./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:23:10,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:23:10,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:23:10,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:23:10,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:23:10,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:23:10,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:23:10,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:23:10,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:23:10,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:23:10,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:23:10,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:23:10,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:23:10,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:23:10,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:23:10,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:23:10,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:23:10,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:23:10,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:23:10,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:23:10,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:23:10,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:23:10,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:23:10,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:23:10,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:23:10,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:23:10,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:23:10,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:23:10,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:23:10,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:23:10,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:23:10,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:23:10,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:23:10,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:23:10,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:23:10,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:23:10,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:23:10,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:23:10,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:23:10,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:23:10,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:23:10,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:23:10,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:23:10,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:23:10,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:23:10,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:23:10,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:23:10,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:23:10,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:23:10,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:23:10,293 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:23:10,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:23:10,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:23:10,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:23:10,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:23:10,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:23:10,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:23:10,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:23:10,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:23:10,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:23:10,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:23:10,303 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:23:10,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:23:10,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:23:10,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:23:10,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:23:10,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:23:10,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:23:10,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:23:10,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:23:10,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:23:10,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:23:10,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:23:10,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:23:10,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:23:10,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:23:10,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2021-12-21 15:23:10,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:23:10,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:23:10,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:23:10,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:23:10,593 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:23:10,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2021-12-21 15:23:10,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0a0dcc6/d0327e2091174c45a821db6c44e4f747/FLAG2f1c4e14a [2021-12-21 15:23:11,075 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:23:11,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2021-12-21 15:23:11,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0a0dcc6/d0327e2091174c45a821db6c44e4f747/FLAG2f1c4e14a [2021-12-21 15:23:11,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c0a0dcc6/d0327e2091174c45a821db6c44e4f747 [2021-12-21 15:23:11,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:23:11,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:23:11,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:23:11,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:23:11,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:23:11,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@391d8f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11, skipping insertion in model container [2021-12-21 15:23:11,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:23:11,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:23:11,318 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2021-12-21 15:23:11,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:23:11,343 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:23:11,377 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2021-12-21 15:23:11,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:23:11,392 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:23:11,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11 WrapperNode [2021-12-21 15:23:11,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:23:11,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:23:11,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:23:11,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:23:11,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,449 INFO L137 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 166 [2021-12-21 15:23:11,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:23:11,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:23:11,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:23:11,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:23:11,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:23:11,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:23:11,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:23:11,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:23:11,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (1/1) ... [2021-12-21 15:23:11,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:23:11,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:11,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:23:11,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:23:11,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:23:11,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:23:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:23:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:23:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:23:11,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:23:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:23:11,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:23:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:23:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:23:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:23:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:23:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:23:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:23:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:23:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:23:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:23:11,608 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:23:11,723 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:23:11,725 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:23:12,029 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:23:12,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:23:12,097 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 15:23:12,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:23:12 BoogieIcfgContainer [2021-12-21 15:23:12,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:23:12,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:23:12,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:23:12,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:23:12,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:23:11" (1/3) ... [2021-12-21 15:23:12,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7628baa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:23:12, skipping insertion in model container [2021-12-21 15:23:12,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:23:11" (2/3) ... [2021-12-21 15:23:12,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7628baa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:23:12, skipping insertion in model container [2021-12-21 15:23:12,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:23:12" (3/3) ... [2021-12-21 15:23:12,107 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2021-12-21 15:23:12,112 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:23:12,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:23:12,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:23:12,112 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:23:12,147 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,148 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,148 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,148 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,149 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,149 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,149 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,149 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,150 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,155 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,155 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,155 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,155 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,157 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,157 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,161 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,161 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,161 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,162 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,162 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,162 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,162 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,162 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,163 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,163 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,163 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,164 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,164 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,165 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,165 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,165 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,168 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,168 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,169 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,169 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,169 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,172 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,172 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,172 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,172 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,172 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,173 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,173 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,173 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:23:12,178 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-21 15:23:12,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:23:12,224 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:23:12,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-21 15:23:12,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 156 transitions, 336 flow [2021-12-21 15:23:12,364 INFO L129 PetriNetUnfolder]: 11/153 cut-off events. [2021-12-21 15:23:12,365 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:23:12,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 11/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2021-12-21 15:23:12,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 156 transitions, 336 flow [2021-12-21 15:23:12,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 142 transitions, 302 flow [2021-12-21 15:23:12,428 INFO L129 PetriNetUnfolder]: 11/141 cut-off events. [2021-12-21 15:23:12,431 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:23:12,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:12,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:12,433 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1502345378, now seen corresponding path program 1 times [2021-12-21 15:23:12,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429704330] [2021-12-21 15:23:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:12,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:12,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:12,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429704330] [2021-12-21 15:23:12,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429704330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:12,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:12,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:23:12,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91628948] [2021-12-21 15:23:12,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:12,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:23:12,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:23:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:23:12,790 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 156 [2021-12-21 15:23:12,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 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) [2021-12-21 15:23:12,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:12,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 156 [2021-12-21 15:23:12,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:12,866 INFO L129 PetriNetUnfolder]: 24/206 cut-off events. [2021-12-21 15:23:12,866 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-12-21 15:23:12,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 206 events. 24/206 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 370 event pairs, 7 based on Foata normal form. 22/206 useless extension candidates. Maximal degree in co-relation 154. Up to 32 conditions per place. [2021-12-21 15:23:12,871 INFO L132 encePairwiseOnDemand]: 149/156 looper letters, 8 selfloop transitions, 0 changer transitions 4/135 dead transitions. [2021-12-21 15:23:12,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 135 transitions, 304 flow [2021-12-21 15:23:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:23:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:23:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 295 transitions. [2021-12-21 15:23:12,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9455128205128205 [2021-12-21 15:23:12,889 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 295 transitions. [2021-12-21 15:23:12,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 295 transitions. [2021-12-21 15:23:12,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:12,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 295 transitions. [2021-12-21 15:23:12,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 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) [2021-12-21 15:23:12,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2021-12-21 15:23:12,905 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2021-12-21 15:23:12,906 INFO L186 Difference]: Start difference. First operand has 141 places, 142 transitions, 302 flow. Second operand 2 states and 295 transitions. [2021-12-21 15:23:12,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 135 transitions, 304 flow [2021-12-21 15:23:12,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-21 15:23:12,915 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2021-12-21 15:23:12,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2021-12-21 15:23:12,925 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2021-12-21 15:23:12,926 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2021-12-21 15:23:12,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 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) [2021-12-21 15:23:12,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:12,927 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:12,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:23:12,928 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1179471207, now seen corresponding path program 1 times [2021-12-21 15:23:12,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:12,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507284447] [2021-12-21 15:23:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:12,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:13,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:13,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507284447] [2021-12-21 15:23:13,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507284447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:13,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:13,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:23:13,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114134057] [2021-12-21 15:23:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:13,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:23:13,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:23:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:23:13,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 156 [2021-12-21 15:23:13,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2021-12-21 15:23:13,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:13,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 156 [2021-12-21 15:23:13,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:13,264 INFO L129 PetriNetUnfolder]: 108/360 cut-off events. [2021-12-21 15:23:13,265 INFO L130 PetriNetUnfolder]: For 26/27 co-relation queries the response was YES. [2021-12-21 15:23:13,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 360 events. 108/360 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1321 event pairs, 16 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 547. Up to 61 conditions per place. [2021-12-21 15:23:13,269 INFO L132 encePairwiseOnDemand]: 151/156 looper letters, 30 selfloop transitions, 5 changer transitions 0/149 dead transitions. [2021-12-21 15:23:13,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 149 transitions, 378 flow [2021-12-21 15:23:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:23:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:23:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 692 transitions. [2021-12-21 15:23:13,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8871794871794871 [2021-12-21 15:23:13,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 692 transitions. [2021-12-21 15:23:13,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 692 transitions. [2021-12-21 15:23:13,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:13,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 692 transitions. [2021-12-21 15:23:13,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 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) [2021-12-21 15:23:13,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 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) [2021-12-21 15:23:13,284 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 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) [2021-12-21 15:23:13,284 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 5 states and 692 transitions. [2021-12-21 15:23:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 149 transitions, 378 flow [2021-12-21 15:23:13,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 149 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:23:13,292 INFO L242 Difference]: Finished difference. Result has 139 places, 134 transitions, 299 flow [2021-12-21 15:23:13,293 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2021-12-21 15:23:13,294 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, -2 predicate places. [2021-12-21 15:23:13,294 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 299 flow [2021-12-21 15:23:13,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2021-12-21 15:23:13,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:13,295 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:13,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:23:13,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:13,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1830553999, now seen corresponding path program 2 times [2021-12-21 15:23:13,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:13,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595747123] [2021-12-21 15:23:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:13,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:13,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595747123] [2021-12-21 15:23:13,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595747123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:13,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:13,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 15:23:13,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678086557] [2021-12-21 15:23:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:13,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:23:13,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:23:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:23:13,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 156 [2021-12-21 15:23:13,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 299 flow. Second operand has 9 states, 9 states have (on average 110.44444444444444) internal successors, (994), 9 states have internal predecessors, (994), 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) [2021-12-21 15:23:13,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:13,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 156 [2021-12-21 15:23:13,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:13,889 INFO L129 PetriNetUnfolder]: 223/618 cut-off events. [2021-12-21 15:23:13,889 INFO L130 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2021-12-21 15:23:13,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 618 events. 223/618 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3311 event pairs, 20 based on Foata normal form. 10/607 useless extension candidates. Maximal degree in co-relation 1228. Up to 144 conditions per place. [2021-12-21 15:23:13,895 INFO L132 encePairwiseOnDemand]: 145/156 looper letters, 52 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2021-12-21 15:23:13,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 157 transitions, 485 flow [2021-12-21 15:23:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:23:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:23:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2021-12-21 15:23:13,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7256410256410256 [2021-12-21 15:23:13,899 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2021-12-21 15:23:13,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2021-12-21 15:23:13,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:13,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2021-12-21 15:23:13,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.2) internal successors, (1132), 10 states have internal predecessors, (1132), 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) [2021-12-21 15:23:13,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2021-12-21 15:23:13,908 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2021-12-21 15:23:13,908 INFO L186 Difference]: Start difference. First operand has 139 places, 134 transitions, 299 flow. Second operand 10 states and 1132 transitions. [2021-12-21 15:23:13,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 157 transitions, 485 flow [2021-12-21 15:23:13,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 157 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:23:13,916 INFO L242 Difference]: Finished difference. Result has 149 places, 136 transitions, 339 flow [2021-12-21 15:23:13,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=149, PETRI_TRANSITIONS=136} [2021-12-21 15:23:13,918 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 8 predicate places. [2021-12-21 15:23:13,918 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 136 transitions, 339 flow [2021-12-21 15:23:13,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.44444444444444) internal successors, (994), 9 states have internal predecessors, (994), 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) [2021-12-21 15:23:13,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:13,919 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:13,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:23:13,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash -334250164, now seen corresponding path program 1 times [2021-12-21 15:23:13,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:13,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730091399] [2021-12-21 15:23:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:13,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:13,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730091399] [2021-12-21 15:23:13,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730091399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:13,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:13,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:23:13,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313702382] [2021-12-21 15:23:13,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:13,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:23:13,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:13,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:23:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:23:13,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 156 [2021-12-21 15:23:13,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 136 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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) [2021-12-21 15:23:13,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:13,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 156 [2021-12-21 15:23:13,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:14,037 INFO L129 PetriNetUnfolder]: 33/243 cut-off events. [2021-12-21 15:23:14,037 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2021-12-21 15:23:14,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 243 events. 33/243 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 571 event pairs, 5 based on Foata normal form. 4/229 useless extension candidates. Maximal degree in co-relation 368. Up to 41 conditions per place. [2021-12-21 15:23:14,039 INFO L132 encePairwiseOnDemand]: 153/156 looper letters, 13 selfloop transitions, 2 changer transitions 1/140 dead transitions. [2021-12-21 15:23:14,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 140 transitions, 382 flow [2021-12-21 15:23:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:23:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:23:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2021-12-21 15:23:14,041 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9081196581196581 [2021-12-21 15:23:14,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2021-12-21 15:23:14,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2021-12-21 15:23:14,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:14,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2021-12-21 15:23:14,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2021-12-21 15:23:14,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2021-12-21 15:23:14,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2021-12-21 15:23:14,045 INFO L186 Difference]: Start difference. First operand has 149 places, 136 transitions, 339 flow. Second operand 3 states and 425 transitions. [2021-12-21 15:23:14,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 140 transitions, 382 flow [2021-12-21 15:23:14,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 140 transitions, 365 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-12-21 15:23:14,048 INFO L242 Difference]: Finished difference. Result has 145 places, 137 transitions, 334 flow [2021-12-21 15:23:14,049 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2021-12-21 15:23:14,049 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 4 predicate places. [2021-12-21 15:23:14,050 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 334 flow [2021-12-21 15:23:14,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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) [2021-12-21 15:23:14,050 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:14,050 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:14,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:23:14,051 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1349938213, now seen corresponding path program 1 times [2021-12-21 15:23:14,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:14,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84476670] [2021-12-21 15:23:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:14,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:14,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:14,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84476670] [2021-12-21 15:23:14,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84476670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:23:14,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:23:14,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:23:14,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653292485] [2021-12-21 15:23:14,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:23:14,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:23:14,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:23:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:23:14,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 156 [2021-12-21 15:23:14,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-12-21 15:23:14,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:14,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 156 [2021-12-21 15:23:14,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:14,259 INFO L129 PetriNetUnfolder]: 34/302 cut-off events. [2021-12-21 15:23:14,259 INFO L130 PetriNetUnfolder]: For 71/79 co-relation queries the response was YES. [2021-12-21 15:23:14,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 302 events. 34/302 cut-off events. For 71/79 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 801 event pairs, 9 based on Foata normal form. 3/282 useless extension candidates. Maximal degree in co-relation 476. Up to 51 conditions per place. [2021-12-21 15:23:14,262 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 21 selfloop transitions, 6 changer transitions 5/146 dead transitions. [2021-12-21 15:23:14,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 146 transitions, 420 flow [2021-12-21 15:23:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:23:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:23:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 914 transitions. [2021-12-21 15:23:14,270 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.836996336996337 [2021-12-21 15:23:14,270 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 914 transitions. [2021-12-21 15:23:14,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 914 transitions. [2021-12-21 15:23:14,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:14,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 914 transitions. [2021-12-21 15:23:14,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.57142857142858) internal successors, (914), 7 states have internal predecessors, (914), 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) [2021-12-21 15:23:14,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 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) [2021-12-21 15:23:14,283 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 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) [2021-12-21 15:23:14,283 INFO L186 Difference]: Start difference. First operand has 145 places, 137 transitions, 334 flow. Second operand 7 states and 914 transitions. [2021-12-21 15:23:14,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 146 transitions, 420 flow [2021-12-21 15:23:14,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 146 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:23:14,289 INFO L242 Difference]: Finished difference. Result has 152 places, 138 transitions, 354 flow [2021-12-21 15:23:14,289 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=354, PETRI_PLACES=152, PETRI_TRANSITIONS=138} [2021-12-21 15:23:14,291 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2021-12-21 15:23:14,292 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 138 transitions, 354 flow [2021-12-21 15:23:14,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-12-21 15:23:14,293 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:14,293 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:14,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:23:14,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash 530472597, now seen corresponding path program 1 times [2021-12-21 15:23:14,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:14,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785607788] [2021-12-21 15:23:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:14,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:15,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:15,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785607788] [2021-12-21 15:23:15,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785607788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:15,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200294994] [2021-12-21 15:23:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:15,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:15,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:15,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:23:15,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:23:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 15:23:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:16,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 15:23:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:16,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:17,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:17,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-12-21 15:23:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:18,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200294994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:18,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:18,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 20] total 60 [2021-12-21 15:23:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208371019] [2021-12-21 15:23:18,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-21 15:23:18,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-21 15:23:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=3036, Unknown=0, NotChecked=0, Total=3540 [2021-12-21 15:23:18,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 156 [2021-12-21 15:23:18,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 138 transitions, 354 flow. Second operand has 60 states, 60 states have (on average 86.73333333333333) internal successors, (5204), 60 states have internal predecessors, (5204), 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) [2021-12-21 15:23:18,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:18,994 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 156 [2021-12-21 15:23:18,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:30,071 INFO L129 PetriNetUnfolder]: 7997/16882 cut-off events. [2021-12-21 15:23:30,072 INFO L130 PetriNetUnfolder]: For 9922/9922 co-relation queries the response was YES. [2021-12-21 15:23:30,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38392 conditions, 16882 events. 7997/16882 cut-off events. For 9922/9922 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 164161 event pairs, 757 based on Foata normal form. 54/15982 useless extension candidates. Maximal degree in co-relation 38380. Up to 1583 conditions per place. [2021-12-21 15:23:30,179 INFO L132 encePairwiseOnDemand]: 120/156 looper letters, 526 selfloop transitions, 166 changer transitions 647/1406 dead transitions. [2021-12-21 15:23:30,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 1406 transitions, 6762 flow [2021-12-21 15:23:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-12-21 15:23:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-12-21 15:23:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 14336 transitions. [2021-12-21 15:23:30,206 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5928866832092639 [2021-12-21 15:23:30,206 INFO L72 ComplementDD]: Start complementDD. Operand 155 states and 14336 transitions. [2021-12-21 15:23:30,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 155 states and 14336 transitions. [2021-12-21 15:23:30,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:23:30,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 155 states and 14336 transitions. [2021-12-21 15:23:30,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 156 states, 155 states have (on average 92.49032258064516) internal successors, (14336), 155 states have internal predecessors, (14336), 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) [2021-12-21 15:23:30,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 156 states, 156 states have (on average 156.0) internal successors, (24336), 156 states have internal predecessors, (24336), 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) [2021-12-21 15:23:30,344 INFO L81 ComplementDD]: Finished complementDD. Result has 156 states, 156 states have (on average 156.0) internal successors, (24336), 156 states have internal predecessors, (24336), 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) [2021-12-21 15:23:30,344 INFO L186 Difference]: Start difference. First operand has 152 places, 138 transitions, 354 flow. Second operand 155 states and 14336 transitions. [2021-12-21 15:23:30,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 1406 transitions, 6762 flow [2021-12-21 15:23:30,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1406 transitions, 6722 flow, removed 15 selfloop flow, removed 5 redundant places. [2021-12-21 15:23:30,409 INFO L242 Difference]: Finished difference. Result has 389 places, 284 transitions, 1706 flow [2021-12-21 15:23:30,410 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=155, PETRI_FLOW=1706, PETRI_PLACES=389, PETRI_TRANSITIONS=284} [2021-12-21 15:23:30,413 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 248 predicate places. [2021-12-21 15:23:30,413 INFO L470 AbstractCegarLoop]: Abstraction has has 389 places, 284 transitions, 1706 flow [2021-12-21 15:23:30,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 86.73333333333333) internal successors, (5204), 60 states have internal predecessors, (5204), 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) [2021-12-21 15:23:30,419 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:23:30,419 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:23:30,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:23:30,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 15:23:30,643 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:23:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:23:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2060040751, now seen corresponding path program 2 times [2021-12-21 15:23:30,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:23:30,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844700965] [2021-12-21 15:23:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:23:30,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:23:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:23:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:31,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:23:31,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844700965] [2021-12-21 15:23:31,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844700965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:23:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981654545] [2021-12-21 15:23:31,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:23:31,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:23:31,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:23:31,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:23:31,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:23:31,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:23:31,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:23:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-21 15:23:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:23:32,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 15:23:33,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:23:33,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:23:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:23:33,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 15:23:33,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-21 15:23:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:23:33,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:23:34,177 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_139 (Array Int Int))) (<= (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_139) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) c_~W~0)) is different from false [2021-12-21 15:23:35,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:35,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2021-12-21 15:23:35,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:35,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 824 treesize of output 792 [2021-12-21 15:23:35,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:35,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 776 treesize of output 720 [2021-12-21 15:23:35,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 590 treesize of output 494 [2021-12-21 15:23:35,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:23:35,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 608 treesize of output 588 [2021-12-21 15:23:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-21 15:23:37,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981654545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:23:37,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:23:37,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31, 30] total 78 [2021-12-21 15:23:37,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911754278] [2021-12-21 15:23:37,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:23:37,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-21 15:23:37,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:23:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-21 15:23:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=5379, Unknown=29, NotChecked=150, Total=6006 [2021-12-21 15:23:37,598 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 156 [2021-12-21 15:23:37,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 284 transitions, 1706 flow. Second operand has 78 states, 78 states have (on average 71.37179487179488) internal successors, (5567), 78 states have internal predecessors, (5567), 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) [2021-12-21 15:23:37,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:23:37,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 156 [2021-12-21 15:23:37,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:23:50,688 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_139 (Array Int Int))) (<= (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_139) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) c_~W~0)) (not (<= (mod |c_thread2Thread1of1ForFork2_~cond~1#1| 256) 0))) is different from false [2021-12-21 15:24:00,210 INFO L129 PetriNetUnfolder]: 14736/29069 cut-off events. [2021-12-21 15:24:00,210 INFO L130 PetriNetUnfolder]: For 1024724/1024830 co-relation queries the response was YES. [2021-12-21 15:24:00,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191224 conditions, 29069 events. 14736/29069 cut-off events. For 1024724/1024830 co-relation queries the response was YES. Maximal size of possible extension queue 1340. Compared 285040 event pairs, 1536 based on Foata normal form. 207/28164 useless extension candidates. Maximal degree in co-relation 191125. Up to 3455 conditions per place. [2021-12-21 15:24:00,666 INFO L132 encePairwiseOnDemand]: 108/156 looper letters, 856 selfloop transitions, 312 changer transitions 362/1588 dead transitions. [2021-12-21 15:24:00,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1588 transitions, 18235 flow [2021-12-21 15:24:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-12-21 15:24:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-12-21 15:24:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 9616 transitions. [2021-12-21 15:24:00,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.505254308532997 [2021-12-21 15:24:00,686 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 9616 transitions. [2021-12-21 15:24:00,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 9616 transitions. [2021-12-21 15:24:00,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:24:00,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 9616 transitions. [2021-12-21 15:24:00,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 78.81967213114754) internal successors, (9616), 122 states have internal predecessors, (9616), 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) [2021-12-21 15:24:00,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 156.0) internal successors, (19188), 123 states have internal predecessors, (19188), 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) [2021-12-21 15:24:00,738 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 156.0) internal successors, (19188), 123 states have internal predecessors, (19188), 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) [2021-12-21 15:24:00,738 INFO L186 Difference]: Start difference. First operand has 389 places, 284 transitions, 1706 flow. Second operand 122 states and 9616 transitions. [2021-12-21 15:24:00,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1588 transitions, 18235 flow [2021-12-21 15:24:02,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1588 transitions, 13704 flow, removed 2122 selfloop flow, removed 55 redundant places. [2021-12-21 15:24:02,608 INFO L242 Difference]: Finished difference. Result has 441 places, 501 transitions, 4951 flow [2021-12-21 15:24:02,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=4951, PETRI_PLACES=441, PETRI_TRANSITIONS=501} [2021-12-21 15:24:02,609 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 300 predicate places. [2021-12-21 15:24:02,609 INFO L470 AbstractCegarLoop]: Abstraction has has 441 places, 501 transitions, 4951 flow [2021-12-21 15:24:02,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 71.37179487179488) internal successors, (5567), 78 states have internal predecessors, (5567), 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) [2021-12-21 15:24:02,611 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:24:02,611 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:24:02,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:24:02,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 15:24:02,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:24:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:24:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash -618402877, now seen corresponding path program 3 times [2021-12-21 15:24:02,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:24:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014630248] [2021-12-21 15:24:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:24:02,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:24:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:24:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:24:04,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:24:04,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014630248] [2021-12-21 15:24:04,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014630248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:24:04,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104422011] [2021-12-21 15:24:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:24:04,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:24:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:24:04,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:24:04,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:24:04,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:24:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:24:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-21 15:24:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates...