./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.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 e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:04:15,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:04:15,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:04:15,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:04:15,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:04:15,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:04:15,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:04:15,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:04:15,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:04:15,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:04:15,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:04:15,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:04:15,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:04:15,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:04:15,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:04:15,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:04:15,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:04:15,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:04:15,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:04:15,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:04:15,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:04:15,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:04:15,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:04:15,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:04:15,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:04:15,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:04:15,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:04:15,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:04:15,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:04:15,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:04:15,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:04:15,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:04:15,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:04:15,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:04:15,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:04:15,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:04:15,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:04:15,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:04:15,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:04:15,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:04:15,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:04:15,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:04:15,583 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:04:15,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:04:15,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:04:15,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:04:15,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:04:15,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:04:15,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:04:15,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:04:15,586 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:04:15,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:04:15,587 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:04:15,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:04:15,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:04:15,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:04:15,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:04:15,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:04:15,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:04:15,589 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:04:15,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:04:15,589 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:04:15,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:04:15,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:04:15,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:04:15,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:04:15,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:04:15,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:04:15,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:04:15,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:04:15,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:04:15,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:04:15,591 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:04:15,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:04:15,592 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:04:15,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:04:15,592 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:04:15,592 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:04:15,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:04:15,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:04:15,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:04:15,915 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:04:15,916 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:04:15,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-09-01 13:04:17,051 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:04:17,249 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:04:17,250 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c [2023-09-01 13:04:17,255 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e187e1eb5/ba9aa11efe9548029809d769baad8faf/FLAG7fd8567e1 [2023-09-01 13:04:17,272 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e187e1eb5/ba9aa11efe9548029809d769baad8faf [2023-09-01 13:04:17,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:04:17,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:04:17,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:04:17,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:04:17,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:04:17,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d0c123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17, skipping insertion in model container [2023-09-01 13:04:17,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:04:17,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:04:17,467 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2023-09-01 13:04:17,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:04:17,500 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:04:17,539 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2023-09-01 13:04:17,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:04:17,563 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:04:17,564 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:04:17,575 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:04:17,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17 WrapperNode [2023-09-01 13:04:17,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:04:17,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:04:17,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:04:17,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:04:17,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,646 INFO L138 Inliner]: procedures = 28, calls = 74, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 369 [2023-09-01 13:04:17,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:04:17,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:04:17,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:04:17,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:04:17,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:04:17,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:04:17,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:04:17,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:04:17,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (1/1) ... [2023-09-01 13:04:17,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:04:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:17,751 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) [2023-09-01 13:04:17,786 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 [2023-09-01 13:04:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:04:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 13:04:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:04:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:04:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:04:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 13:04:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:04:17,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:04:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:04:17,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:04:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:04:17,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:04:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:04:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:04:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:04:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:04:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:04:17,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:04:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:04:17,813 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:04:17,995 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:04:17,996 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:04:18,478 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:04:18,641 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:04:18,642 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-09-01 13:04:18,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:04:18 BoogieIcfgContainer [2023-09-01 13:04:18,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:04:18,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:04:18,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:04:18,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:04:18,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:04:17" (1/3) ... [2023-09-01 13:04:18,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa66b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:04:18, skipping insertion in model container [2023-09-01 13:04:18,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:04:17" (2/3) ... [2023-09-01 13:04:18,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa66b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:04:18, skipping insertion in model container [2023-09-01 13:04:18,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:04:18" (3/3) ... [2023-09-01 13:04:18,651 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2023-09-01 13:04:18,658 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:04:18,666 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:04:18,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:04:18,666 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:04:18,740 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:04:18,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 330 transitions, 684 flow [2023-09-01 13:04:18,924 INFO L130 PetriNetUnfolder]: 35/327 cut-off events. [2023-09-01 13:04:18,925 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:04:18,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 327 events. 35/327 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 643 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 262. Up to 2 conditions per place. [2023-09-01 13:04:18,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 330 transitions, 684 flow [2023-09-01 13:04:18,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 317 transitions, 652 flow [2023-09-01 13:04:18,942 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:04:18,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 317 transitions, 652 flow [2023-09-01 13:04:18,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 317 transitions, 652 flow [2023-09-01 13:04:18,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 317 transitions, 652 flow [2023-09-01 13:04:19,026 INFO L130 PetriNetUnfolder]: 35/317 cut-off events. [2023-09-01 13:04:19,027 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:04:19,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 317 events. 35/317 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 642 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 262. Up to 2 conditions per place. [2023-09-01 13:04:19,037 INFO L119 LiptonReduction]: Number of co-enabled transitions 11934 [2023-09-01 13:04:30,583 INFO L134 LiptonReduction]: Checked pairs total: 13624 [2023-09-01 13:04:30,583 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-09-01 13:04:30,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:04:30,600 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a48504e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:04:30,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:04:30,608 INFO L130 PetriNetUnfolder]: 11/41 cut-off events. [2023-09-01 13:04:30,609 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:04:30,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:30,609 INFO L208 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] [2023-09-01 13:04:30,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:30,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:30,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1858210275, now seen corresponding path program 1 times [2023-09-01 13:04:30,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:30,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653865317] [2023-09-01 13:04:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:31,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:31,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653865317] [2023-09-01 13:04:31,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653865317] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:31,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:31,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:04:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327128495] [2023-09-01 13:04:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:31,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:04:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:04:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:04:31,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 684 [2023-09-01 13:04:31,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:31,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:31,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 684 [2023-09-01 13:04:31,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:31,661 INFO L130 PetriNetUnfolder]: 2127/2864 cut-off events. [2023-09-01 13:04:31,662 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-09-01 13:04:31,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 2864 events. 2127/2864 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 12245 event pairs, 407 based on Foata normal form. 1/1923 useless extension candidates. Maximal degree in co-relation 5357. Up to 2091 conditions per place. [2023-09-01 13:04:31,676 INFO L137 encePairwiseOnDemand]: 677/684 looper letters, 58 selfloop transitions, 4 changer transitions 1/66 dead transitions. [2023-09-01 13:04:31,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 291 flow [2023-09-01 13:04:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:04:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:04:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 965 transitions. [2023-09-01 13:04:31,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702729044834308 [2023-09-01 13:04:31,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 965 transitions. [2023-09-01 13:04:31,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 965 transitions. [2023-09-01 13:04:31,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:31,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 965 transitions. [2023-09-01 13:04:31,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:31,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 684.0) internal successors, (2736), 4 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:31,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 684.0) internal successors, (2736), 4 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:31,718 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 102 flow. Second operand 3 states and 965 transitions. [2023-09-01 13:04:31,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 291 flow [2023-09-01 13:04:31,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 66 transitions, 269 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:04:31,728 INFO L231 Difference]: Finished difference. Result has 38 places, 43 transitions, 112 flow [2023-09-01 13:04:31,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=43} [2023-09-01 13:04:31,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-09-01 13:04:31,736 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 43 transitions, 112 flow [2023-09-01 13:04:31,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:31,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:31,738 INFO L208 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] [2023-09-01 13:04:31,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:04:31,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:31,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash -502966875, now seen corresponding path program 1 times [2023-09-01 13:04:31,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:31,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533707748] [2023-09-01 13:04:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:31,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533707748] [2023-09-01 13:04:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533707748] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:31,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:31,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:04:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854965934] [2023-09-01 13:04:31,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:31,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:04:31,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:04:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:04:31,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 684 [2023-09-01 13:04:31,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 43 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:31,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:31,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 684 [2023-09-01 13:04:31,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:32,561 INFO L130 PetriNetUnfolder]: 3563/4923 cut-off events. [2023-09-01 13:04:32,561 INFO L131 PetriNetUnfolder]: For 551/551 co-relation queries the response was YES. [2023-09-01 13:04:32,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10913 conditions, 4923 events. 3563/4923 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24879 event pairs, 2128 based on Foata normal form. 189/3992 useless extension candidates. Maximal degree in co-relation 3124. Up to 2836 conditions per place. [2023-09-01 13:04:32,586 INFO L137 encePairwiseOnDemand]: 679/684 looper letters, 69 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-09-01 13:04:32,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 76 transitions, 342 flow [2023-09-01 13:04:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:04:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:04:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1544 transitions. [2023-09-01 13:04:32,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146198830409356 [2023-09-01 13:04:32,592 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1544 transitions. [2023-09-01 13:04:32,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1544 transitions. [2023-09-01 13:04:32,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:32,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1544 transitions. [2023-09-01 13:04:32,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:32,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:32,605 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:32,605 INFO L175 Difference]: Start difference. First operand has 38 places, 43 transitions, 112 flow. Second operand 5 states and 1544 transitions. [2023-09-01 13:04:32,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 76 transitions, 342 flow [2023-09-01 13:04:32,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:04:32,609 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 132 flow [2023-09-01 13:04:32,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-09-01 13:04:32,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-09-01 13:04:32,610 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 132 flow [2023-09-01 13:04:32,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:32,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:32,612 INFO L208 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] [2023-09-01 13:04:32,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:04:32,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:32,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1862203380, now seen corresponding path program 1 times [2023-09-01 13:04:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:32,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562487751] [2023-09-01 13:04:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:32,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562487751] [2023-09-01 13:04:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562487751] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:32,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:32,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:04:32,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294610178] [2023-09-01 13:04:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:32,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:04:32,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:32,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:04:32,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:04:32,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 684 [2023-09-01 13:04:32,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 292.5) internal successors, (1170), 4 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:32,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:32,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 684 [2023-09-01 13:04:32,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:33,922 INFO L130 PetriNetUnfolder]: 6439/9045 cut-off events. [2023-09-01 13:04:33,924 INFO L131 PetriNetUnfolder]: For 2107/2107 co-relation queries the response was YES. [2023-09-01 13:04:33,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19723 conditions, 9045 events. 6439/9045 cut-off events. For 2107/2107 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51137 event pairs, 4038 based on Foata normal form. 396/7330 useless extension candidates. Maximal degree in co-relation 12639. Up to 4867 conditions per place. [2023-09-01 13:04:33,967 INFO L137 encePairwiseOnDemand]: 675/684 looper letters, 103 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2023-09-01 13:04:33,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 118 transitions, 556 flow [2023-09-01 13:04:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:04:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:04:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1542 transitions. [2023-09-01 13:04:33,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45087719298245615 [2023-09-01 13:04:33,971 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1542 transitions. [2023-09-01 13:04:33,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1542 transitions. [2023-09-01 13:04:33,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:33,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1542 transitions. [2023-09-01 13:04:33,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:33,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:33,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:33,983 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 132 flow. Second operand 5 states and 1542 transitions. [2023-09-01 13:04:33,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 118 transitions, 556 flow [2023-09-01 13:04:33,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 118 transitions, 550 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:04:33,986 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 221 flow [2023-09-01 13:04:33,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-09-01 13:04:33,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-09-01 13:04:33,988 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 221 flow [2023-09-01 13:04:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.5) internal successors, (1170), 4 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:33,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:33,989 INFO L208 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] [2023-09-01 13:04:33,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:04:33,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:33,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:33,990 INFO L85 PathProgramCache]: Analyzing trace with hash 495709722, now seen corresponding path program 1 times [2023-09-01 13:04:33,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:33,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130518445] [2023-09-01 13:04:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:04:34,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130518445] [2023-09-01 13:04:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130518445] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:34,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:34,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 13:04:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173282499] [2023-09-01 13:04:34,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:34,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:04:34,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:34,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:04:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:04:34,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 684 [2023-09-01 13:04:34,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 296.75) internal successors, (1187), 4 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:34,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:34,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 684 [2023-09-01 13:04:34,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:35,234 INFO L130 PetriNetUnfolder]: 7731/10993 cut-off events. [2023-09-01 13:04:35,234 INFO L131 PetriNetUnfolder]: For 3747/3747 co-relation queries the response was YES. [2023-09-01 13:04:35,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24850 conditions, 10993 events. 7731/10993 cut-off events. For 3747/3747 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 65257 event pairs, 4038 based on Foata normal form. 342/8907 useless extension candidates. Maximal degree in co-relation 15406. Up to 8436 conditions per place. [2023-09-01 13:04:35,286 INFO L137 encePairwiseOnDemand]: 681/684 looper letters, 51 selfloop transitions, 0 changer transitions 34/88 dead transitions. [2023-09-01 13:04:35,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 88 transitions, 501 flow [2023-09-01 13:04:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:04:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:04:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1231 transitions. [2023-09-01 13:04:35,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44992690058479534 [2023-09-01 13:04:35,293 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1231 transitions. [2023-09-01 13:04:35,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1231 transitions. [2023-09-01 13:04:35,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:35,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1231 transitions. [2023-09-01 13:04:35,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.75) internal successors, (1231), 4 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:35,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:35,305 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:35,305 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 221 flow. Second operand 4 states and 1231 transitions. [2023-09-01 13:04:35,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 88 transitions, 501 flow [2023-09-01 13:04:35,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 499 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 13:04:35,319 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 221 flow [2023-09-01 13:04:35,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-09-01 13:04:35,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-09-01 13:04:35,321 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 221 flow [2023-09-01 13:04:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 296.75) internal successors, (1187), 4 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:35,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:35,323 INFO L208 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] [2023-09-01 13:04:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:04:35,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:35,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1794749022, now seen corresponding path program 1 times [2023-09-01 13:04:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:35,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127466566] [2023-09-01 13:04:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:35,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:04:35,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127466566] [2023-09-01 13:04:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127466566] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:35,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:35,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:04:35,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971598664] [2023-09-01 13:04:35,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:04:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:04:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:04:35,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 684 [2023-09-01 13:04:35,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:35,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:35,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 684 [2023-09-01 13:04:35,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:36,701 INFO L130 PetriNetUnfolder]: 5945/8535 cut-off events. [2023-09-01 13:04:36,701 INFO L131 PetriNetUnfolder]: For 3368/3368 co-relation queries the response was YES. [2023-09-01 13:04:36,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20117 conditions, 8535 events. 5945/8535 cut-off events. For 3368/3368 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 49510 event pairs, 4038 based on Foata normal form. 4/6917 useless extension candidates. Maximal degree in co-relation 20105. Up to 8432 conditions per place. [2023-09-01 13:04:36,736 INFO L137 encePairwiseOnDemand]: 678/684 looper letters, 45 selfloop transitions, 4 changer transitions 16/68 dead transitions. [2023-09-01 13:04:36,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 433 flow [2023-09-01 13:04:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:04:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:04:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-09-01 13:04:36,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4334795321637427 [2023-09-01 13:04:36,740 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-09-01 13:04:36,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-09-01 13:04:36,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:36,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-09-01 13:04:36,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:36,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:36,750 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 684.0) internal successors, (3420), 5 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:36,750 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 221 flow. Second operand 4 states and 1186 transitions. [2023-09-01 13:04:36,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 433 flow [2023-09-01 13:04:36,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 429 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 13:04:36,766 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 218 flow [2023-09-01 13:04:36,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-09-01 13:04:36,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-09-01 13:04:36,767 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 218 flow [2023-09-01 13:04:36,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:36,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:36,768 INFO L208 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] [2023-09-01 13:04:36,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:04:36,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:36,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:36,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1786239941, now seen corresponding path program 1 times [2023-09-01 13:04:36,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:36,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040302179] [2023-09-01 13:04:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:36,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:04:36,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040302179] [2023-09-01 13:04:36,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040302179] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165614127] [2023-09-01 13:04:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:36,879 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) [2023-09-01 13:04:36,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:04:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 13:04:37,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:04:37,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 13:04:37,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165614127] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:37,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 13:04:37,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 13:04:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724604363] [2023-09-01 13:04:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:37,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:04:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:04:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-09-01 13:04:37,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 684 [2023-09-01 13:04:37,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:37,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:37,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 684 [2023-09-01 13:04:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:38,309 INFO L130 PetriNetUnfolder]: 7924/11566 cut-off events. [2023-09-01 13:04:38,310 INFO L131 PetriNetUnfolder]: For 4383/4383 co-relation queries the response was YES. [2023-09-01 13:04:38,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26335 conditions, 11566 events. 7924/11566 cut-off events. For 4383/4383 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 72409 event pairs, 4038 based on Foata normal form. 360/10081 useless extension candidates. Maximal degree in co-relation 26323. Up to 7896 conditions per place. [2023-09-01 13:04:38,347 INFO L137 encePairwiseOnDemand]: 680/684 looper letters, 48 selfloop transitions, 0 changer transitions 48/99 dead transitions. [2023-09-01 13:04:38,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 570 flow [2023-09-01 13:04:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:04:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:04:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1528 transitions. [2023-09-01 13:04:38,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44678362573099417 [2023-09-01 13:04:38,357 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1528 transitions. [2023-09-01 13:04:38,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1528 transitions. [2023-09-01 13:04:38,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:38,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1528 transitions. [2023-09-01 13:04:38,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.6) internal successors, (1528), 5 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:38,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:38,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:38,367 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 218 flow. Second operand 5 states and 1528 transitions. [2023-09-01 13:04:38,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 570 flow [2023-09-01 13:04:38,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 562 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 13:04:38,373 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 216 flow [2023-09-01 13:04:38,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-09-01 13:04:38,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-09-01 13:04:38,376 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 216 flow [2023-09-01 13:04:38,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:38,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:38,377 INFO L208 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] [2023-09-01 13:04:38,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 13:04:38,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:38,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1996153928, now seen corresponding path program 1 times [2023-09-01 13:04:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002150650] [2023-09-01 13:04:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:04:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002150650] [2023-09-01 13:04:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002150650] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521317640] [2023-09-01 13:04:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:38,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:38,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:38,729 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) [2023-09-01 13:04:38,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:04:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:38,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:04:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:04:38,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:04:38,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521317640] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:38,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:04:38,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-09-01 13:04:38,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119024918] [2023-09-01 13:04:38,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:38,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:04:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:04:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 13:04:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 684 [2023-09-01 13:04:39,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 282.2) internal successors, (1411), 5 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:39,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:39,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 684 [2023-09-01 13:04:39,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:39,813 INFO L130 PetriNetUnfolder]: 5396/7963 cut-off events. [2023-09-01 13:04:39,813 INFO L131 PetriNetUnfolder]: For 4493/4493 co-relation queries the response was YES. [2023-09-01 13:04:39,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19479 conditions, 7963 events. 5396/7963 cut-off events. For 4493/4493 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47738 event pairs, 1125 based on Foata normal form. 0/7223 useless extension candidates. Maximal degree in co-relation 19465. Up to 5461 conditions per place. [2023-09-01 13:04:39,849 INFO L137 encePairwiseOnDemand]: 678/684 looper letters, 59 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-09-01 13:04:39,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 408 flow [2023-09-01 13:04:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:04:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:04:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1437 transitions. [2023-09-01 13:04:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201754385964912 [2023-09-01 13:04:39,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1437 transitions. [2023-09-01 13:04:39,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1437 transitions. [2023-09-01 13:04:39,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:39,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1437 transitions. [2023-09-01 13:04:39,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 287.4) internal successors, (1437), 5 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:39,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:39,864 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 684.0) internal successors, (4104), 6 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:39,864 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 216 flow. Second operand 5 states and 1437 transitions. [2023-09-01 13:04:39,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 408 flow [2023-09-01 13:04:39,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 390 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 13:04:39,877 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 233 flow [2023-09-01 13:04:39,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-09-01 13:04:39,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-09-01 13:04:39,878 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 233 flow [2023-09-01 13:04:39,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.2) internal successors, (1411), 5 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:39,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:39,879 INFO L208 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] [2023-09-01 13:04:39,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:40,086 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,SelfDestructingSolverStorable6 [2023-09-01 13:04:40,086 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:40,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1329329946, now seen corresponding path program 1 times [2023-09-01 13:04:40,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:40,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42243813] [2023-09-01 13:04:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:04:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:40,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42243813] [2023-09-01 13:04:40,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42243813] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:04:40,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:04:40,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 13:04:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795905610] [2023-09-01 13:04:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:40,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:04:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:04:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:04:40,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 684 [2023-09-01 13:04:40,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 233 flow. Second operand has 7 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:40,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:40,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 684 [2023-09-01 13:04:40,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:41,675 INFO L130 PetriNetUnfolder]: 6057/9079 cut-off events. [2023-09-01 13:04:41,675 INFO L131 PetriNetUnfolder]: For 5733/5733 co-relation queries the response was YES. [2023-09-01 13:04:41,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22848 conditions, 9079 events. 6057/9079 cut-off events. For 5733/5733 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 55278 event pairs, 4110 based on Foata normal form. 159/8594 useless extension candidates. Maximal degree in co-relation 22834. Up to 6172 conditions per place. [2023-09-01 13:04:41,716 INFO L137 encePairwiseOnDemand]: 674/684 looper letters, 83 selfloop transitions, 9 changer transitions 56/150 dead transitions. [2023-09-01 13:04:41,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 150 transitions, 797 flow [2023-09-01 13:04:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 13:04:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 13:04:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2869 transitions. [2023-09-01 13:04:41,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2023-09-01 13:04:41,724 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2869 transitions. [2023-09-01 13:04:41,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2869 transitions. [2023-09-01 13:04:41,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:41,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2869 transitions. [2023-09-01 13:04:41,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 286.9) internal successors, (2869), 10 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:41,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 684.0) internal successors, (7524), 11 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:41,743 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 684.0) internal successors, (7524), 11 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:41,743 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 233 flow. Second operand 10 states and 2869 transitions. [2023-09-01 13:04:41,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 150 transitions, 797 flow [2023-09-01 13:04:41,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 150 transitions, 786 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 13:04:41,758 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 292 flow [2023-09-01 13:04:41,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=292, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-09-01 13:04:41,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2023-09-01 13:04:41,760 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 292 flow [2023-09-01 13:04:41,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:41,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:41,767 INFO L208 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] [2023-09-01 13:04:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 13:04:41,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:41,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash 284319270, now seen corresponding path program 2 times [2023-09-01 13:04:41,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:41,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585479638] [2023-09-01 13:04:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:04:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585479638] [2023-09-01 13:04:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585479638] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408675889] [2023-09-01 13:04:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:04:41,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:41,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:41,945 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) [2023-09-01 13:04:41,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:04:42,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:04:42,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:04:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:04:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:04:42,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:04:42,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408675889] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:42,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:04:42,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-09-01 13:04:42,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982588228] [2023-09-01 13:04:42,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:04:42,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:04:42,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:04:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:04:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:04:42,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 684 [2023-09-01 13:04:42,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 275.0) internal successors, (1925), 7 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:42,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:04:42,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 684 [2023-09-01 13:04:42,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:04:43,528 INFO L130 PetriNetUnfolder]: 5873/8812 cut-off events. [2023-09-01 13:04:43,529 INFO L131 PetriNetUnfolder]: For 12300/13004 co-relation queries the response was YES. [2023-09-01 13:04:43,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26233 conditions, 8812 events. 5873/8812 cut-off events. For 12300/13004 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 51024 event pairs, 677 based on Foata normal form. 1584/9854 useless extension candidates. Maximal degree in co-relation 26213. Up to 4204 conditions per place. [2023-09-01 13:04:43,562 INFO L137 encePairwiseOnDemand]: 675/684 looper letters, 89 selfloop transitions, 17 changer transitions 17/124 dead transitions. [2023-09-01 13:04:43,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 124 transitions, 860 flow [2023-09-01 13:04:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 13:04:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 13:04:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2261 transitions. [2023-09-01 13:04:43,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131944444444444 [2023-09-01 13:04:43,569 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2261 transitions. [2023-09-01 13:04:43,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2261 transitions. [2023-09-01 13:04:43,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:43,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2261 transitions. [2023-09-01 13:04:43,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 282.625) internal successors, (2261), 8 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:43,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 684.0) internal successors, (6156), 9 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:43,584 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 684.0) internal successors, (6156), 9 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:43,584 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 292 flow. Second operand 8 states and 2261 transitions. [2023-09-01 13:04:43,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 124 transitions, 860 flow [2023-09-01 13:04:43,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 835 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-09-01 13:04:43,599 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 324 flow [2023-09-01 13:04:43,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=684, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2023-09-01 13:04:43,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2023-09-01 13:04:43,600 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 324 flow [2023-09-01 13:04:43,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 275.0) internal successors, (1925), 7 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:43,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:43,601 INFO L208 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] [2023-09-01 13:04:43,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:43,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:43,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:04:43,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1369385218, now seen corresponding path program 1 times [2023-09-01 13:04:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:43,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702219636] [2023-09-01 13:04:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:43,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:04:45,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702219636] [2023-09-01 13:04:45,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702219636] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466775170] [2023-09-01 13:04:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:45,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:45,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:45,873 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) [2023-09-01 13:04:45,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:04:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 92 conjunts are in the unsatisfiable core [2023-09-01 13:04:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,132 INFO L321 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2023-09-01 13:04:46,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 21 [2023-09-01 13:04:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,242 INFO L321 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2023-09-01 13:04:46,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 38 [2023-09-01 13:04:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,369 INFO L321 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2023-09-01 13:04:46,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 26 treesize of output 32 [2023-09-01 13:04:46,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2023-09-01 13:04:46,655 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:04:46,823 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:04:46,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-09-01 13:04:46,904 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:04:46,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:04:46,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-09-01 13:04:47,508 INFO L321 Elim1Store]: treesize reduction 153, result has 30.8 percent of original size [2023-09-01 13:04:47,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 191 treesize of output 150 [2023-09-01 13:04:47,531 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:04:47,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 116 [2023-09-01 13:04:47,545 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:04:47,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 84 [2023-09-01 13:04:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:04:47,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:47,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:04:47,726 INFO L350 Elim1Store]: Elim1 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 103 treesize of output 96 Killed by 15