: Abstraction has has 251 places, 1513 transitions, 28080 flow [2021-06-10 23:55:53,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 23:55:53,669 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:55:53,669 INFO L263 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-06-10 23:55:53,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:55:53,870 INFO L428 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:55:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:55:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash 213871024, now seen corresponding path program 1 times [2021-06-10 23:55:53,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:55:53,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233243010] [2021-06-10 23:55:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:55:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:55:53,876 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:55:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:55:53,879 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:55:53,881 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 23:55:53,881 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 23:55:53,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-10 23:55:53,881 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-10 23:55:53,881 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-10 23:55:53,887 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,887 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,887 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,887 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,887 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,887 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,888 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,888 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,888 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,888 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,888 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,888 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,888 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,889 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,889 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,889 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,889 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,890 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,891 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,891 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:55:53,892 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 23:55:53,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-10 23:55:53,893 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 23:55:53,893 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 23:55:53,893 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 23:55:53,893 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 23:55:53,893 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 23:55:53,893 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 23:55:53,893 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 23:55:53,893 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 23:55:53,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 31 transitions, 94 flow [2021-06-10 23:55:53,896 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-06-10 23:55:53,896 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-06-10 23:55:53,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 46 events. 0/46 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-06-10 23:55:53,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 31 transitions, 94 flow [2021-06-10 23:55:53,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 31 transitions, 94 flow [2021-06-10 23:55:53,897 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-10 23:55:53,897 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 31 transitions, 94 flow [2021-06-10 23:55:53,897 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 31 transitions, 94 flow [2021-06-10 23:55:53,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 31 transitions, 94 flow [2021-06-10 23:55:53,899 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-06-10 23:55:53,899 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-06-10 23:55:53,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 46 events. 0/46 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 102 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-06-10 23:55:53,900 INFO L151 LiptonReduction]: Number of co-enabled transitions 560 [2021-06-10 23:55:53,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:53,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:55:53,966 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:53,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:55:54,017 INFO L163 LiptonReduction]: Checked pairs total: 1062 [2021-06-10 23:55:54,017 INFO L165 LiptonReduction]: Total number of compositions: 7 [2021-06-10 23:55:54,017 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 120 [2021-06-10 23:55:54,019 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-06-10 23:55:54,019 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 23:55:54,019 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:55:54,019 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-10 23:55:54,019 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:55:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:55:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash 907887886, now seen corresponding path program 1 times [2021-06-10 23:55:54,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:55:54,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784288400] [2021-06-10 23:55:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:55:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:55:54,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:54,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:55:54,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:54,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:54,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:54,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:54,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:54,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:55:54,043 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 23:55:54,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784288400] [2021-06-10 23:55:54,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:55:54,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 23:55:54,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820363949] [2021-06-10 23:55:54,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 23:55:54,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:55:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 23:55:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-10 23:55:54,045 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 38 [2021-06-10 23:55:54,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 23:55:54,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:55:54,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 38 [2021-06-10 23:55:54,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:55:56,057 INFO L129 PetriNetUnfolder]: 24171/34574 cut-off events. [2021-06-10 23:55:56,057 INFO L130 PetriNetUnfolder]: For 19469/19469 co-relation queries the response was YES. [2021-06-10 23:55:56,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77307 conditions, 34574 events. 24171/34574 cut-off events. For 19469/19469 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 224705 event pairs, 4270 based on Foata normal form. 0/27670 useless extension candidates. Maximal degree in co-relation 32176. Up to 10417 conditions per place. [2021-06-10 23:55:56,264 INFO L132 encePairwiseOnDemand]: 22/38 looper letters, 97 selfloop transitions, 36 changer transitions 1/134 dead transitions. [2021-06-10 23:55:56,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 134 transitions, 698 flow [2021-06-10 23:55:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-10 23:55:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-10 23:55:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2021-06-10 23:55:56,265 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2021-06-10 23:55:56,266 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 210 transitions. [2021-06-10 23:55:56,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 210 transitions. [2021-06-10 23:55:56,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:55:56,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 210 transitions. [2021-06-10 23:55:56,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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 23:55:56,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 38.0) internal successors, (418), 11 states have internal predecessors, (418), 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 23:55:56,267 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 38.0) internal successors, (418), 11 states have internal predecessors, (418), 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 23:55:56,267 INFO L185 Difference]: Start difference. First operand has 34 places, 25 transitions, 82 flow. Second operand 10 states and 210 transitions. [2021-06-10 23:55:56,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 134 transitions, 698 flow [2021-06-10 23:55:56,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 134 transitions, 626 flow, removed 36 selfloop flow, removed 0 redundant places. [2021-06-10 23:55:56,274 INFO L241 Difference]: Finished difference. Result has 51 places, 64 transitions, 359 flow [2021-06-10 23:55:56,274 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=359, PETRI_PLACES=51, PETRI_TRANSITIONS=64} [2021-06-10 23:55:56,274 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2021-06-10 23:55:56,274 INFO L480 AbstractCegarLoop]: Abstraction has has 51 places, 64 transitions, 359 flow [2021-06-10 23:55:56,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 23:55:56,274 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:55:56,274 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:55:56,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-10 23:55:56,274 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:55:56,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:55:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1092570596, now seen corresponding path program 1 times [2021-06-10 23:55:56,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:55:56,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169626783] [2021-06-10 23:55:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:55:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:55:56,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:55:56,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:56,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:55:56,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:55:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-10 23:55:56,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169626783] [2021-06-10 23:55:56,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492818912] [2021-06-10 23:55:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:55:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:55:56,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-10 23:55:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-10 23:55:56,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:56,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:55:56,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:55:56,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:56,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:55:56,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:55:56,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:55:56,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:56,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:56,384 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:55:56,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:56,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:56,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:55:56,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:55:56,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:55:56,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:55:56,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:55:56,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:55:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:55:56,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-10 23:55:56,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-06-10 23:55:56,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914504604] [2021-06-10 23:55:56,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-10 23:55:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:55:56,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-10 23:55:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-10 23:55:56,443 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 38 [2021-06-10 23:55:56,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 64 transitions, 359 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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 23:55:56,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:55:56,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 38 [2021-06-10 23:55:56,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:56:01,906 INFO L129 PetriNetUnfolder]: 47079/69196 cut-off events. [2021-06-10 23:56:01,906 INFO L130 PetriNetUnfolder]: For 98759/98759 co-relation queries the response was YES. [2021-06-10 23:56:02,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254817 conditions, 69196 events. 47079/69196 cut-off events. For 98759/98759 co-relation queries the response was YES. Maximal size of possible extension queue 3693. Compared 523408 event pairs, 11085 based on Foata normal form. 2349/71545 useless extension candidates. Maximal degree in co-relation 128424. Up to 17803 conditions per place. [2021-06-10 23:56:02,439 INFO L132 encePairwiseOnDemand]: 21/38 looper letters, 160 selfloop transitions, 122 changer transitions 2/284 dead transitions. [2021-06-10 23:56:02,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 284 transitions, 2071 flow [2021-06-10 23:56:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-10 23:56:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-06-10 23:56:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 265 transitions. [2021-06-10 23:56:02,441 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.4981203007518797 [2021-06-10 23:56:02,441 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 265 transitions. [2021-06-10 23:56:02,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 265 transitions. [2021-06-10 23:56:02,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:56:02,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 265 transitions. [2021-06-10 23:56:02,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 18.928571428571427) internal successors, (265), 14 states have internal predecessors, (265), 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 23:56:02,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 38.0) internal successors, (570), 15 states have internal predecessors, (570), 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 23:56:02,443 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 38.0) internal successors, (570), 15 states have internal predecessors, (570), 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 23:56:02,443 INFO L185 Difference]: Start difference. First operand has 51 places, 64 transitions, 359 flow. Second operand 14 states and 265 transitions. [2021-06-10 23:56:02,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 284 transitions, 2071 flow [2021-06-10 23:56:05,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 284 transitions, 2071 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-06-10 23:56:05,581 INFO L241 Difference]: Finished difference. Result has 73 places, 171 transitions, 1542 flow [2021-06-10 23:56:05,581 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1542, PETRI_PLACES=73, PETRI_TRANSITIONS=171} [2021-06-10 23:56:05,581 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2021-06-10 23:56:05,581 INFO L480 AbstractCegarLoop]: Abstraction has has 73 places, 171 transitions, 1542 flow [2021-06-10 23:56:05,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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 23:56:05,582 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:56:05,582 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:56:05,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-10 23:56:05,789 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:56:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:56:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash -255136764, now seen corresponding path program 1 times [2021-06-10 23:56:05,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:56:05,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912420279] [2021-06-10 23:56:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:56:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:56:05,817 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:56:05,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:56:05,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:56:05,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:56:05,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:56:05,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:56:05,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:56:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:56:05,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912420279] [2021-06-10 23:56:05,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211442460] [2021-06-10 23:56:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-10 23:56:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:56:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-10 23:56:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:56:05,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:05,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:05,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,261 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:56:06,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:56:06,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:56:06,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:56:06,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:56:06,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:56:06,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:56:06,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:56:06,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:56:06,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:56:06,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:56:06,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:56:06,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:56:06,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:56:06,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:56:06,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:56:06,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:56:06,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:56:06,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:56:06,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:56:06,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:56:06,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:56:06,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:56:06,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:56:06,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:56:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:56:06,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-10 23:56:06,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-06-10 23:56:06,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081703570] [2021-06-10 23:56:06,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-10 23:56:06,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:56:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-10 23:56:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-10 23:56:06,367 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 38 [2021-06-10 23:56:06,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 171 transitions, 1542 flow. Second operand has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 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 23:56:06,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:56:06,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 38 [2021-06-10 23:56:06,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:56:34,495 INFO L129 PetriNetUnfolder]: 127980/190652 cut-off events. [2021-06-10 23:56:34,496 INFO L130 PetriNetUnfolder]: For 637759/637759 co-relation queries the response was YES. [2021-06-10 23:56:35,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 978929 conditions, 190652 events. 127980/190652 cut-off events. For 637759/637759 co-relation queries the response was YES. Maximal size of possible extension queue 10571. Compared 1663333 event pairs, 12490 based on Foata normal form. 2322/192974 useless extension candidates. Maximal degree in co-relation 975171. Up to 60868 conditions per place. [2021-06-10 23:56:36,354 INFO L132 encePairwiseOnDemand]: 19/38 looper letters, 647 selfloop transitions, 612 changer transitions 1/1260 dead transitions. [2021-06-10 23:56:36,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 1260 transitions, 12969 flow [2021-06-10 23:56:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-10 23:56:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-06-10 23:56:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1094 transitions. [2021-06-10 23:56:36,357 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5331384015594542 [2021-06-10 23:56:36,357 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 1094 transitions. [2021-06-10 23:56:36,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 1094 transitions. [2021-06-10 23:56:36,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:56:36,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 1094 transitions. [2021-06-10 23:56:36,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 20.25925925925926) internal successors, (1094), 54 states have internal predecessors, (1094), 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 23:56:36,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 38.0) internal successors, (2090), 55 states have internal predecessors, (2090), 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 23:56:36,363 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 38.0) internal successors, (2090), 55 states have internal predecessors, (2090), 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 23:56:36,363 INFO L185 Difference]: Start difference. First operand has 73 places, 171 transitions, 1542 flow. Second operand 54 states and 1094 transitions. [2021-06-10 23:56:36,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 1260 transitions, 12969 flow [2021-06-10 23:57:51,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 1260 transitions, 12961 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-06-10 23:57:51,915 INFO L241 Difference]: Finished difference. Result has 156 places, 717 transitions, 8901 flow [2021-06-10 23:57:51,916 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=8901, PETRI_PLACES=156, PETRI_TRANSITIONS=717} [2021-06-10 23:57:51,916 INFO L343 CegarLoopForPetriNet]: 34 programPoint places, 122 predicate places. [2021-06-10 23:57:51,916 INFO L480 AbstractCegarLoop]: Abstraction has has 156 places, 717 transitions, 8901 flow [2021-06-10 23:57:51,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 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 23:57:51,916 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:51,916 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:57:52,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:57:52,135 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 23:57:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1983558270, now seen corresponding path program 2 times [2021-06-10 23:57:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:52,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651487614] [2021-06-10 23:57:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:57:52,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:52,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:57:52,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:57:52,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:57:52,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:57:52,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-06-10 23:57:52,174 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:57:52,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651487614] [2021-06-10 23:57:52,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231421427] [2021-06-10 23:57:52,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-10 23:57:52,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-10 23:57:52,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-10 23:57:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-10 23:57:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-10 23:57:52,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:57:52,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:57:52,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:57:52,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:57:52,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:57:52,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:57:52,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,219 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:57:52,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:57:52,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:57:52,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,255 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:57:52,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:57:52,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:57:52,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,260 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:57:52,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:57:52,272 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:57:52,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:57:52,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-06-10 23:57:52,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:57:52,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:57:52,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,292 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-06-10 23:57:52,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-06-10 23:57:52,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-10 23:57:52,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-06-10 23:57:52,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:57:52,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-10 23:57:52,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-06-10 23:57:52,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140379241] [2021-06-10 23:57:52,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-10 23:57:52,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:57:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-10 23:57:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-10 23:57:52,330 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 38 [2021-06-10 23:57:52,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 717 transitions, 8901 flow. Second operand has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 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 23:57:52,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:57:52,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 38 [2021-06-10 23:57:52,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:59:17,828 INFO L129 PetriNetUnfolder]: 211103/316950 cut-off events. [2021-06-10 23:59:17,828 INFO L130 PetriNetUnfolder]: For 5113950/5113950 co-relation queries the response was YES. [2021-06-10 23:59:22,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2516542 conditions, 316950 events. 211103/316950 cut-off events. For 5113950/5113950 co-relation queries the response was YES. Maximal size of possible extension queue 17990. Compared 2962567 event pairs, 27311 based on Foata normal form. 2190/319140 useless extension candidates. Maximal degree in co-relation 2274560. Up to 108496 conditions per place. [2021-06-10 23:59:24,855 INFO L132 encePairwiseOnDemand]: 19/38 looper letters, 672 selfloop transitions, 1441 changer transitions 16/2129 dead transitions. [2021-06-10 23:59:24,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 2129 transitions, 30857 flow [2021-06-10 23:59:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-10 23:59:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-06-10 23:59:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 611 transitions. [2021-06-10 23:59:24,859 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5024671052631579 [2021-06-10 23:59:24,859 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 611 transitions. [2021-06-10 23:59:24,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 611 transitions. [2021-06-10 23:59:24,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:59:24,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 611 transitions. [2021-06-10 23:59:24,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 19.09375) internal successors, (611), 32 states have internal predecessors, (611), 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 23:59:24,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 38.0) internal successors, (1254), 33 states have internal predecessors, (1254), 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 23:59:24,863 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 38.0) internal successors, (1254), 33 states have internal predecessors, (1254), 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 23:59:24,863 INFO L185 Difference]: Start difference. First operand has 156 places, 717 transitions, 8901 flow. Second operand 32 states and 611 transitions. [2021-06-10 23:59:24,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 2129 transitions, 30857 flow Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown