./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:03:36,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:03:36,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:03:36,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:03:36,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:03:36,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:03:36,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:03:36,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:03:36,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:03:36,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:03:36,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:03:36,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:03:36,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:03:36,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:03:36,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:03:36,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:03:36,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:03:36,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:03:36,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:03:36,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:03:36,261 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:03:36,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:03:36,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:03:36,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:03:36,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:03:36,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:03:36,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:03:36,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:03:36,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:03:36,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:03:36,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:03:36,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:03:36,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:03:36,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:03:36,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:03:36,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:03:36,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:03:36,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:03:36,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:03:36,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:03:36,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:03:36,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:03:36,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:03:36,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:03:36,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:03:36,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:03:36,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:03:36,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:03:36,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:03:36,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:03:36,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:03:36,317 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:03:36,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:03:36,318 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:03:36,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:03:36,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:03:36,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:03:36,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:03:36,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:03:36,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:03:36,319 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:03:36,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:03:36,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:03:36,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:03:36,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:03:36,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:03:36,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:03:36,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:03:36,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:03:36,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:03:36,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:03:36,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:03:36,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:03:36,321 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:03:36,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:03:36,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:03:36,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-07-21 09:03:36,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:03:36,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:03:36,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:03:36,639 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:03:36,640 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:03:36,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-07-21 09:03:36,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01816ea1/3386a0c6643c4c57b1372a06dafd68d1/FLAGd83b17b96 [2022-07-21 09:03:37,089 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:03:37,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-07-21 09:03:37,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01816ea1/3386a0c6643c4c57b1372a06dafd68d1/FLAGd83b17b96 [2022-07-21 09:03:37,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01816ea1/3386a0c6643c4c57b1372a06dafd68d1 [2022-07-21 09:03:37,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:03:37,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:03:37,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:03:37,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:03:37,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:03:37,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9922020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37, skipping insertion in model container [2022-07-21 09:03:37,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:03:37,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:03:37,312 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-bad-counter-queue2.wvr.c[2271,2284] [2022-07-21 09:03:37,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:03:37,338 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:03:37,366 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-bad-counter-queue2.wvr.c[2271,2284] [2022-07-21 09:03:37,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:03:37,383 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:03:37,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37 WrapperNode [2022-07-21 09:03:37,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:03:37,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:03:37,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:03:37,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:03:37,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,429 INFO L137 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2022-07-21 09:03:37,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:03:37,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:03:37,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:03:37,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:03:37,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:03:37,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:03:37,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:03:37,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:03:37,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (1/1) ... [2022-07-21 09:03:37,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:03:37,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:37,503 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) [2022-07-21 09:03:37,505 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 [2022-07-21 09:03:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:03:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:03:37,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:03:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:03:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:03:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:03:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:03:37,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:03:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:03:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:03:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:03:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:03:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:03:37,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:03:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:03:37,534 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:03:37,615 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:03:37,616 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:03:37,839 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:03:37,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:03:37,937 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:03:37,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:03:37 BoogieIcfgContainer [2022-07-21 09:03:37,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:03:37,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:03:37,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:03:37,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:03:37,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:03:37" (1/3) ... [2022-07-21 09:03:37,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c446ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:03:37, skipping insertion in model container [2022-07-21 09:03:37,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:03:37" (2/3) ... [2022-07-21 09:03:37,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c446ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:03:37, skipping insertion in model container [2022-07-21 09:03:37,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:03:37" (3/3) ... [2022-07-21 09:03:37,945 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-07-21 09:03:37,949 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:03:37,955 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:03:37,956 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:03:37,956 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:03:38,019 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:03:38,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2022-07-21 09:03:38,097 INFO L129 PetriNetUnfolder]: 9/115 cut-off events. [2022-07-21 09:03:38,099 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:03:38,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-07-21 09:03:38,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2022-07-21 09:03:38,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2022-07-21 09:03:38,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:03:38,121 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ca3db45, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a50eb69 [2022-07-21 09:03:38,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:03:38,140 INFO L129 PetriNetUnfolder]: 9/105 cut-off events. [2022-07-21 09:03:38,140 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:03:38,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:38,141 INFO L200 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] [2022-07-21 09:03:38,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1997616241, now seen corresponding path program 1 times [2022-07-21 09:03:38,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:38,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95378840] [2022-07-21 09:03:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:38,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:38,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95378840] [2022-07-21 09:03:38,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95378840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:38,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:38,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:03:38,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889999471] [2022-07-21 09:03:38,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:03:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:03:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:03:38,358 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 117 [2022-07-21 09:03:38,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 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) [2022-07-21 09:03:38,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:38,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 117 [2022-07-21 09:03:38,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:38,422 INFO L129 PetriNetUnfolder]: 12/133 cut-off events. [2022-07-21 09:03:38,422 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-21 09:03:38,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 133 events. 12/133 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 170 event pairs, 3 based on Foata normal form. 13/135 useless extension candidates. Maximal degree in co-relation 78. Up to 19 conditions per place. [2022-07-21 09:03:38,425 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 6 selfloop transitions, 0 changer transitions 3/100 dead transitions. [2022-07-21 09:03:38,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 224 flow [2022-07-21 09:03:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:03:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:03:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2022-07-21 09:03:38,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9401709401709402 [2022-07-21 09:03:38,436 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2022-07-21 09:03:38,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2022-07-21 09:03:38,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:38,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2022-07-21 09:03:38,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 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) [2022-07-21 09:03:38,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2022-07-21 09:03:38,448 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2022-07-21 09:03:38,450 INFO L186 Difference]: Start difference. First operand has 104 places, 106 transitions, 224 flow. Second operand 2 states and 220 transitions. [2022-07-21 09:03:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 224 flow [2022-07-21 09:03:38,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:03:38,457 INFO L242 Difference]: Finished difference. Result has 101 places, 97 transitions, 198 flow [2022-07-21 09:03:38,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2022-07-21 09:03:38,464 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2022-07-21 09:03:38,464 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 198 flow [2022-07-21 09:03:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 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) [2022-07-21 09:03:38,465 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:38,465 INFO L200 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] [2022-07-21 09:03:38,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:03:38,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1204015377, now seen corresponding path program 1 times [2022-07-21 09:03:38,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:38,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753761222] [2022-07-21 09:03:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:38,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753761222] [2022-07-21 09:03:38,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753761222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:38,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:38,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:03:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801169097] [2022-07-21 09:03:38,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:38,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:03:38,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:03:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:03:38,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2022-07-21 09:03:38,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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) [2022-07-21 09:03:38,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:38,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2022-07-21 09:03:38,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:38,776 INFO L129 PetriNetUnfolder]: 13/150 cut-off events. [2022-07-21 09:03:38,776 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-07-21 09:03:38,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 150 events. 13/150 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 252 event pairs, 0 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 192. Up to 24 conditions per place. [2022-07-21 09:03:38,778 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 20 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2022-07-21 09:03:38,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 105 transitions, 271 flow [2022-07-21 09:03:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:03:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:03:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2022-07-21 09:03:38,784 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-07-21 09:03:38,784 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2022-07-21 09:03:38,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2022-07-21 09:03:38,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:38,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2022-07-21 09:03:38,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 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) [2022-07-21 09:03:38,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 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) [2022-07-21 09:03:38,790 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 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) [2022-07-21 09:03:38,790 INFO L186 Difference]: Start difference. First operand has 101 places, 97 transitions, 198 flow. Second operand 5 states and 468 transitions. [2022-07-21 09:03:38,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 105 transitions, 271 flow [2022-07-21 09:03:38,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:03:38,794 INFO L242 Difference]: Finished difference. Result has 105 places, 99 transitions, 221 flow [2022-07-21 09:03:38,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2022-07-21 09:03:38,796 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-07-21 09:03:38,796 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 221 flow [2022-07-21 09:03:38,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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) [2022-07-21 09:03:38,797 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:38,797 INFO L200 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] [2022-07-21 09:03:38,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:03:38,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1430434687, now seen corresponding path program 1 times [2022-07-21 09:03:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:38,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063902019] [2022-07-21 09:03:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:38,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:38,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:38,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063902019] [2022-07-21 09:03:38,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063902019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:38,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:38,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:03:38,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512972111] [2022-07-21 09:03:38,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:38,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:03:38,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:38,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:03:38,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:03:38,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-21 09:03:38,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 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) [2022-07-21 09:03:38,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:38,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-21 09:03:38,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:39,071 INFO L129 PetriNetUnfolder]: 83/368 cut-off events. [2022-07-21 09:03:39,071 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-21 09:03:39,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 368 events. 83/368 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1527 event pairs, 34 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 615. Up to 125 conditions per place. [2022-07-21 09:03:39,075 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 41 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-07-21 09:03:39,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 374 flow [2022-07-21 09:03:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:03:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:03:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2022-07-21 09:03:39,078 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7585470085470085 [2022-07-21 09:03:39,078 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2022-07-21 09:03:39,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2022-07-21 09:03:39,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:39,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2022-07-21 09:03:39,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 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) [2022-07-21 09:03:39,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 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) [2022-07-21 09:03:39,083 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 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) [2022-07-21 09:03:39,083 INFO L186 Difference]: Start difference. First operand has 105 places, 99 transitions, 221 flow. Second operand 8 states and 710 transitions. [2022-07-21 09:03:39,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 374 flow [2022-07-21 09:03:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 119 transitions, 365 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 09:03:39,088 INFO L242 Difference]: Finished difference. Result has 110 places, 102 transitions, 250 flow [2022-07-21 09:03:39,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2022-07-21 09:03:39,090 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2022-07-21 09:03:39,090 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 250 flow [2022-07-21 09:03:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 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) [2022-07-21 09:03:39,091 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:39,091 INFO L200 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] [2022-07-21 09:03:39,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:03:39,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -852119249, now seen corresponding path program 1 times [2022-07-21 09:03:39,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617423794] [2022-07-21 09:03:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:39,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:39,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:39,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617423794] [2022-07-21 09:03:39,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617423794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:03:39,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:03:39,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:03:39,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537507090] [2022-07-21 09:03:39,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:39,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:03:39,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:03:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:03:39,183 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-21 09:03:39,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 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) [2022-07-21 09:03:39,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:39,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-21 09:03:39,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:39,292 INFO L129 PetriNetUnfolder]: 67/286 cut-off events. [2022-07-21 09:03:39,292 INFO L130 PetriNetUnfolder]: For 51/54 co-relation queries the response was YES. [2022-07-21 09:03:39,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 286 events. 67/286 cut-off events. For 51/54 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1018 event pairs, 36 based on Foata normal form. 3/268 useless extension candidates. Maximal degree in co-relation 502. Up to 124 conditions per place. [2022-07-21 09:03:39,294 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 27 selfloop transitions, 6 changer transitions 11/114 dead transitions. [2022-07-21 09:03:39,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 365 flow [2022-07-21 09:03:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:03:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:03:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2022-07-21 09:03:39,296 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7542735042735043 [2022-07-21 09:03:39,296 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2022-07-21 09:03:39,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2022-07-21 09:03:39,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:39,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2022-07-21 09:03:39,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 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) [2022-07-21 09:03:39,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 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) [2022-07-21 09:03:39,300 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 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) [2022-07-21 09:03:39,300 INFO L186 Difference]: Start difference. First operand has 110 places, 102 transitions, 250 flow. Second operand 8 states and 706 transitions. [2022-07-21 09:03:39,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 365 flow [2022-07-21 09:03:39,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:03:39,303 INFO L242 Difference]: Finished difference. Result has 115 places, 100 transitions, 244 flow [2022-07-21 09:03:39,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2022-07-21 09:03:39,304 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-07-21 09:03:39,304 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 244 flow [2022-07-21 09:03:39,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 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) [2022-07-21 09:03:39,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:39,304 INFO L200 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] [2022-07-21 09:03:39,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:03:39,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1474470436, now seen corresponding path program 1 times [2022-07-21 09:03:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:39,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925065141] [2022-07-21 09:03:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:39,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:39,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925065141] [2022-07-21 09:03:39,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925065141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676131732] [2022-07-21 09:03:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:39,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:39,371 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) [2022-07-21 09:03:39,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:03:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:03:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:39,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:39,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676131732] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:39,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:03:39,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:03:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118512059] [2022-07-21 09:03:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:03:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:03:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:03:39,695 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-21 09:03:39,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2022-07-21 09:03:39,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:39,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-21 09:03:39,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:39,771 INFO L129 PetriNetUnfolder]: 58/226 cut-off events. [2022-07-21 09:03:39,771 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-07-21 09:03:39,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 226 events. 58/226 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 641 event pairs, 13 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 432. Up to 65 conditions per place. [2022-07-21 09:03:39,773 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 30 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2022-07-21 09:03:39,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 107 transitions, 341 flow [2022-07-21 09:03:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:03:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:03:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-21 09:03:39,774 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-07-21 09:03:39,775 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-21 09:03:39,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-21 09:03:39,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:39,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-21 09:03:39,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 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) [2022-07-21 09:03:39,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 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) [2022-07-21 09:03:39,778 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 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) [2022-07-21 09:03:39,778 INFO L186 Difference]: Start difference. First operand has 115 places, 100 transitions, 244 flow. Second operand 7 states and 615 transitions. [2022-07-21 09:03:39,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 107 transitions, 341 flow [2022-07-21 09:03:39,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 315 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-21 09:03:39,780 INFO L242 Difference]: Finished difference. Result has 111 places, 102 transitions, 255 flow [2022-07-21 09:03:39,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2022-07-21 09:03:39,781 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2022-07-21 09:03:39,781 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 255 flow [2022-07-21 09:03:39,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2022-07-21 09:03:39,782 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:39,782 INFO L200 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] [2022-07-21 09:03:39,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:03:39,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:40,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1354192604, now seen corresponding path program 1 times [2022-07-21 09:03:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:40,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145547578] [2022-07-21 09:03:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:40,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:40,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145547578] [2022-07-21 09:03:40,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145547578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:40,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303383604] [2022-07-21 09:03:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:40,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:40,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:40,088 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) [2022-07-21 09:03:40,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:03:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:03:40,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:40,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:40,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303383604] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:40,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:03:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-21 09:03:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30484417] [2022-07-21 09:03:40,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:03:40,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:03:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:03:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:03:40,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-21 09:03:40,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2022-07-21 09:03:40,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:40,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-21 09:03:40,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:40,403 INFO L129 PetriNetUnfolder]: 46/209 cut-off events. [2022-07-21 09:03:40,403 INFO L130 PetriNetUnfolder]: For 65/80 co-relation queries the response was YES. [2022-07-21 09:03:40,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 209 events. 46/209 cut-off events. For 65/80 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 523 event pairs, 9 based on Foata normal form. 15/211 useless extension candidates. Maximal degree in co-relation 397. Up to 54 conditions per place. [2022-07-21 09:03:40,405 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 32 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2022-07-21 09:03:40,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 360 flow [2022-07-21 09:03:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:03:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:03:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-21 09:03:40,406 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-07-21 09:03:40,407 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-21 09:03:40,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-21 09:03:40,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:40,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-21 09:03:40,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 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) [2022-07-21 09:03:40,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 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) [2022-07-21 09:03:40,410 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 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) [2022-07-21 09:03:40,410 INFO L186 Difference]: Start difference. First operand has 111 places, 102 transitions, 255 flow. Second operand 7 states and 615 transitions. [2022-07-21 09:03:40,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 360 flow [2022-07-21 09:03:40,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:03:40,412 INFO L242 Difference]: Finished difference. Result has 115 places, 103 transitions, 274 flow [2022-07-21 09:03:40,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2022-07-21 09:03:40,413 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-07-21 09:03:40,413 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 274 flow [2022-07-21 09:03:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2022-07-21 09:03:40,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:40,414 INFO L200 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] [2022-07-21 09:03:40,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:40,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 09:03:40,628 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:40,628 INFO L85 PathProgramCache]: Analyzing trace with hash 62640818, now seen corresponding path program 1 times [2022-07-21 09:03:40,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:40,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868036294] [2022-07-21 09:03:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:40,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:40,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868036294] [2022-07-21 09:03:40,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868036294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:40,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153393890] [2022-07-21 09:03:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:40,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:40,866 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) [2022-07-21 09:03:40,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:03:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:40,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 09:03:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:41,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:03:41,119 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:03:41,119 INFO L390 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 11 treesize of output 11 [2022-07-21 09:03:41,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:03:41,302 INFO L390 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 [2022-07-21 09:03:41,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-21 09:03:41,405 INFO L390 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 15 treesize of output 7 [2022-07-21 09:03:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:41,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:41,714 INFO L390 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 10 treesize of output 8 [2022-07-21 09:03:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:41,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153393890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:41,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:41,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 9] total 30 [2022-07-21 09:03:41,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192283784] [2022-07-21 09:03:41,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:41,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 09:03:41,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 09:03:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:03:41,725 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2022-07-21 09:03:41,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 274 flow. Second operand has 30 states, 30 states have (on average 49.266666666666666) internal successors, (1478), 30 states have internal predecessors, (1478), 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) [2022-07-21 09:03:41,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:41,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2022-07-21 09:03:41,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:42,439 INFO L129 PetriNetUnfolder]: 325/771 cut-off events. [2022-07-21 09:03:42,439 INFO L130 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-07-21 09:03:42,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 771 events. 325/771 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3846 event pairs, 99 based on Foata normal form. 1/761 useless extension candidates. Maximal degree in co-relation 1859. Up to 330 conditions per place. [2022-07-21 09:03:42,444 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 90 selfloop transitions, 29 changer transitions 4/162 dead transitions. [2022-07-21 09:03:42,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 162 transitions, 727 flow [2022-07-21 09:03:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 09:03:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-21 09:03:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1112 transitions. [2022-07-21 09:03:42,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.432012432012432 [2022-07-21 09:03:42,447 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1112 transitions. [2022-07-21 09:03:42,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1112 transitions. [2022-07-21 09:03:42,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:42,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1112 transitions. [2022-07-21 09:03:42,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 50.54545454545455) internal successors, (1112), 22 states have internal predecessors, (1112), 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) [2022-07-21 09:03:42,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 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) [2022-07-21 09:03:42,452 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 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) [2022-07-21 09:03:42,452 INFO L186 Difference]: Start difference. First operand has 115 places, 103 transitions, 274 flow. Second operand 22 states and 1112 transitions. [2022-07-21 09:03:42,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 162 transitions, 727 flow [2022-07-21 09:03:42,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 162 transitions, 709 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 09:03:42,456 INFO L242 Difference]: Finished difference. Result has 138 places, 118 transitions, 425 flow [2022-07-21 09:03:42,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=425, PETRI_PLACES=138, PETRI_TRANSITIONS=118} [2022-07-21 09:03:42,457 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 34 predicate places. [2022-07-21 09:03:42,457 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 118 transitions, 425 flow [2022-07-21 09:03:42,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 49.266666666666666) internal successors, (1478), 30 states have internal predecessors, (1478), 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) [2022-07-21 09:03:42,458 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:42,458 INFO L200 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] [2022-07-21 09:03:42,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:42,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:42,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash -618781634, now seen corresponding path program 2 times [2022-07-21 09:03:42,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:42,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234115322] [2022-07-21 09:03:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:42,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:42,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:42,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234115322] [2022-07-21 09:03:42,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234115322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:42,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326469322] [2022-07-21 09:03:42,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:03:42,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:42,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:42,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:42,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:03:43,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:03:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:43,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 09:03:43,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:43,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:03:43,193 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:03:43,193 INFO L390 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 11 treesize of output 11 [2022-07-21 09:03:43,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:03:43,419 INFO L390 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 [2022-07-21 09:03:43,474 INFO L390 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 21 treesize of output 21 [2022-07-21 09:03:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:43,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:43,666 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= (+ c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-21 09:03:43,707 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-21 09:03:43,713 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= 0 (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-07-21 09:03:43,720 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset)) c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-21 09:03:43,731 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ c_~counter~0 (* (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) (- 1)) (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|))) 0)) is different from false [2022-07-21 09:03:43,738 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) c_~counter~0 (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) 0)) is different from false [2022-07-21 09:03:43,742 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) 0)) is different from false [2022-07-21 09:03:43,773 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:03:43,773 INFO L390 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 49 treesize of output 38 [2022-07-21 09:03:43,776 INFO L390 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 156 treesize of output 140 [2022-07-21 09:03:43,778 INFO L390 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 140 treesize of output 132 [2022-07-21 09:03:43,780 INFO L390 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 132 treesize of output 124 [2022-07-21 09:03:44,334 INFO L390 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 10 treesize of output 8 [2022-07-21 09:03:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 09:03:44,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326469322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:44,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:44,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 38 [2022-07-21 09:03:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073647328] [2022-07-21 09:03:44,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:44,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 09:03:44,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 09:03:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=829, Unknown=7, NotChecked=448, Total=1406 [2022-07-21 09:03:44,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2022-07-21 09:03:44,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 118 transitions, 425 flow. Second operand has 38 states, 38 states have (on average 48.5) internal successors, (1843), 38 states have internal predecessors, (1843), 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) [2022-07-21 09:03:44,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:44,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2022-07-21 09:03:44,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:45,308 INFO L129 PetriNetUnfolder]: 471/1065 cut-off events. [2022-07-21 09:03:45,308 INFO L130 PetriNetUnfolder]: For 1207/1207 co-relation queries the response was YES. [2022-07-21 09:03:45,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 1065 events. 471/1065 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6186 event pairs, 49 based on Foata normal form. 1/1055 useless extension candidates. Maximal degree in co-relation 2931. Up to 352 conditions per place. [2022-07-21 09:03:45,314 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 104 selfloop transitions, 49 changer transitions 4/196 dead transitions. [2022-07-21 09:03:45,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 196 transitions, 1052 flow [2022-07-21 09:03:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:03:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-21 09:03:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1313 transitions. [2022-07-21 09:03:45,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2022-07-21 09:03:45,318 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1313 transitions. [2022-07-21 09:03:45,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1313 transitions. [2022-07-21 09:03:45,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:45,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1313 transitions. [2022-07-21 09:03:45,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 50.5) internal successors, (1313), 26 states have internal predecessors, (1313), 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) [2022-07-21 09:03:45,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 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) [2022-07-21 09:03:45,325 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 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) [2022-07-21 09:03:45,325 INFO L186 Difference]: Start difference. First operand has 138 places, 118 transitions, 425 flow. Second operand 26 states and 1313 transitions. [2022-07-21 09:03:45,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 196 transitions, 1052 flow [2022-07-21 09:03:45,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 976 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-07-21 09:03:45,330 INFO L242 Difference]: Finished difference. Result has 151 places, 138 transitions, 619 flow [2022-07-21 09:03:45,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=619, PETRI_PLACES=151, PETRI_TRANSITIONS=138} [2022-07-21 09:03:45,330 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 47 predicate places. [2022-07-21 09:03:45,331 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 138 transitions, 619 flow [2022-07-21 09:03:45,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.5) internal successors, (1843), 38 states have internal predecessors, (1843), 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) [2022-07-21 09:03:45,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:45,332 INFO L200 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] [2022-07-21 09:03:45,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:45,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:45,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1246130652, now seen corresponding path program 3 times [2022-07-21 09:03:45,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:45,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796378859] [2022-07-21 09:03:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:45,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:45,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796378859] [2022-07-21 09:03:45,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796378859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978335458] [2022-07-21 09:03:45,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:03:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:45,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:45,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:03:46,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:03:46,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 09:03:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:46,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:46,299 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:03:46,300 INFO L390 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 24 treesize of output 25 [2022-07-21 09:03:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:46,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978335458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:46,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:46,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 8] total 26 [2022-07-21 09:03:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244398498] [2022-07-21 09:03:46,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:46,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 09:03:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 09:03:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-07-21 09:03:46,389 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-21 09:03:46,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 138 transitions, 619 flow. Second operand has 26 states, 26 states have (on average 52.38461538461539) internal successors, (1362), 26 states have internal predecessors, (1362), 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) [2022-07-21 09:03:46,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:46,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-21 09:03:46,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:46,967 INFO L129 PetriNetUnfolder]: 586/1308 cut-off events. [2022-07-21 09:03:46,967 INFO L130 PetriNetUnfolder]: For 1953/1953 co-relation queries the response was YES. [2022-07-21 09:03:46,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 1308 events. 586/1308 cut-off events. For 1953/1953 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8300 event pairs, 146 based on Foata normal form. 1/1294 useless extension candidates. Maximal degree in co-relation 3787. Up to 784 conditions per place. [2022-07-21 09:03:46,975 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 112 selfloop transitions, 31 changer transitions 4/189 dead transitions. [2022-07-21 09:03:46,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 189 transitions, 1122 flow [2022-07-21 09:03:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 09:03:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-21 09:03:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1173 transitions. [2022-07-21 09:03:46,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4557109557109557 [2022-07-21 09:03:46,979 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1173 transitions. [2022-07-21 09:03:46,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1173 transitions. [2022-07-21 09:03:46,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:46,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1173 transitions. [2022-07-21 09:03:46,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.31818181818182) internal successors, (1173), 22 states have internal predecessors, (1173), 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) [2022-07-21 09:03:46,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 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) [2022-07-21 09:03:46,984 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 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) [2022-07-21 09:03:46,984 INFO L186 Difference]: Start difference. First operand has 151 places, 138 transitions, 619 flow. Second operand 22 states and 1173 transitions. [2022-07-21 09:03:46,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 189 transitions, 1122 flow [2022-07-21 09:03:46,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 189 transitions, 1028 flow, removed 32 selfloop flow, removed 14 redundant places. [2022-07-21 09:03:46,991 INFO L242 Difference]: Finished difference. Result has 161 places, 148 transitions, 693 flow [2022-07-21 09:03:46,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=693, PETRI_PLACES=161, PETRI_TRANSITIONS=148} [2022-07-21 09:03:46,992 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 57 predicate places. [2022-07-21 09:03:46,992 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 148 transitions, 693 flow [2022-07-21 09:03:46,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.38461538461539) internal successors, (1362), 26 states have internal predecessors, (1362), 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) [2022-07-21 09:03:46,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:46,993 INFO L200 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] [2022-07-21 09:03:47,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:47,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1270727132, now seen corresponding path program 4 times [2022-07-21 09:03:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:47,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437625714] [2022-07-21 09:03:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:47,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437625714] [2022-07-21 09:03:47,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437625714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746065534] [2022-07-21 09:03:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:03:47,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:47,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:47,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:03:47,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:03:47,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 09:03:47,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:47,685 INFO L390 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 11 treesize of output 7 [2022-07-21 09:03:47,806 INFO L390 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 [2022-07-21 09:03:47,844 INFO L390 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 [2022-07-21 09:03:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:47,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:48,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746065534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:48,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:48,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 27 [2022-07-21 09:03:48,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767210760] [2022-07-21 09:03:48,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:48,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 09:03:48,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 09:03:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-21 09:03:48,051 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-21 09:03:48,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 148 transitions, 693 flow. Second operand has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 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) [2022-07-21 09:03:48,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:48,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-21 09:03:48,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:48,707 INFO L129 PetriNetUnfolder]: 701/1574 cut-off events. [2022-07-21 09:03:48,708 INFO L130 PetriNetUnfolder]: For 2197/2197 co-relation queries the response was YES. [2022-07-21 09:03:48,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 1574 events. 701/1574 cut-off events. For 2197/2197 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10496 event pairs, 231 based on Foata normal form. 1/1556 useless extension candidates. Maximal degree in co-relation 4489. Up to 806 conditions per place. [2022-07-21 09:03:48,731 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 115 selfloop transitions, 45 changer transitions 4/206 dead transitions. [2022-07-21 09:03:48,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 1261 flow [2022-07-21 09:03:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:03:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:03:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1275 transitions. [2022-07-21 09:03:48,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45405982905982906 [2022-07-21 09:03:48,734 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1275 transitions. [2022-07-21 09:03:48,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1275 transitions. [2022-07-21 09:03:48,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:48,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1275 transitions. [2022-07-21 09:03:48,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 53.125) internal successors, (1275), 24 states have internal predecessors, (1275), 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) [2022-07-21 09:03:48,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 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) [2022-07-21 09:03:48,739 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 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) [2022-07-21 09:03:48,739 INFO L186 Difference]: Start difference. First operand has 161 places, 148 transitions, 693 flow. Second operand 24 states and 1275 transitions. [2022-07-21 09:03:48,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 1261 flow [2022-07-21 09:03:48,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 206 transitions, 1195 flow, removed 11 selfloop flow, removed 16 redundant places. [2022-07-21 09:03:48,747 INFO L242 Difference]: Finished difference. Result has 169 places, 161 transitions, 840 flow [2022-07-21 09:03:48,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=840, PETRI_PLACES=169, PETRI_TRANSITIONS=161} [2022-07-21 09:03:48,748 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 65 predicate places. [2022-07-21 09:03:48,748 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 161 transitions, 840 flow [2022-07-21 09:03:48,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 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) [2022-07-21 09:03:48,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:48,749 INFO L200 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] [2022-07-21 09:03:48,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:48,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:48,966 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1059485982, now seen corresponding path program 5 times [2022-07-21 09:03:48,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:48,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525963971] [2022-07-21 09:03:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:49,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:49,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525963971] [2022-07-21 09:03:49,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525963971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:49,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186867333] [2022-07-21 09:03:49,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:03:49,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:49,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:49,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:49,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:03:49,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:03:49,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 09:03:49,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:49,427 INFO L390 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 11 treesize of output 7 [2022-07-21 09:03:49,545 INFO L390 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 [2022-07-21 09:03:49,582 INFO L390 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 [2022-07-21 09:03:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:49,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:49,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186867333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:49,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:49,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 28 [2022-07-21 09:03:49,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840556644] [2022-07-21 09:03:49,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:49,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:03:49,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:49,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:03:49,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:03:49,797 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-21 09:03:49,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 161 transitions, 840 flow. Second operand has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 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) [2022-07-21 09:03:49,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:49,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-21 09:03:49,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:50,514 INFO L129 PetriNetUnfolder]: 831/1856 cut-off events. [2022-07-21 09:03:50,514 INFO L130 PetriNetUnfolder]: For 3366/3366 co-relation queries the response was YES. [2022-07-21 09:03:50,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5581 conditions, 1856 events. 831/1856 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12821 event pairs, 244 based on Foata normal form. 1/1842 useless extension candidates. Maximal degree in co-relation 5556. Up to 832 conditions per place. [2022-07-21 09:03:50,525 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 120 selfloop transitions, 61 changer transitions 4/227 dead transitions. [2022-07-21 09:03:50,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 1523 flow [2022-07-21 09:03:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:03:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-21 09:03:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1380 transitions. [2022-07-21 09:03:50,530 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4536489151873767 [2022-07-21 09:03:50,530 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1380 transitions. [2022-07-21 09:03:50,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1380 transitions. [2022-07-21 09:03:50,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:50,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1380 transitions. [2022-07-21 09:03:50,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 53.07692307692308) internal successors, (1380), 26 states have internal predecessors, (1380), 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) [2022-07-21 09:03:50,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 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) [2022-07-21 09:03:50,540 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 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) [2022-07-21 09:03:50,540 INFO L186 Difference]: Start difference. First operand has 169 places, 161 transitions, 840 flow. Second operand 26 states and 1380 transitions. [2022-07-21 09:03:50,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 1523 flow [2022-07-21 09:03:50,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 227 transitions, 1396 flow, removed 45 selfloop flow, removed 16 redundant places. [2022-07-21 09:03:50,551 INFO L242 Difference]: Finished difference. Result has 179 places, 177 transitions, 1020 flow [2022-07-21 09:03:50,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1020, PETRI_PLACES=179, PETRI_TRANSITIONS=177} [2022-07-21 09:03:50,552 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 75 predicate places. [2022-07-21 09:03:50,552 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 177 transitions, 1020 flow [2022-07-21 09:03:50,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 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) [2022-07-21 09:03:50,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:50,553 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:50,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:50,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:50,770 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash -836879962, now seen corresponding path program 6 times [2022-07-21 09:03:50,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:50,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263054375] [2022-07-21 09:03:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:50,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:50,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:50,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263054375] [2022-07-21 09:03:50,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263054375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:50,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394584681] [2022-07-21 09:03:50,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:03:50,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:50,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:50,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:50,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:03:50,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:03:50,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:03:50,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:51,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:03:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394584681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:51,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:51,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-21 09:03:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329407636] [2022-07-21 09:03:51,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:03:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:03:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:03:51,298 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-21 09:03:51,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 177 transitions, 1020 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 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) [2022-07-21 09:03:51,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:51,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-21 09:03:51,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:51,696 INFO L129 PetriNetUnfolder]: 416/1418 cut-off events. [2022-07-21 09:03:51,697 INFO L130 PetriNetUnfolder]: For 2331/2349 co-relation queries the response was YES. [2022-07-21 09:03:51,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4124 conditions, 1418 events. 416/1418 cut-off events. For 2331/2349 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10225 event pairs, 113 based on Foata normal form. 41/1442 useless extension candidates. Maximal degree in co-relation 4097. Up to 383 conditions per place. [2022-07-21 09:03:51,704 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 174 selfloop transitions, 33 changer transitions 0/292 dead transitions. [2022-07-21 09:03:51,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 292 transitions, 2234 flow [2022-07-21 09:03:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:03:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:03:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2022-07-21 09:03:51,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2022-07-21 09:03:51,706 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2022-07-21 09:03:51,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2022-07-21 09:03:51,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:51,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2022-07-21 09:03:51,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 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) [2022-07-21 09:03:51,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 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) [2022-07-21 09:03:51,711 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 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) [2022-07-21 09:03:51,711 INFO L186 Difference]: Start difference. First operand has 179 places, 177 transitions, 1020 flow. Second operand 16 states and 1370 transitions. [2022-07-21 09:03:51,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 292 transitions, 2234 flow [2022-07-21 09:03:51,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 292 transitions, 2048 flow, removed 55 selfloop flow, removed 19 redundant places. [2022-07-21 09:03:51,721 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 1270 flow [2022-07-21 09:03:51,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1270, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2022-07-21 09:03:51,723 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 78 predicate places. [2022-07-21 09:03:51,723 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 1270 flow [2022-07-21 09:03:51,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 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) [2022-07-21 09:03:51,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:51,733 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:51,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 09:03:51,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 09:03:51,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash 447763680, now seen corresponding path program 7 times [2022-07-21 09:03:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:51,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810124108] [2022-07-21 09:03:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:52,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810124108] [2022-07-21 09:03:52,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810124108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901896255] [2022-07-21 09:03:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:03:52,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:52,054 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:52,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:03:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:52,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:03:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:52,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:52,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901896255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:52,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:52,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-21 09:03:52,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841782298] [2022-07-21 09:03:52,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:52,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:03:52,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:52,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:03:52,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:03:52,362 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-21 09:03:52,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 1270 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 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) [2022-07-21 09:03:52,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:52,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-21 09:03:52,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:52,775 INFO L129 PetriNetUnfolder]: 351/1201 cut-off events. [2022-07-21 09:03:52,775 INFO L130 PetriNetUnfolder]: For 2100/2138 co-relation queries the response was YES. [2022-07-21 09:03:52,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3682 conditions, 1201 events. 351/1201 cut-off events. For 2100/2138 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8505 event pairs, 135 based on Foata normal form. 62/1250 useless extension candidates. Maximal degree in co-relation 3650. Up to 453 conditions per place. [2022-07-21 09:03:52,782 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 101 selfloop transitions, 12 changer transitions 80/277 dead transitions. [2022-07-21 09:03:52,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 277 transitions, 2102 flow [2022-07-21 09:03:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:03:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:03:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2022-07-21 09:03:52,784 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2022-07-21 09:03:52,784 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2022-07-21 09:03:52,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2022-07-21 09:03:52,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:52,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2022-07-21 09:03:52,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 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) [2022-07-21 09:03:52,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 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) [2022-07-21 09:03:52,789 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 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) [2022-07-21 09:03:52,789 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 1270 flow. Second operand 16 states and 1370 transitions. [2022-07-21 09:03:52,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 277 transitions, 2102 flow [2022-07-21 09:03:52,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 2083 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-21 09:03:52,799 INFO L242 Difference]: Finished difference. Result has 198 places, 181 transitions, 1054 flow [2022-07-21 09:03:52,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1054, PETRI_PLACES=198, PETRI_TRANSITIONS=181} [2022-07-21 09:03:52,800 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 94 predicate places. [2022-07-21 09:03:52,800 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 181 transitions, 1054 flow [2022-07-21 09:03:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 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) [2022-07-21 09:03:52,801 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:52,801 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:52,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:03:53,018 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1322365107, now seen corresponding path program 8 times [2022-07-21 09:03:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:53,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682400846] [2022-07-21 09:03:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:03:53,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682400846] [2022-07-21 09:03:53,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682400846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287105729] [2022-07-21 09:03:53,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:03:53,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:53,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:53,094 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:53,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:03:53,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:03:53,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:53,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:03:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:03:53,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:03:53,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287105729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:53,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:53,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-07-21 09:03:53,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604929932] [2022-07-21 09:03:53,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:53,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:03:53,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:03:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:03:53,326 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2022-07-21 09:03:53,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 181 transitions, 1054 flow. Second operand has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 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) [2022-07-21 09:03:53,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:53,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2022-07-21 09:03:53,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:54,174 INFO L129 PetriNetUnfolder]: 427/1012 cut-off events. [2022-07-21 09:03:54,175 INFO L130 PetriNetUnfolder]: For 2446/2446 co-relation queries the response was YES. [2022-07-21 09:03:54,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3843 conditions, 1012 events. 427/1012 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5229 event pairs, 10 based on Foata normal form. 49/1059 useless extension candidates. Maximal degree in co-relation 3806. Up to 165 conditions per place. [2022-07-21 09:03:54,184 INFO L132 encePairwiseOnDemand]: 99/117 looper letters, 173 selfloop transitions, 117 changer transitions 0/354 dead transitions. [2022-07-21 09:03:54,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 354 transitions, 2806 flow [2022-07-21 09:03:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:03:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-21 09:03:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3191 transitions. [2022-07-21 09:03:54,188 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6993206223975454 [2022-07-21 09:03:54,188 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3191 transitions. [2022-07-21 09:03:54,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3191 transitions. [2022-07-21 09:03:54,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:54,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3191 transitions. [2022-07-21 09:03:54,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 81.82051282051282) internal successors, (3191), 39 states have internal predecessors, (3191), 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) [2022-07-21 09:03:54,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 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) [2022-07-21 09:03:54,198 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 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) [2022-07-21 09:03:54,199 INFO L186 Difference]: Start difference. First operand has 198 places, 181 transitions, 1054 flow. Second operand 39 states and 3191 transitions. [2022-07-21 09:03:54,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 354 transitions, 2806 flow [2022-07-21 09:03:54,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 354 transitions, 2479 flow, removed 127 selfloop flow, removed 22 redundant places. [2022-07-21 09:03:54,237 INFO L242 Difference]: Finished difference. Result has 225 places, 251 transitions, 1785 flow [2022-07-21 09:03:54,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1785, PETRI_PLACES=225, PETRI_TRANSITIONS=251} [2022-07-21 09:03:54,238 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 121 predicate places. [2022-07-21 09:03:54,238 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 251 transitions, 1785 flow [2022-07-21 09:03:54,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 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) [2022-07-21 09:03:54,238 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:54,238 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:54,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:54,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:03:54,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash -823728965, now seen corresponding path program 9 times [2022-07-21 09:03:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359535138] [2022-07-21 09:03:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:54,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:03:54,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359535138] [2022-07-21 09:03:54,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359535138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637002513] [2022-07-21 09:03:54,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:03:54,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:54,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:54,542 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:54,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:03:54,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:03:54,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:03:54,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:03:54,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:03:54,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637002513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:54,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:54,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-21 09:03:54,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956752868] [2022-07-21 09:03:54,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:54,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:03:54,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:54,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:03:54,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:03:54,945 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-21 09:03:54,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 251 transitions, 1785 flow. Second operand has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 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) [2022-07-21 09:03:54,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:54,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-21 09:03:54,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:55,264 INFO L129 PetriNetUnfolder]: 310/826 cut-off events. [2022-07-21 09:03:55,264 INFO L130 PetriNetUnfolder]: For 4356/4380 co-relation queries the response was YES. [2022-07-21 09:03:55,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 826 events. 310/826 cut-off events. For 4356/4380 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3903 event pairs, 39 based on Foata normal form. 35/850 useless extension candidates. Maximal degree in co-relation 3679. Up to 171 conditions per place. [2022-07-21 09:03:55,273 INFO L132 encePairwiseOnDemand]: 104/117 looper letters, 137 selfloop transitions, 57 changer transitions 0/312 dead transitions. [2022-07-21 09:03:55,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 312 transitions, 2625 flow [2022-07-21 09:03:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:03:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-21 09:03:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1280 transitions. [2022-07-21 09:03:55,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7293447293447294 [2022-07-21 09:03:55,275 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1280 transitions. [2022-07-21 09:03:55,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1280 transitions. [2022-07-21 09:03:55,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:55,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1280 transitions. [2022-07-21 09:03:55,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.33333333333333) internal successors, (1280), 15 states have internal predecessors, (1280), 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) [2022-07-21 09:03:55,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 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) [2022-07-21 09:03:55,279 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 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) [2022-07-21 09:03:55,279 INFO L186 Difference]: Start difference. First operand has 225 places, 251 transitions, 1785 flow. Second operand 15 states and 1280 transitions. [2022-07-21 09:03:55,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 312 transitions, 2625 flow [2022-07-21 09:03:55,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 312 transitions, 2590 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-07-21 09:03:55,296 INFO L242 Difference]: Finished difference. Result has 232 places, 259 transitions, 1984 flow [2022-07-21 09:03:55,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1984, PETRI_PLACES=232, PETRI_TRANSITIONS=259} [2022-07-21 09:03:55,297 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 128 predicate places. [2022-07-21 09:03:55,297 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 259 transitions, 1984 flow [2022-07-21 09:03:55,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 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) [2022-07-21 09:03:55,298 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:55,298 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:55,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:55,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:03:55,515 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash -459984071, now seen corresponding path program 10 times [2022-07-21 09:03:55,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195904151] [2022-07-21 09:03:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:56,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:56,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195904151] [2022-07-21 09:03:56,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195904151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:56,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332522433] [2022-07-21 09:03:56,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:03:56,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:56,247 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:56,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:03:56,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:03:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:56,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-21 09:03:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:56,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:03:56,821 INFO L390 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 [2022-07-21 09:03:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:03:57,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:57,270 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_359) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) (* (select .cse0 (+ c_~A~0.offset 4)) (- 1)) c_~counter~0)) 0)) is different from false [2022-07-21 09:03:57,284 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_359) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (select .cse0 (+ c_~A~0.offset 4)) (- 1)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0)) 0)) is different from false [2022-07-21 09:03:57,316 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:03:57,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-21 09:03:57,331 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-21 09:03:57,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-21 09:03:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-07-21 09:03:58,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332522433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:58,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:58,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 21] total 61 [2022-07-21 09:03:58,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836721721] [2022-07-21 09:03:58,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:58,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-21 09:03:58,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-21 09:03:58,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3220, Unknown=2, NotChecked=230, Total=3660 [2022-07-21 09:03:58,044 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-21 09:03:58,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 259 transitions, 1984 flow. Second operand has 61 states, 61 states have (on average 43.90163934426229) internal successors, (2678), 61 states have internal predecessors, (2678), 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) [2022-07-21 09:03:58,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:58,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-21 09:03:58,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:01,672 INFO L129 PetriNetUnfolder]: 1948/3543 cut-off events. [2022-07-21 09:04:01,673 INFO L130 PetriNetUnfolder]: For 17319/17319 co-relation queries the response was YES. [2022-07-21 09:04:01,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16097 conditions, 3543 events. 1948/3543 cut-off events. For 17319/17319 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22845 event pairs, 145 based on Foata normal form. 1/3533 useless extension candidates. Maximal degree in co-relation 16054. Up to 2096 conditions per place. [2022-07-21 09:04:01,701 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 394 selfloop transitions, 144 changer transitions 4/577 dead transitions. [2022-07-21 09:04:01,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 577 transitions, 5247 flow [2022-07-21 09:04:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 09:04:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-21 09:04:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2573 transitions. [2022-07-21 09:04:01,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.39984459984459986 [2022-07-21 09:04:01,705 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2573 transitions. [2022-07-21 09:04:01,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2573 transitions. [2022-07-21 09:04:01,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:01,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2573 transitions. [2022-07-21 09:04:01,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 46.78181818181818) internal successors, (2573), 55 states have internal predecessors, (2573), 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) [2022-07-21 09:04:01,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 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) [2022-07-21 09:04:01,714 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 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) [2022-07-21 09:04:01,714 INFO L186 Difference]: Start difference. First operand has 232 places, 259 transitions, 1984 flow. Second operand 55 states and 2573 transitions. [2022-07-21 09:04:01,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 577 transitions, 5247 flow [2022-07-21 09:04:01,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 577 transitions, 5107 flow, removed 14 selfloop flow, removed 12 redundant places. [2022-07-21 09:04:01,770 INFO L242 Difference]: Finished difference. Result has 290 places, 371 transitions, 3266 flow [2022-07-21 09:04:01,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=3266, PETRI_PLACES=290, PETRI_TRANSITIONS=371} [2022-07-21 09:04:01,770 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 186 predicate places. [2022-07-21 09:04:01,770 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 371 transitions, 3266 flow [2022-07-21 09:04:01,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 43.90163934426229) internal successors, (2678), 61 states have internal predecessors, (2678), 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) [2022-07-21 09:04:01,771 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:01,771 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:01,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:01,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:04:01,989 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1705508623, now seen corresponding path program 11 times [2022-07-21 09:04:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:01,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595506296] [2022-07-21 09:04:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:02,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:02,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595506296] [2022-07-21 09:04:02,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595506296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:02,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390403636] [2022-07-21 09:04:02,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:04:02,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:02,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:02,540 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:02,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:04:02,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:04:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 09:04:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:03,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:03,381 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:04:03,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-21 09:04:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:04:03,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390403636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:03,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:03,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 14] total 49 [2022-07-21 09:04:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168391331] [2022-07-21 09:04:03,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 09:04:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 09:04:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2181, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 09:04:03,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-21 09:04:03,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 371 transitions, 3266 flow. Second operand has 49 states, 49 states have (on average 51.326530612244895) internal successors, (2515), 49 states have internal predecessors, (2515), 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) [2022-07-21 09:04:03,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:03,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-21 09:04:03,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:06,051 INFO L129 PetriNetUnfolder]: 2510/4582 cut-off events. [2022-07-21 09:04:06,051 INFO L130 PetriNetUnfolder]: For 26191/26194 co-relation queries the response was YES. [2022-07-21 09:04:06,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23108 conditions, 4582 events. 2510/4582 cut-off events. For 26191/26194 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 31395 event pairs, 439 based on Foata normal form. 1/4552 useless extension candidates. Maximal degree in co-relation 23052. Up to 3125 conditions per place. [2022-07-21 09:04:06,090 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 450 selfloop transitions, 146 changer transitions 4/638 dead transitions. [2022-07-21 09:04:06,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 638 transitions, 6626 flow [2022-07-21 09:04:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 09:04:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-21 09:04:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2942 transitions. [2022-07-21 09:04:06,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45718725718725717 [2022-07-21 09:04:06,094 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2942 transitions. [2022-07-21 09:04:06,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2942 transitions. [2022-07-21 09:04:06,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:06,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2942 transitions. [2022-07-21 09:04:06,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 53.49090909090909) internal successors, (2942), 55 states have internal predecessors, (2942), 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) [2022-07-21 09:04:06,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 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) [2022-07-21 09:04:06,104 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 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) [2022-07-21 09:04:06,104 INFO L186 Difference]: Start difference. First operand has 290 places, 371 transitions, 3266 flow. Second operand 55 states and 2942 transitions. [2022-07-21 09:04:06,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 638 transitions, 6626 flow [2022-07-21 09:04:06,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 638 transitions, 6462 flow, removed 68 selfloop flow, removed 14 redundant places. [2022-07-21 09:04:06,203 INFO L242 Difference]: Finished difference. Result has 352 places, 451 transitions, 4562 flow [2022-07-21 09:04:06,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=4562, PETRI_PLACES=352, PETRI_TRANSITIONS=451} [2022-07-21 09:04:06,204 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 248 predicate places. [2022-07-21 09:04:06,204 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 451 transitions, 4562 flow [2022-07-21 09:04:06,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 51.326530612244895) internal successors, (2515), 49 states have internal predecessors, (2515), 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) [2022-07-21 09:04:06,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:06,205 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:06,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:06,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:04:06,422 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash 922626737, now seen corresponding path program 12 times [2022-07-21 09:04:06,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:06,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048729083] [2022-07-21 09:04:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:06,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:06,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:06,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048729083] [2022-07-21 09:04:06,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048729083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:06,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120188256] [2022-07-21 09:04:06,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:04:06,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:06,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:06,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:06,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:04:07,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:04:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-21 09:04:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:07,441 INFO L390 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 13 treesize of output 9 [2022-07-21 09:04:07,548 INFO L390 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 [2022-07-21 09:04:07,621 INFO L390 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 [2022-07-21 09:04:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:07,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:08,187 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_419 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_419) c_~A~0.base)) (.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset .cse1 4)))) 0)) is different from false [2022-07-21 09:04:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:04:08,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120188256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:08,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:08,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 15] total 59 [2022-07-21 09:04:08,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952680761] [2022-07-21 09:04:08,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:08,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 09:04:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 09:04:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3108, Unknown=1, NotChecked=112, Total=3422 [2022-07-21 09:04:08,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-21 09:04:08,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 451 transitions, 4562 flow. Second operand has 59 states, 59 states have (on average 44.03389830508475) internal successors, (2598), 59 states have internal predecessors, (2598), 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) [2022-07-21 09:04:08,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:08,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-21 09:04:08,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:11,939 INFO L129 PetriNetUnfolder]: 2927/5346 cut-off events. [2022-07-21 09:04:11,939 INFO L130 PetriNetUnfolder]: For 35445/35466 co-relation queries the response was YES. [2022-07-21 09:04:11,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28389 conditions, 5346 events. 2927/5346 cut-off events. For 35445/35466 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37839 event pairs, 518 based on Foata normal form. 15/5331 useless extension candidates. Maximal degree in co-relation 28310. Up to 3726 conditions per place. [2022-07-21 09:04:11,994 INFO L132 encePairwiseOnDemand]: 82/117 looper letters, 504 selfloop transitions, 208 changer transitions 4/751 dead transitions. [2022-07-21 09:04:11,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 751 transitions, 8468 flow [2022-07-21 09:04:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 09:04:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-21 09:04:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3244 transitions. [2022-07-21 09:04:11,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3960927960927961 [2022-07-21 09:04:11,998 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3244 transitions. [2022-07-21 09:04:11,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3244 transitions. [2022-07-21 09:04:11,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:11,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3244 transitions. [2022-07-21 09:04:12,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 46.34285714285714) internal successors, (3244), 70 states have internal predecessors, (3244), 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) [2022-07-21 09:04:12,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 117.0) internal successors, (8307), 71 states have internal predecessors, (8307), 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) [2022-07-21 09:04:12,009 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 117.0) internal successors, (8307), 71 states have internal predecessors, (8307), 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) [2022-07-21 09:04:12,009 INFO L186 Difference]: Start difference. First operand has 352 places, 451 transitions, 4562 flow. Second operand 70 states and 3244 transitions. [2022-07-21 09:04:12,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 751 transitions, 8468 flow [2022-07-21 09:04:12,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 751 transitions, 8331 flow, removed 33 selfloop flow, removed 26 redundant places. [2022-07-21 09:04:12,182 INFO L242 Difference]: Finished difference. Result has 408 places, 541 transitions, 6001 flow [2022-07-21 09:04:12,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=6001, PETRI_PLACES=408, PETRI_TRANSITIONS=541} [2022-07-21 09:04:12,183 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 304 predicate places. [2022-07-21 09:04:12,183 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 541 transitions, 6001 flow [2022-07-21 09:04:12,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 44.03389830508475) internal successors, (2598), 59 states have internal predecessors, (2598), 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) [2022-07-21 09:04:12,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:12,184 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:12,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-21 09:04:12,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:12,399 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1149062991, now seen corresponding path program 13 times [2022-07-21 09:04:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762349562] [2022-07-21 09:04:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:12,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:12,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762349562] [2022-07-21 09:04:12,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762349562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:12,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159837186] [2022-07-21 09:04:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:04:12,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:12,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:12,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:04:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 09:04:13,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:13,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:13,666 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:04:13,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-21 09:04:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:04:13,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159837186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:13,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:13,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 14] total 47 [2022-07-21 09:04:13,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248019015] [2022-07-21 09:04:13,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:13,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 09:04:13,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 09:04:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2003, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 09:04:13,791 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-21 09:04:13,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 541 transitions, 6001 flow. Second operand has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 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) [2022-07-21 09:04:13,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:13,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-21 09:04:13,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:17,255 INFO L129 PetriNetUnfolder]: 3440/6268 cut-off events. [2022-07-21 09:04:17,256 INFO L130 PetriNetUnfolder]: For 59767/59834 co-relation queries the response was YES. [2022-07-21 09:04:17,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38625 conditions, 6268 events. 3440/6268 cut-off events. For 59767/59834 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 45820 event pairs, 595 based on Foata normal form. 21/6258 useless extension candidates. Maximal degree in co-relation 38532. Up to 4025 conditions per place. [2022-07-21 09:04:17,330 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 539 selfloop transitions, 253 changer transitions 4/834 dead transitions. [2022-07-21 09:04:17,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 834 transitions, 10660 flow [2022-07-21 09:04:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 09:04:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-21 09:04:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3377 transitions. [2022-07-21 09:04:17,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4581467914801248 [2022-07-21 09:04:17,333 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3377 transitions. [2022-07-21 09:04:17,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3377 transitions. [2022-07-21 09:04:17,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:17,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3377 transitions. [2022-07-21 09:04:17,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 53.6031746031746) internal successors, (3377), 63 states have internal predecessors, (3377), 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) [2022-07-21 09:04:17,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 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) [2022-07-21 09:04:17,343 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 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) [2022-07-21 09:04:17,343 INFO L186 Difference]: Start difference. First operand has 408 places, 541 transitions, 6001 flow. Second operand 63 states and 3377 transitions. [2022-07-21 09:04:17,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 834 transitions, 10660 flow [2022-07-21 09:04:17,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 834 transitions, 10179 flow, removed 149 selfloop flow, removed 42 redundant places. [2022-07-21 09:04:17,718 INFO L242 Difference]: Finished difference. Result has 438 places, 616 transitions, 7211 flow [2022-07-21 09:04:17,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=7211, PETRI_PLACES=438, PETRI_TRANSITIONS=616} [2022-07-21 09:04:17,719 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 334 predicate places. [2022-07-21 09:04:17,719 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 616 transitions, 7211 flow [2022-07-21 09:04:17,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 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) [2022-07-21 09:04:17,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:17,720 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:17,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 09:04:17,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:17,923 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:17,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1238531119, now seen corresponding path program 14 times [2022-07-21 09:04:17,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:17,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840318874] [2022-07-21 09:04:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:17,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:18,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840318874] [2022-07-21 09:04:18,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840318874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532224481] [2022-07-21 09:04:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:04:18,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:18,368 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:18,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:04:18,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:04:18,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:18,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 09:04:18,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:04:18,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:19,061 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:04:19,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-21 09:04:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:04:19,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532224481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:19,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:19,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 14] total 48 [2022-07-21 09:04:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069340513] [2022-07-21 09:04:19,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:19,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 09:04:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 09:04:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 09:04:19,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-21 09:04:19,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 616 transitions, 7211 flow. Second operand has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 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) [2022-07-21 09:04:19,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:19,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-21 09:04:19,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:22,460 INFO L129 PetriNetUnfolder]: 3680/6721 cut-off events. [2022-07-21 09:04:22,460 INFO L130 PetriNetUnfolder]: For 74160/74223 co-relation queries the response was YES. [2022-07-21 09:04:22,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42934 conditions, 6721 events. 3680/6721 cut-off events. For 74160/74223 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 49923 event pairs, 751 based on Foata normal form. 20/6701 useless extension candidates. Maximal degree in co-relation 42830. Up to 4753 conditions per place. [2022-07-21 09:04:22,579 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 563 selfloop transitions, 231 changer transitions 4/836 dead transitions. [2022-07-21 09:04:22,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 836 transitions, 11231 flow [2022-07-21 09:04:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-21 09:04:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-07-21 09:04:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2986 transitions. [2022-07-21 09:04:22,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45573870573870573 [2022-07-21 09:04:22,585 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2986 transitions. [2022-07-21 09:04:22,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2986 transitions. [2022-07-21 09:04:22,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:22,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2986 transitions. [2022-07-21 09:04:22,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 53.32142857142857) internal successors, (2986), 56 states have internal predecessors, (2986), 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) [2022-07-21 09:04:22,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 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) [2022-07-21 09:04:22,660 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 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) [2022-07-21 09:04:22,660 INFO L186 Difference]: Start difference. First operand has 438 places, 616 transitions, 7211 flow. Second operand 56 states and 2986 transitions. [2022-07-21 09:04:22,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 836 transitions, 11231 flow [2022-07-21 09:04:23,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 836 transitions, 10805 flow, removed 136 selfloop flow, removed 30 redundant places. [2022-07-21 09:04:23,045 INFO L242 Difference]: Finished difference. Result has 470 places, 652 transitions, 8111 flow [2022-07-21 09:04:23,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=8111, PETRI_PLACES=470, PETRI_TRANSITIONS=652} [2022-07-21 09:04:23,051 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 366 predicate places. [2022-07-21 09:04:23,051 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 652 transitions, 8111 flow [2022-07-21 09:04:23,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 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) [2022-07-21 09:04:23,052 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:23,052 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:23,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:23,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:23,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1132419989, now seen corresponding path program 15 times [2022-07-21 09:04:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:23,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888732747] [2022-07-21 09:04:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:23,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:24,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888732747] [2022-07-21 09:04:24,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888732747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949542453] [2022-07-21 09:04:24,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:04:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:24,199 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:24,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:04:24,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:04:24,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:24,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 09:04:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:25,275 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:04:25,275 INFO L390 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 15 treesize of output 16 [2022-07-21 09:04:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:25,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:25,903 INFO L356 Elim1Store]: treesize reduction 29, result has 67.0 percent of original size [2022-07-21 09:04:25,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 71 [2022-07-21 09:04:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:26,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949542453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:26,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:26,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 25] total 77 [2022-07-21 09:04:26,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387897019] [2022-07-21 09:04:26,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:26,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-21 09:04:26,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-21 09:04:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=5413, Unknown=0, NotChecked=0, Total=5852 [2022-07-21 09:04:26,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-21 09:04:26,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 652 transitions, 8111 flow. Second operand has 77 states, 77 states have (on average 43.64935064935065) internal successors, (3361), 77 states have internal predecessors, (3361), 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) [2022-07-21 09:04:26,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:26,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-21 09:04:26,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:33,202 INFO L129 PetriNetUnfolder]: 4566/8409 cut-off events. [2022-07-21 09:04:33,203 INFO L130 PetriNetUnfolder]: For 100705/100769 co-relation queries the response was YES. [2022-07-21 09:04:33,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54347 conditions, 8409 events. 4566/8409 cut-off events. For 100705/100769 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 65920 event pairs, 778 based on Foata normal form. 18/8384 useless extension candidates. Maximal degree in co-relation 54237. Up to 5146 conditions per place. [2022-07-21 09:04:33,303 INFO L132 encePairwiseOnDemand]: 81/117 looper letters, 685 selfloop transitions, 384 changer transitions 10/1114 dead transitions. [2022-07-21 09:04:33,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1114 transitions, 15769 flow [2022-07-21 09:04:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-21 09:04:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-21 09:04:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3453 transitions. [2022-07-21 09:04:33,307 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3935042735042735 [2022-07-21 09:04:33,307 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3453 transitions. [2022-07-21 09:04:33,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3453 transitions. [2022-07-21 09:04:33,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:33,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3453 transitions. [2022-07-21 09:04:33,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 46.04) internal successors, (3453), 75 states have internal predecessors, (3453), 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) [2022-07-21 09:04:33,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 117.0) internal successors, (8892), 76 states have internal predecessors, (8892), 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) [2022-07-21 09:04:33,317 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 117.0) internal successors, (8892), 76 states have internal predecessors, (8892), 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) [2022-07-21 09:04:33,317 INFO L186 Difference]: Start difference. First operand has 470 places, 652 transitions, 8111 flow. Second operand 75 states and 3453 transitions. [2022-07-21 09:04:33,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1114 transitions, 15769 flow [2022-07-21 09:04:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1114 transitions, 14809 flow, removed 331 selfloop flow, removed 43 redundant places. [2022-07-21 09:04:33,851 INFO L242 Difference]: Finished difference. Result has 529 places, 854 transitions, 11722 flow [2022-07-21 09:04:33,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=7489, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=11722, PETRI_PLACES=529, PETRI_TRANSITIONS=854} [2022-07-21 09:04:33,852 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 425 predicate places. [2022-07-21 09:04:33,852 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 854 transitions, 11722 flow [2022-07-21 09:04:33,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 43.64935064935065) internal successors, (3361), 77 states have internal predecessors, (3361), 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) [2022-07-21 09:04:33,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:33,853 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:33,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:34,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:34,070 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1005576847, now seen corresponding path program 16 times [2022-07-21 09:04:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:34,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060244130] [2022-07-21 09:04:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:34,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:34,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060244130] [2022-07-21 09:04:34,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060244130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:34,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303228057] [2022-07-21 09:04:34,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:04:34,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:34,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:34,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:04:34,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:04:34,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 09:04:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:04:35,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:35,618 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:04:35,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-21 09:04:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:04:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303228057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:35,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 14] total 51 [2022-07-21 09:04:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147907859] [2022-07-21 09:04:35,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 09:04:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 09:04:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 09:04:35,738 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-21 09:04:35,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 854 transitions, 11722 flow. Second operand has 51 states, 51 states have (on average 44.11764705882353) internal successors, (2250), 51 states have internal predecessors, (2250), 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) [2022-07-21 09:04:35,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:35,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-21 09:04:35,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:40,179 INFO L129 PetriNetUnfolder]: 4760/8727 cut-off events. [2022-07-21 09:04:40,180 INFO L130 PetriNetUnfolder]: For 132788/132875 co-relation queries the response was YES. [2022-07-21 09:04:40,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64077 conditions, 8727 events. 4760/8727 cut-off events. For 132788/132875 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 68126 event pairs, 1066 based on Foata normal form. 20/8702 useless extension candidates. Maximal degree in co-relation 63940. Up to 6344 conditions per place. [2022-07-21 09:04:40,311 INFO L132 encePairwiseOnDemand]: 86/117 looper letters, 744 selfloop transitions, 228 changer transitions 4/1011 dead transitions. [2022-07-21 09:04:40,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1011 transitions, 15660 flow [2022-07-21 09:04:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 09:04:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-21 09:04:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2450 transitions. [2022-07-21 09:04:40,314 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.39509756490888565 [2022-07-21 09:04:40,314 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2450 transitions. [2022-07-21 09:04:40,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2450 transitions. [2022-07-21 09:04:40,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:40,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2450 transitions. [2022-07-21 09:04:40,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 46.22641509433962) internal successors, (2450), 53 states have internal predecessors, (2450), 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) [2022-07-21 09:04:40,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 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) [2022-07-21 09:04:40,321 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 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) [2022-07-21 09:04:40,321 INFO L186 Difference]: Start difference. First operand has 529 places, 854 transitions, 11722 flow. Second operand 53 states and 2450 transitions. [2022-07-21 09:04:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1011 transitions, 15660 flow [2022-07-21 09:04:41,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1011 transitions, 14939 flow, removed 292 selfloop flow, removed 38 redundant places. [2022-07-21 09:04:41,208 INFO L242 Difference]: Finished difference. Result has 542 places, 861 transitions, 11631 flow [2022-07-21 09:04:41,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=11011, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11631, PETRI_PLACES=542, PETRI_TRANSITIONS=861} [2022-07-21 09:04:41,209 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 438 predicate places. [2022-07-21 09:04:41,209 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 861 transitions, 11631 flow [2022-07-21 09:04:41,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 44.11764705882353) internal successors, (2250), 51 states have internal predecessors, (2250), 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) [2022-07-21 09:04:41,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:41,210 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:41,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:41,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:41,423 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash 191143539, now seen corresponding path program 17 times [2022-07-21 09:04:41,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:41,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250189430] [2022-07-21 09:04:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:41,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:41,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250189430] [2022-07-21 09:04:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250189430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092920478] [2022-07-21 09:04:41,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:04:41,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:41,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:41,978 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:41,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:04:42,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:04:42,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:42,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-21 09:04:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:42,428 INFO L390 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 13 treesize of output 9 [2022-07-21 09:04:42,582 INFO L390 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 [2022-07-21 09:04:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:04:42,795 INFO L390 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 [2022-07-21 09:04:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:42,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:43,155 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-21 09:04:43,171 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-21 09:04:43,175 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)))) 0)) is different from false [2022-07-21 09:04:43,180 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base)) (.cse0 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (* (- 1) (select .cse1 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse1 (+ c_~A~0.offset 4))) (select .cse1 (+ c_~A~0.offset .cse0 4)))) 0)) is different from false [2022-07-21 09:04:43,186 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base) c_~A~0.offset)) c_~counter~0) 0)) is different from false [2022-07-21 09:04:43,192 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base) c_~A~0.offset)) c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-21 09:04:43,201 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ c_~counter~0 (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|))) 0)) is different from false [2022-07-21 09:04:43,207 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) 0)) is different from false [2022-07-21 09:04:43,211 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~counter~0)) 0)) is different from false [2022-07-21 09:04:43,226 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:04:43,226 INFO L390 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 49 treesize of output 38 [2022-07-21 09:04:43,229 INFO L390 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 322 treesize of output 290 [2022-07-21 09:04:43,231 INFO L390 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 290 treesize of output 274 [2022-07-21 09:04:43,234 INFO L390 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 274 treesize of output 258 [2022-07-21 09:04:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 13 not checked. [2022-07-21 09:04:43,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092920478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:43,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:43,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 23] total 64 [2022-07-21 09:04:43,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399204209] [2022-07-21 09:04:43,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:43,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-21 09:04:43,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:43,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-21 09:04:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2796, Unknown=9, NotChecked=1026, Total=4032 [2022-07-21 09:04:43,420 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2022-07-21 09:04:43,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 861 transitions, 11631 flow. Second operand has 64 states, 64 states have (on average 40.890625) internal successors, (2617), 64 states have internal predecessors, (2617), 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) [2022-07-21 09:04:43,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:43,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2022-07-21 09:04:43,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:50,161 INFO L129 PetriNetUnfolder]: 6320/11529 cut-off events. [2022-07-21 09:04:50,162 INFO L130 PetriNetUnfolder]: For 174299/174390 co-relation queries the response was YES. [2022-07-21 09:04:50,295 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86340 conditions, 11529 events. 6320/11529 cut-off events. For 174299/174390 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 93851 event pairs, 1166 based on Foata normal form. 20/11510 useless extension candidates. Maximal degree in co-relation 86205. Up to 7834 conditions per place. [2022-07-21 09:04:50,358 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 1014 selfloop transitions, 423 changer transitions 4/1473 dead transitions. [2022-07-21 09:04:50,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1473 transitions, 24158 flow [2022-07-21 09:04:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 09:04:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-21 09:04:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 2669 transitions. [2022-07-21 09:04:50,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.37396665265517726 [2022-07-21 09:04:50,362 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 2669 transitions. [2022-07-21 09:04:50,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 2669 transitions. [2022-07-21 09:04:50,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:04:50,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 2669 transitions. [2022-07-21 09:04:50,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 43.75409836065574) internal successors, (2669), 61 states have internal predecessors, (2669), 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) [2022-07-21 09:04:50,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 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) [2022-07-21 09:04:50,392 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 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) [2022-07-21 09:04:50,392 INFO L186 Difference]: Start difference. First operand has 542 places, 861 transitions, 11631 flow. Second operand 61 states and 2669 transitions. [2022-07-21 09:04:50,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1473 transitions, 24158 flow [2022-07-21 09:04:51,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1473 transitions, 23559 flow, removed 38 selfloop flow, removed 49 redundant places. [2022-07-21 09:04:51,550 INFO L242 Difference]: Finished difference. Result has 579 places, 1215 transitions, 18982 flow [2022-07-21 09:04:51,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=11259, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=18982, PETRI_PLACES=579, PETRI_TRANSITIONS=1215} [2022-07-21 09:04:51,551 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 475 predicate places. [2022-07-21 09:04:51,551 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1215 transitions, 18982 flow [2022-07-21 09:04:51,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 40.890625) internal successors, (2617), 64 states have internal predecessors, (2617), 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) [2022-07-21 09:04:51,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:04:51,552 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:04:51,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 09:04:51,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:51,772 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:04:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:04:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash -771135465, now seen corresponding path program 18 times [2022-07-21 09:04:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:04:51,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949071028] [2022-07-21 09:04:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:04:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:04:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:04:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:04:52,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:04:52,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949071028] [2022-07-21 09:04:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949071028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:04:52,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992160552] [2022-07-21 09:04:52,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:04:52,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:04:52,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:04:52,566 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:04:52,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:04:52,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:04:52,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:04:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 09:04:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:04:53,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:04:53,139 INFO L390 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 [2022-07-21 09:04:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:04:53,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:04:53,484 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)))) 0)) is different from false [2022-07-21 09:04:53,495 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)))) 0)) is different from false [2022-07-21 09:04:53,499 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)))) 0)) is different from false [2022-07-21 09:04:53,526 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:04:53,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-21 09:04:53,543 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-21 09:04:53,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-21 09:04:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-21 09:04:53,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992160552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:04:53,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:04:53,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21, 21] total 57 [2022-07-21 09:04:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479582062] [2022-07-21 09:04:53,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:04:53,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 09:04:53,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:04:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 09:04:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2691, Unknown=3, NotChecked=318, Total=3192 [2022-07-21 09:04:53,960 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-21 09:04:53,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1215 transitions, 18982 flow. Second operand has 57 states, 57 states have (on average 42.05263157894737) internal successors, (2397), 57 states have internal predecessors, (2397), 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) [2022-07-21 09:04:53,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:04:53,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-21 09:04:53,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:01,187 INFO L129 PetriNetUnfolder]: 7049/12919 cut-off events. [2022-07-21 09:05:01,187 INFO L130 PetriNetUnfolder]: For 339589/339738 co-relation queries the response was YES. [2022-07-21 09:05:01,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115209 conditions, 12919 events. 7049/12919 cut-off events. For 339589/339738 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 108110 event pairs, 1607 based on Foata normal form. 41/12890 useless extension candidates. Maximal degree in co-relation 115049. Up to 9093 conditions per place. [2022-07-21 09:05:01,471 INFO L132 encePairwiseOnDemand]: 85/117 looper letters, 958 selfloop transitions, 485 changer transitions 4/1479 dead transitions. [2022-07-21 09:05:01,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1479 transitions, 26102 flow [2022-07-21 09:05:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 09:05:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-21 09:05:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2237 transitions. [2022-07-21 09:05:01,474 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3823931623931624 [2022-07-21 09:05:01,474 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2237 transitions. [2022-07-21 09:05:01,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2237 transitions. [2022-07-21 09:05:01,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:01,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2237 transitions. [2022-07-21 09:05:01,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 44.74) internal successors, (2237), 50 states have internal predecessors, (2237), 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) [2022-07-21 09:05:01,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 117.0) internal successors, (5967), 51 states have internal predecessors, (5967), 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) [2022-07-21 09:05:01,480 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 117.0) internal successors, (5967), 51 states have internal predecessors, (5967), 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) [2022-07-21 09:05:01,480 INFO L186 Difference]: Start difference. First operand has 579 places, 1215 transitions, 18982 flow. Second operand 50 states and 2237 transitions. [2022-07-21 09:05:01,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1479 transitions, 26102 flow [2022-07-21 09:05:03,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1479 transitions, 25450 flow, removed 207 selfloop flow, removed 28 redundant places. [2022-07-21 09:05:03,435 INFO L242 Difference]: Finished difference. Result has 611 places, 1317 transitions, 21841 flow [2022-07-21 09:05:03,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=18424, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=21841, PETRI_PLACES=611, PETRI_TRANSITIONS=1317} [2022-07-21 09:05:03,436 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 507 predicate places. [2022-07-21 09:05:03,436 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 1317 transitions, 21841 flow [2022-07-21 09:05:03,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 42.05263157894737) internal successors, (2397), 57 states have internal predecessors, (2397), 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) [2022-07-21 09:05:03,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:03,437 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:03,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:03,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-21 09:05:03,654 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:05:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2086619099, now seen corresponding path program 19 times [2022-07-21 09:05:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:03,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538041814] [2022-07-21 09:05:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:04,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538041814] [2022-07-21 09:05:04,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538041814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:04,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768548602] [2022-07-21 09:05:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:05:04,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:04,440 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:05:04,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:05:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:04,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-21 09:05:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:04,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:05:04,615 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:05:04,615 INFO L390 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 11 treesize of output 11 [2022-07-21 09:05:04,936 INFO L390 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 [2022-07-21 09:05:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:05:05,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:05,315 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0)) is different from false [2022-07-21 09:05:05,326 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-21 09:05:05,330 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-21 09:05:05,358 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:05:05,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-21 09:05:05,375 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-21 09:05:05,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-21 09:05:05,715 INFO L390 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 10 treesize of output 8 [2022-07-21 09:05:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-21 09:05:05,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768548602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:05,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:05,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 21] total 57 [2022-07-21 09:05:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621077638] [2022-07-21 09:05:05,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:05,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 09:05:05,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:05,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 09:05:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2669, Unknown=3, NotChecked=318, Total=3192 [2022-07-21 09:05:05,727 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-21 09:05:05,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1317 transitions, 21841 flow. Second operand has 57 states, 57 states have (on average 41.91228070175438) internal successors, (2389), 57 states have internal predecessors, (2389), 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) [2022-07-21 09:05:05,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:05,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-21 09:05:05,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:14,230 INFO L129 PetriNetUnfolder]: 8591/15839 cut-off events. [2022-07-21 09:05:14,230 INFO L130 PetriNetUnfolder]: For 467646/467791 co-relation queries the response was YES. [2022-07-21 09:05:14,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148210 conditions, 15839 events. 8591/15839 cut-off events. For 467646/467791 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 136120 event pairs, 1836 based on Foata normal form. 49/15817 useless extension candidates. Maximal degree in co-relation 148038. Up to 10046 conditions per place. [2022-07-21 09:05:14,719 INFO L132 encePairwiseOnDemand]: 84/117 looper letters, 1242 selfloop transitions, 820 changer transitions 8/2102 dead transitions. [2022-07-21 09:05:14,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2102 transitions, 40509 flow [2022-07-21 09:05:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-21 09:05:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-21 09:05:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 3469 transitions. [2022-07-21 09:05:14,722 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.38012272627657245 [2022-07-21 09:05:14,722 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 3469 transitions. [2022-07-21 09:05:14,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 3469 transitions. [2022-07-21 09:05:14,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:14,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 3469 transitions. [2022-07-21 09:05:14,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 44.47435897435897) internal successors, (3469), 78 states have internal predecessors, (3469), 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) [2022-07-21 09:05:14,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 117.0) internal successors, (9243), 79 states have internal predecessors, (9243), 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) [2022-07-21 09:05:14,730 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 117.0) internal successors, (9243), 79 states have internal predecessors, (9243), 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) [2022-07-21 09:05:14,730 INFO L186 Difference]: Start difference. First operand has 611 places, 1317 transitions, 21841 flow. Second operand 78 states and 3469 transitions. [2022-07-21 09:05:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2102 transitions, 40509 flow [2022-07-21 09:05:17,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 2102 transitions, 39748 flow, removed 268 selfloop flow, removed 33 redundant places. [2022-07-21 09:05:17,697 INFO L242 Difference]: Finished difference. Result has 691 places, 1803 transitions, 34108 flow [2022-07-21 09:05:17,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=21092, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=34108, PETRI_PLACES=691, PETRI_TRANSITIONS=1803} [2022-07-21 09:05:17,699 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 587 predicate places. [2022-07-21 09:05:17,699 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 1803 transitions, 34108 flow [2022-07-21 09:05:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 41.91228070175438) internal successors, (2389), 57 states have internal predecessors, (2389), 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) [2022-07-21 09:05:17,700 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:17,700 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:17,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:17,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-21 09:05:17,917 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:05:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1982964057, now seen corresponding path program 20 times [2022-07-21 09:05:17,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:17,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634305235] [2022-07-21 09:05:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:17,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:18,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634305235] [2022-07-21 09:05:18,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634305235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212400486] [2022-07-21 09:05:18,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:05:18,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:18,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:18,544 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:05:18,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 09:05:18,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:05:18,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:05:18,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 09:05:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:19,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:05:19,110 INFO L390 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 [2022-07-21 09:05:19,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:05:19,288 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:05:19,288 INFO L390 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 31 treesize of output 14 [2022-07-21 09:05:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:05:19,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:19,503 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-21 09:05:19,515 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-21 09:05:19,520 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-21 09:05:19,551 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-21 09:05:19,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-21 09:05:19,570 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-21 09:05:19,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-21 09:05:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-21 09:05:20,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212400486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:20,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:20,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 57 [2022-07-21 09:05:20,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108228839] [2022-07-21 09:05:20,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:20,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 09:05:20,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:20,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 09:05:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2688, Unknown=3, NotChecked=318, Total=3192 [2022-07-21 09:05:20,017 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-21 09:05:20,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 1803 transitions, 34108 flow. Second operand has 57 states, 57 states have (on average 42.01754385964912) internal successors, (2395), 57 states have internal predecessors, (2395), 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) [2022-07-21 09:05:20,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:20,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-21 09:05:20,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:05:33,055 INFO L129 PetriNetUnfolder]: 9890/18288 cut-off events. [2022-07-21 09:05:33,056 INFO L130 PetriNetUnfolder]: For 1442790/1443011 co-relation queries the response was YES. [2022-07-21 09:05:33,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219193 conditions, 18288 events. 9890/18288 cut-off events. For 1442790/1443011 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 161420 event pairs, 2111 based on Foata normal form. 124/18332 useless extension candidates. Maximal degree in co-relation 218984. Up to 10746 conditions per place. [2022-07-21 09:05:33,780 INFO L132 encePairwiseOnDemand]: 84/117 looper letters, 1205 selfloop transitions, 1261 changer transitions 4/2502 dead transitions. [2022-07-21 09:05:33,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2502 transitions, 54277 flow [2022-07-21 09:05:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 09:05:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-21 09:05:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3152 transitions. [2022-07-21 09:05:33,783 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.37943902732635126 [2022-07-21 09:05:33,784 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3152 transitions. [2022-07-21 09:05:33,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3152 transitions. [2022-07-21 09:05:33,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:05:33,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3152 transitions. [2022-07-21 09:05:33,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 44.394366197183096) internal successors, (3152), 71 states have internal predecessors, (3152), 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) [2022-07-21 09:05:33,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 117.0) internal successors, (8424), 72 states have internal predecessors, (8424), 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) [2022-07-21 09:05:33,792 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 117.0) internal successors, (8424), 72 states have internal predecessors, (8424), 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) [2022-07-21 09:05:33,792 INFO L186 Difference]: Start difference. First operand has 691 places, 1803 transitions, 34108 flow. Second operand 71 states and 3152 transitions. [2022-07-21 09:05:33,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2502 transitions, 54277 flow [2022-07-21 09:05:40,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 2502 transitions, 52715 flow, removed 645 selfloop flow, removed 38 redundant places. [2022-07-21 09:05:40,480 INFO L242 Difference]: Finished difference. Result has 738 places, 2196 transitions, 45047 flow [2022-07-21 09:05:40,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=32754, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=915, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=45047, PETRI_PLACES=738, PETRI_TRANSITIONS=2196} [2022-07-21 09:05:40,482 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 634 predicate places. [2022-07-21 09:05:40,482 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2196 transitions, 45047 flow [2022-07-21 09:05:40,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 42.01754385964912) internal successors, (2395), 57 states have internal predecessors, (2395), 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) [2022-07-21 09:05:40,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:05:40,483 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:05:40,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 09:05:40,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 09:05:40,700 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:05:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:05:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash 722800081, now seen corresponding path program 21 times [2022-07-21 09:05:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:05:40,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096608400] [2022-07-21 09:05:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:05:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:05:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:05:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:05:41,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096608400] [2022-07-21 09:05:41,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096608400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:05:41,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803908922] [2022-07-21 09:05:41,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:05:41,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:05:41,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:05:41,390 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:05:41,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 09:05:41,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:05:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:05:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-21 09:05:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:05:41,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-07-21 09:05:41,685 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:05:41,685 INFO L390 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 11 treesize of output 11 [2022-07-21 09:05:41,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-21 09:05:42,184 INFO L390 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 [2022-07-21 09:05:42,431 INFO L390 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 [2022-07-21 09:05:42,663 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:05:42,663 INFO L390 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 19 treesize of output 20 [2022-07-21 09:05:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:05:42,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:05:43,255 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) is different from false [2022-07-21 09:05:43,262 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2022-07-21 09:05:43,302 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4))))) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< (+ |c_thread1Thread1of1ForFork0_#t~post1#1| 1) c_~N~0))) is different from false [2022-07-21 09:05:45,490 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0)) (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse0 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (select .cse1 (+ c_~A~0.offset .cse0 4)) (* (- 1) (select .cse1 c_~A~0.offset)) (* (- 1) (select .cse1 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0)) 0)))) is different from false [2022-07-21 09:05:45,513 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset 4)))) 0) (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< 1 c_~N~0))) is different from false [2022-07-21 09:05:45,532 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse1 (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (* (- 1) (select .cse1 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse1 (+ c_~A~0.offset 4)) (* (- 1) (select .cse1 c_~A~0.offset))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-21 09:05:45,568 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_main_#t~ret8#1.base|))) (+ (* (- 1) (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) (select (select .cse1 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) c_~counter~0 (* (- 1) (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|))))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-21 09:05:45,591 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) (* (- 1) (select .cse0 (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) (* (- 1) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-21 09:05:45,603 WARN L833 $PredicateComparison]: unable to prove that (or (not (< 1 c_~N~0)) (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse0 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (* (- 1) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (* (- 1) (select .cse0 (+ (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) 0) (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0))))) is different from false [2022-07-21 09:05:45,866 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:05:45,866 INFO L390 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 103 treesize of output 68 [2022-07-21 09:05:45,879 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-21 09:05:45,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 244 [2022-07-21 09:05:45,891 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-21 09:05:45,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 216 [2022-07-21 09:05:45,904 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-21 09:05:45,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 168 [2022-07-21 09:05:47,018 INFO L390 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 10 treesize of output 8 [2022-07-21 09:05:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-21 09:05:47,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803908922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:05:47,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:05:47,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 91 [2022-07-21 09:05:47,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374672545] [2022-07-21 09:05:47,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:05:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-21 09:05:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:05:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-21 09:05:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=6181, Unknown=41, NotChecked=1512, Total=8190 [2022-07-21 09:05:47,029 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2022-07-21 09:05:47,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2196 transitions, 45047 flow. Second operand has 91 states, 91 states have (on average 40.2967032967033) internal successors, (3667), 91 states have internal predecessors, (3667), 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) [2022-07-21 09:05:47,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:05:47,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2022-07-21 09:05:47,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:07,642 INFO L129 PetriNetUnfolder]: 12265/22852 cut-off events. [2022-07-21 09:06:07,643 INFO L130 PetriNetUnfolder]: For 1795430/1795738 co-relation queries the response was YES. [2022-07-21 09:06:08,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273291 conditions, 22852 events. 12265/22852 cut-off events. For 1795430/1795738 co-relation queries the response was YES. Maximal size of possible extension queue 1073. Compared 209406 event pairs, 2045 based on Foata normal form. 84/22881 useless extension candidates. Maximal degree in co-relation 273066. Up to 12336 conditions per place.