./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-ring.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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:16:36,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:16:36,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:16:36,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:16:36,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:16:36,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:16:36,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:16:36,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:16:36,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:16:36,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:16:36,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:16:36,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:16:36,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:16:36,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:16:36,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:16:36,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:16:36,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:16:36,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:16:36,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:16:36,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:16:36,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:16:36,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:16:36,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:16:36,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:16:36,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:16:36,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:16:36,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:16:36,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:16:36,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:16:36,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:16:36,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:16:36,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:16:36,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:16:36,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:16:36,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:16:36,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:16:36,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:16:36,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:16:36,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:16:36,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:16:36,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:16:36,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:16:36,257 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:16:36,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:16:36,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:16:36,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:16:36,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:16:36,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:16:36,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:16:36,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:16:36,260 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:16:36,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:16:36,261 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:16:36,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:16:36,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:16:36,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:16:36,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:16:36,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:16:36,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:16:36,263 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:16:36,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:16:36,263 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:16:36,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:16:36,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:16:36,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:16:36,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:16:36,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:16:36,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:16:36,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:16:36,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:16:36,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:16:36,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:16:36,265 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:16:36,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:16:36,266 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:16:36,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:16:36,266 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:16:36,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:16:36,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:16:36,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:16:36,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:16:36,613 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:16:36,613 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:16:36,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-31 02:16:37,800 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:16:38,023 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:16:38,024 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-08-31 02:16:38,035 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4058bb5af/c5a8d1ac57c8405596ea8d4fa375826d/FLAGff7b2ff6a [2023-08-31 02:16:38,062 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4058bb5af/c5a8d1ac57c8405596ea8d4fa375826d [2023-08-31 02:16:38,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:16:38,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:16:38,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:16:38,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:16:38,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:16:38,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e26daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38, skipping insertion in model container [2023-08-31 02:16:38,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:16:38,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:16:38,311 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-ring.wvr.c[3947,3960] [2023-08-31 02:16:38,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:16:38,336 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:16:38,365 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-ring.wvr.c[3947,3960] [2023-08-31 02:16:38,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:16:38,386 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:16:38,387 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:16:38,394 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:16:38,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38 WrapperNode [2023-08-31 02:16:38,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:16:38,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:16:38,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:16:38,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:16:38,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,455 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 325 [2023-08-31 02:16:38,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:16:38,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:16:38,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:16:38,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:16:38,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,495 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:16:38,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:16:38,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:16:38,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:16:38,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (1/1) ... [2023-08-31 02:16:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:16:38,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:16:38,533 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) [2023-08-31 02:16:38,549 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 [2023-08-31 02:16:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:16:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:16:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:16:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:16:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:16:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:16:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:16:38,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:16:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 02:16:38,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 02:16:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:16:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:16:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:16:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:16:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:16:38,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:16:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:16:38,576 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:16:38,732 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:16:38,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:16:39,179 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:16:39,363 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:16:39,363 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-31 02:16:39,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:16:39 BoogieIcfgContainer [2023-08-31 02:16:39,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:16:39,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:16:39,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:16:39,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:16:39,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:16:38" (1/3) ... [2023-08-31 02:16:39,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f87be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:16:39, skipping insertion in model container [2023-08-31 02:16:39,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:16:38" (2/3) ... [2023-08-31 02:16:39,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f87be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:16:39, skipping insertion in model container [2023-08-31 02:16:39,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:16:39" (3/3) ... [2023-08-31 02:16:39,374 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-08-31 02:16:39,382 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:16:39,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:16:39,390 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:16:39,391 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:16:39,477 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 02:16:39,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 255 transitions, 534 flow [2023-08-31 02:16:39,608 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2023-08-31 02:16:39,608 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:16:39,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 252 events. 22/252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-08-31 02:16:39,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 255 transitions, 534 flow [2023-08-31 02:16:39,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 242 transitions, 502 flow [2023-08-31 02:16:39,622 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:16:39,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 242 transitions, 502 flow [2023-08-31 02:16:39,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 242 transitions, 502 flow [2023-08-31 02:16:39,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 242 transitions, 502 flow [2023-08-31 02:16:39,673 INFO L130 PetriNetUnfolder]: 22/242 cut-off events. [2023-08-31 02:16:39,674 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:16:39,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 22/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-08-31 02:16:39,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 1962 [2023-08-31 02:16:48,060 INFO L134 LiptonReduction]: Checked pairs total: 3161 [2023-08-31 02:16:48,060 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-31 02:16:48,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:16:48,078 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;@16f9fc27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:16:48,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 02:16:48,086 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2023-08-31 02:16:48,086 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 02:16:48,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:48,087 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] [2023-08-31 02:16:48,088 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)] === [2023-08-31 02:16:48,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1137441367, now seen corresponding path program 1 times [2023-08-31 02:16:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:48,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296171753] [2023-08-31 02:16:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:48,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:16:48,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:48,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296171753] [2023-08-31 02:16:48,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296171753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:16:48,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:16:48,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 02:16:48,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852366765] [2023-08-31 02:16:48,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:16:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 02:16:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 02:16:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 02:16:48,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 507 [2023-08-31 02:16:48,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:48,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:48,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 507 [2023-08-31 02:16:48,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:48,647 INFO L130 PetriNetUnfolder]: 468/682 cut-off events. [2023-08-31 02:16:48,647 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-08-31 02:16:48,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 682 events. 468/682 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2010 event pairs, 333 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 1160. Up to 683 conditions per place. [2023-08-31 02:16:48,657 INFO L137 encePairwiseOnDemand]: 505/507 looper letters, 31 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-08-31 02:16:48,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 142 flow [2023-08-31 02:16:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 02:16:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 02:16:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 483 transitions. [2023-08-31 02:16:48,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47633136094674555 [2023-08-31 02:16:48,678 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 483 transitions. [2023-08-31 02:16:48,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 483 transitions. [2023-08-31 02:16:48,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:48,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 483 transitions. [2023-08-31 02:16:48,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 241.5) internal successors, (483), 2 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:48,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:48,694 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:48,696 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 2 states and 483 transitions. [2023-08-31 02:16:48,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 142 flow [2023-08-31 02:16:48,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 02:16:48,702 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 68 flow [2023-08-31 02:16:48,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2023-08-31 02:16:48,708 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2023-08-31 02:16:48,709 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 68 flow [2023-08-31 02:16:48,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:48,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:48,713 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] [2023-08-31 02:16:48,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:16:48,714 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)] === [2023-08-31 02:16:48,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash -341274689, now seen corresponding path program 1 times [2023-08-31 02:16:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365416662] [2023-08-31 02:16:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:16:49,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:49,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365416662] [2023-08-31 02:16:49,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365416662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:16:49,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:16:49,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:16:49,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107766563] [2023-08-31 02:16:49,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:16:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:16:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:16:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:16:49,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-08-31 02:16:49,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:49,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-08-31 02:16:49,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:49,309 INFO L130 PetriNetUnfolder]: 529/791 cut-off events. [2023-08-31 02:16:49,309 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 02:16:49,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 791 events. 529/791 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2481 event pairs, 384 based on Foata normal form. 42/687 useless extension candidates. Maximal degree in co-relation 1610. Up to 683 conditions per place. [2023-08-31 02:16:49,313 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 30 selfloop transitions, 2 changer transitions 17/49 dead transitions. [2023-08-31 02:16:49,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 205 flow [2023-08-31 02:16:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:16:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:16:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 896 transitions. [2023-08-31 02:16:49,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418145956607495 [2023-08-31 02:16:49,316 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 896 transitions. [2023-08-31 02:16:49,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 896 transitions. [2023-08-31 02:16:49,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:49,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 896 transitions. [2023-08-31 02:16:49,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,324 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,324 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 68 flow. Second operand 4 states and 896 transitions. [2023-08-31 02:16:49,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 205 flow [2023-08-31 02:16:49,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 02:16:49,326 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2023-08-31 02:16:49,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-31 02:16:49,327 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-31 02:16:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2023-08-31 02:16:49,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:49,328 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] [2023-08-31 02:16:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:16:49,328 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)] === [2023-08-31 02:16:49,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1803368648, now seen corresponding path program 1 times [2023-08-31 02:16:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:49,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020605857] [2023-08-31 02:16:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:16:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020605857] [2023-08-31 02:16:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020605857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:16:49,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:16:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:16:49,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232757380] [2023-08-31 02:16:49,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:16:49,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:16:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:49,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:16:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:16:49,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-08-31 02:16:49,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:49,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-08-31 02:16:49,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:49,805 INFO L130 PetriNetUnfolder]: 755/1159 cut-off events. [2023-08-31 02:16:49,806 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-31 02:16:49,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1159 events. 755/1159 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4347 event pairs, 579 based on Foata normal form. 116/1097 useless extension candidates. Maximal degree in co-relation 2646. Up to 684 conditions per place. [2023-08-31 02:16:49,810 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 31 selfloop transitions, 2 changer transitions 35/68 dead transitions. [2023-08-31 02:16:49,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 68 transitions, 314 flow [2023-08-31 02:16:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:16:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:16:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2023-08-31 02:16:49,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44497041420118344 [2023-08-31 02:16:49,814 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2023-08-31 02:16:49,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2023-08-31 02:16:49,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:49,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2023-08-31 02:16:49,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,824 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 5 states and 1128 transitions. [2023-08-31 02:16:49,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 68 transitions, 314 flow [2023-08-31 02:16:49,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 68 transitions, 310 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:16:49,826 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 108 flow [2023-08-31 02:16:49,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-31 02:16:49,827 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-31 02:16:49,828 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 108 flow [2023-08-31 02:16:49,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:49,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:49,829 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] [2023-08-31 02:16:49,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:16:49,829 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)] === [2023-08-31 02:16:49,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1356236085, now seen corresponding path program 1 times [2023-08-31 02:16:49,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:49,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173167236] [2023-08-31 02:16:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:49,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:49,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:49,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173167236] [2023-08-31 02:16:49,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173167236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:16:49,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:16:49,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 02:16:49,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937793914] [2023-08-31 02:16:49,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:16:49,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:16:49,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:16:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 02:16:49,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 507 [2023-08-31 02:16:50,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:50,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 507 [2023-08-31 02:16:50,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:50,205 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-08-31 02:16:50,205 INFO L131 PetriNetUnfolder]: For 431/431 co-relation queries the response was YES. [2023-08-31 02:16:50,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 1143 events. 759/1143 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4122 event pairs, 586 based on Foata normal form. 76/1014 useless extension candidates. Maximal degree in co-relation 3088. Up to 685 conditions per place. [2023-08-31 02:16:50,210 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 32 selfloop transitions, 2 changer transitions 20/54 dead transitions. [2023-08-31 02:16:50,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 283 flow [2023-08-31 02:16:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:16:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:16:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 899 transitions. [2023-08-31 02:16:50,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432938856015779 [2023-08-31 02:16:50,213 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 899 transitions. [2023-08-31 02:16:50,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 899 transitions. [2023-08-31 02:16:50,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:50,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 899 transitions. [2023-08-31 02:16:50,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.75) internal successors, (899), 4 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,221 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,221 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 108 flow. Second operand 4 states and 899 transitions. [2023-08-31 02:16:50,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 283 flow [2023-08-31 02:16:50,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 263 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-31 02:16:50,224 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 114 flow [2023-08-31 02:16:50,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-31 02:16:50,225 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2023-08-31 02:16:50,225 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 114 flow [2023-08-31 02:16:50,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:50,226 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] [2023-08-31 02:16:50,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:16:50,227 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)] === [2023-08-31 02:16:50,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2052825742, now seen corresponding path program 1 times [2023-08-31 02:16:50,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:50,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542929222] [2023-08-31 02:16:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:16:50,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:50,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542929222] [2023-08-31 02:16:50,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542929222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:16:50,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:16:50,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 02:16:50,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426095992] [2023-08-31 02:16:50,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:16:50,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:16:50,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:50,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:16:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:16:50,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 507 [2023-08-31 02:16:50,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:50,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 507 [2023-08-31 02:16:50,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:50,569 INFO L130 PetriNetUnfolder]: 834/1218 cut-off events. [2023-08-31 02:16:50,570 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-08-31 02:16:50,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 1218 events. 834/1218 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4372 event pairs, 333 based on Foata normal form. 1/972 useless extension candidates. Maximal degree in co-relation 3221. Up to 642 conditions per place. [2023-08-31 02:16:50,575 INFO L137 encePairwiseOnDemand]: 504/507 looper letters, 47 selfloop transitions, 2 changer transitions 6/55 dead transitions. [2023-08-31 02:16:50,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 289 flow [2023-08-31 02:16:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:16:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:16:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-08-31 02:16:50,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472715318869165 [2023-08-31 02:16:50,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-08-31 02:16:50,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-08-31 02:16:50,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:50,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-08-31 02:16:50,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,584 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 114 flow. Second operand 3 states and 719 transitions. [2023-08-31 02:16:50,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 289 flow [2023-08-31 02:16:50,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 02:16:50,587 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 124 flow [2023-08-31 02:16:50,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-31 02:16:50,588 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-08-31 02:16:50,588 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 124 flow [2023-08-31 02:16:50,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:50,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:50,589 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] [2023-08-31 02:16:50,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:16:50,589 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)] === [2023-08-31 02:16:50,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:50,590 INFO L85 PathProgramCache]: Analyzing trace with hash 402993380, now seen corresponding path program 1 times [2023-08-31 02:16:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005156455] [2023-08-31 02:16:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:50,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005156455] [2023-08-31 02:16:50,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005156455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:16:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304823497] [2023-08-31 02:16:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:50,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:16:50,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:16:50,801 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) [2023-08-31 02:16:50,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:16:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:50,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:16:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:16:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:51,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:16:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:51,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304823497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:16:51,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:16:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 02:16:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742406562] [2023-08-31 02:16:51,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:16:51,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:16:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:16:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:16:51,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-08-31 02:16:51,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 124 flow. Second operand has 11 states, 11 states have (on average 207.27272727272728) internal successors, (2280), 11 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:51,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:51,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-08-31 02:16:51,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:51,794 INFO L130 PetriNetUnfolder]: 1355/2016 cut-off events. [2023-08-31 02:16:51,794 INFO L131 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2023-08-31 02:16:51,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 2016 events. 1355/2016 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8244 event pairs, 714 based on Foata normal form. 72/1706 useless extension candidates. Maximal degree in co-relation 5505. Up to 1218 conditions per place. [2023-08-31 02:16:51,802 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 33 selfloop transitions, 3 changer transitions 42/78 dead transitions. [2023-08-31 02:16:51,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 419 flow [2023-08-31 02:16:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:16:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:16:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1293 transitions. [2023-08-31 02:16:51,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250493096646943 [2023-08-31 02:16:51,806 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1293 transitions. [2023-08-31 02:16:51,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1293 transitions. [2023-08-31 02:16:51,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:51,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1293 transitions. [2023-08-31 02:16:51,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 215.5) internal successors, (1293), 6 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:51,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:51,814 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:51,815 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 124 flow. Second operand 6 states and 1293 transitions. [2023-08-31 02:16:51,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 419 flow [2023-08-31 02:16:51,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:16:51,818 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 148 flow [2023-08-31 02:16:51,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-08-31 02:16:51,819 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-08-31 02:16:51,819 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 148 flow [2023-08-31 02:16:51,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.27272727272728) internal successors, (2280), 11 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:51,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:51,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:16:51,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 02:16:52,027 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 [2023-08-31 02:16:52,028 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)] === [2023-08-31 02:16:52,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1520183157, now seen corresponding path program 2 times [2023-08-31 02:16:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801495242] [2023-08-31 02:16:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:52,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:16:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801495242] [2023-08-31 02:16:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801495242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:16:52,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:16:52,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:16:52,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094124967] [2023-08-31 02:16:52,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:16:52,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:16:52,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:16:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:16:52,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-31 02:16:52,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:52,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:52,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-31 02:16:52,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:52,467 INFO L130 PetriNetUnfolder]: 906/1311 cut-off events. [2023-08-31 02:16:52,468 INFO L131 PetriNetUnfolder]: For 950/950 co-relation queries the response was YES. [2023-08-31 02:16:52,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 1311 events. 906/1311 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4447 event pairs, 287 based on Foata normal form. 34/1052 useless extension candidates. Maximal degree in co-relation 3971. Up to 844 conditions per place. [2023-08-31 02:16:52,488 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 43 selfloop transitions, 3 changer transitions 5/51 dead transitions. [2023-08-31 02:16:52,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 308 flow [2023-08-31 02:16:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:16:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:16:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-08-31 02:16:52,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46679815910585143 [2023-08-31 02:16:52,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-08-31 02:16:52,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-08-31 02:16:52,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:52,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-08-31 02:16:52,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:52,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:52,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:52,496 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 148 flow. Second operand 3 states and 710 transitions. [2023-08-31 02:16:52,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 308 flow [2023-08-31 02:16:52,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 280 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-31 02:16:52,500 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 153 flow [2023-08-31 02:16:52,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-31 02:16:52,501 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-31 02:16:52,501 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 153 flow [2023-08-31 02:16:52,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:52,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:52,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:16:52,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 02:16:52,502 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)] === [2023-08-31 02:16:52,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash -821181061, now seen corresponding path program 3 times [2023-08-31 02:16:52,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:52,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754942984] [2023-08-31 02:16:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:53,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754942984] [2023-08-31 02:16:53,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754942984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:16:53,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579362327] [2023-08-31 02:16:53,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:16:53,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:16:53,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:16:53,220 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) [2023-08-31 02:16:53,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:16:53,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:16:53,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:16:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:16:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:16:53,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 838 treesize of output 822 [2023-08-31 02:16:53,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:16:53,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 02:16:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:16:53,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:16:53,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579362327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:16:53,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:16:53,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2023-08-31 02:16:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232628552] [2023-08-31 02:16:53,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:16:53,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:16:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:16:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:16:53,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 507 [2023-08-31 02:16:53,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:53,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:53,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 507 [2023-08-31 02:16:53,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:54,036 INFO L130 PetriNetUnfolder]: 1046/1548 cut-off events. [2023-08-31 02:16:54,037 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-08-31 02:16:54,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4682 conditions, 1548 events. 1046/1548 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5963 event pairs, 300 based on Foata normal form. 28/1283 useless extension candidates. Maximal degree in co-relation 4669. Up to 901 conditions per place. [2023-08-31 02:16:54,046 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 80 selfloop transitions, 6 changer transitions 2/88 dead transitions. [2023-08-31 02:16:54,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 534 flow [2023-08-31 02:16:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:16:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:16:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1489 transitions. [2023-08-31 02:16:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195548041701888 [2023-08-31 02:16:54,050 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1489 transitions. [2023-08-31 02:16:54,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1489 transitions. [2023-08-31 02:16:54,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:54,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1489 transitions. [2023-08-31 02:16:54,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 212.71428571428572) internal successors, (1489), 7 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:54,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:54,060 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:54,060 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 153 flow. Second operand 7 states and 1489 transitions. [2023-08-31 02:16:54,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 534 flow [2023-08-31 02:16:54,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 509 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 02:16:54,063 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 189 flow [2023-08-31 02:16:54,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=189, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-31 02:16:54,064 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-08-31 02:16:54,064 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 189 flow [2023-08-31 02:16:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:54,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:54,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:16:54,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:16:54,275 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,SelfDestructingSolverStorable7 [2023-08-31 02:16:54,275 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)] === [2023-08-31 02:16:54,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:16:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2136771815, now seen corresponding path program 4 times [2023-08-31 02:16:54,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:16:54,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92163394] [2023-08-31 02:16:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:16:54,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:16:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:16:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:55,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:16:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92163394] [2023-08-31 02:16:55,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92163394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:16:55,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577871880] [2023-08-31 02:16:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:16:55,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:16:55,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:16:55,029 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) [2023-08-31 02:16:55,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:16:55,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:16:55,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:16:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-31 02:16:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:16:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:16:55,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:16:55,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:16:55,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:16:55,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-08-31 02:16:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:55,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:16:55,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:16:55,796 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 157 treesize of output 141 [2023-08-31 02:16:55,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-31 02:16:55,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-08-31 02:16:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:16:56,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577871880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:16:56,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:16:56,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-08-31 02:16:56,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386388553] [2023-08-31 02:16:56,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:16:56,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:16:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:16:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:16:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=744, Unknown=2, NotChecked=0, Total=870 [2023-08-31 02:16:57,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 507 [2023-08-31 02:16:57,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 189 flow. Second operand has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:57,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:16:57,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 507 [2023-08-31 02:16:57,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:16:59,810 INFO L130 PetriNetUnfolder]: 3012/4487 cut-off events. [2023-08-31 02:16:59,810 INFO L131 PetriNetUnfolder]: For 4802/4802 co-relation queries the response was YES. [2023-08-31 02:16:59,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14807 conditions, 4487 events. 3012/4487 cut-off events. For 4802/4802 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21533 event pairs, 762 based on Foata normal form. 198/4072 useless extension candidates. Maximal degree in co-relation 14791. Up to 1109 conditions per place. [2023-08-31 02:16:59,840 INFO L137 encePairwiseOnDemand]: 499/507 looper letters, 202 selfloop transitions, 29 changer transitions 24/255 dead transitions. [2023-08-31 02:16:59,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 255 transitions, 1633 flow [2023-08-31 02:16:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 02:16:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 02:16:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3988 transitions. [2023-08-31 02:16:59,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575398960014345 [2023-08-31 02:16:59,851 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3988 transitions. [2023-08-31 02:16:59,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3988 transitions. [2023-08-31 02:16:59,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:16:59,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3988 transitions. [2023-08-31 02:16:59,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 181.27272727272728) internal successors, (3988), 22 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:59,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:59,880 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:59,881 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 189 flow. Second operand 22 states and 3988 transitions. [2023-08-31 02:16:59,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 255 transitions, 1633 flow [2023-08-31 02:16:59,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 255 transitions, 1612 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-31 02:16:59,893 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 498 flow [2023-08-31 02:16:59,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=498, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-08-31 02:16:59,894 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2023-08-31 02:16:59,894 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 498 flow [2023-08-31 02:16:59,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:16:59,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:16:59,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:16:59,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:17:00,103 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 [2023-08-31 02:17:00,104 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)] === [2023-08-31 02:17:00,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:17:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1230266139, now seen corresponding path program 5 times [2023-08-31 02:17:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:17:00,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700797983] [2023-08-31 02:17:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:17:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:17:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:17:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:17:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:17:00,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700797983] [2023-08-31 02:17:00,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700797983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:17:00,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:17:00,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 02:17:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683458323] [2023-08-31 02:17:00,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:17:00,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:17:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:17:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:17:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:17:00,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 507 [2023-08-31 02:17:00,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:00,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:17:00,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 507 [2023-08-31 02:17:00,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:17:00,616 INFO L130 PetriNetUnfolder]: 1118/1789 cut-off events. [2023-08-31 02:17:00,616 INFO L131 PetriNetUnfolder]: For 6358/6358 co-relation queries the response was YES. [2023-08-31 02:17:00,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7589 conditions, 1789 events. 1118/1789 cut-off events. For 6358/6358 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7126 event pairs, 405 based on Foata normal form. 60/1658 useless extension candidates. Maximal degree in co-relation 7563. Up to 1363 conditions per place. [2023-08-31 02:17:00,638 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 68 selfloop transitions, 4 changer transitions 1/73 dead transitions. [2023-08-31 02:17:00,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 665 flow [2023-08-31 02:17:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:17:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:17:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2023-08-31 02:17:00,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45825115055884286 [2023-08-31 02:17:00,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2023-08-31 02:17:00,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2023-08-31 02:17:00,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:17:00,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2023-08-31 02:17:00,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:00,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:00,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:00,646 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 498 flow. Second operand 3 states and 697 transitions. [2023-08-31 02:17:00,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 665 flow [2023-08-31 02:17:00,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 546 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-31 02:17:00,670 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 401 flow [2023-08-31 02:17:00,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2023-08-31 02:17:00,673 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2023-08-31 02:17:00,673 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 401 flow [2023-08-31 02:17:00,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:00,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:17:00,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:17:00,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 02:17:00,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:17:00,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:17:00,674 INFO L85 PathProgramCache]: Analyzing trace with hash 118049101, now seen corresponding path program 1 times [2023-08-31 02:17:00,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:17:00,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263722614] [2023-08-31 02:17:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:17:00,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:17:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:17:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:17:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:17:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263722614] [2023-08-31 02:17:00,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263722614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:17:00,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556129521] [2023-08-31 02:17:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:17:00,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:17:00,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:17:00,826 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) [2023-08-31 02:17:00,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:17:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:17:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:17:00,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:17:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:17:01,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:17:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:17:01,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556129521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:17:01,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:17:01,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-31 02:17:01,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973300134] [2023-08-31 02:17:01,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:17:01,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:17:01,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:17:01,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:17:01,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:17:01,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-08-31 02:17:01,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 401 flow. Second operand has 11 states, 11 states have (on average 207.0) internal successors, (2277), 11 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:01,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:17:01,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-08-31 02:17:01,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:17:01,850 INFO L130 PetriNetUnfolder]: 1919/3133 cut-off events. [2023-08-31 02:17:01,850 INFO L131 PetriNetUnfolder]: For 8872/8872 co-relation queries the response was YES. [2023-08-31 02:17:01,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12186 conditions, 3133 events. 1919/3133 cut-off events. For 8872/8872 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14911 event pairs, 935 based on Foata normal form. 176/2969 useless extension candidates. Maximal degree in co-relation 12164. Up to 1742 conditions per place. [2023-08-31 02:17:01,868 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 95 selfloop transitions, 9 changer transitions 17/121 dead transitions. [2023-08-31 02:17:01,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 947 flow [2023-08-31 02:17:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:17:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:17:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-08-31 02:17:01,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227481919789612 [2023-08-31 02:17:01,872 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-08-31 02:17:01,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-08-31 02:17:01,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:17:01,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-08-31 02:17:01,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:01,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:01,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:01,880 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 401 flow. Second operand 6 states and 1286 transitions. [2023-08-31 02:17:01,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 947 flow [2023-08-31 02:17:01,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 121 transitions, 916 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-31 02:17:01,894 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 447 flow [2023-08-31 02:17:01,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=447, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-08-31 02:17:01,895 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2023-08-31 02:17:01,895 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 447 flow [2023-08-31 02:17:01,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.0) internal successors, (2277), 11 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:01,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:17:01,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:17:01,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 02:17:02,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:17:02,102 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:17:02,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:17:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1946385854, now seen corresponding path program 2 times [2023-08-31 02:17:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:17:02,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139298850] [2023-08-31 02:17:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:17:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:17:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:17:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:17:03,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:17:03,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139298850] [2023-08-31 02:17:03,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139298850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:17:03,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572349758] [2023-08-31 02:17:03,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:17:03,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:17:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:17:03,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:17:03,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:17:03,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:17:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:17:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 02:17:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:17:04,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:17:04,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:17:04,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:17:04,477 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 44 treesize of output 31 [2023-08-31 02:17:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:17:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:17:05,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:17:05,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 190 [2023-08-31 02:17:05,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:17:05,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 97 [2023-08-31 02:17:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:17:06,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572349758] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:17:06,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:17:06,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 44 [2023-08-31 02:17:06,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025803586] [2023-08-31 02:17:06,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:17:06,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-31 02:17:06,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:17:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-31 02:17:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1712, Unknown=2, NotChecked=0, Total=1980 [2023-08-31 02:17:08,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 507 [2023-08-31 02:17:08,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 447 flow. Second operand has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:08,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:17:08,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 507 [2023-08-31 02:17:08,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:17:12,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:17:14,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:17:16,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:17:22,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:17:35,549 WARN L222 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 95 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:17:49,887 WARN L222 SmtUtils]: Spent 14.25s on a formula simplification. DAG size of input: 92 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:17:52,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:17:54,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:17:57,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:17:57,927 INFO L130 PetriNetUnfolder]: 2235/3813 cut-off events. [2023-08-31 02:17:57,927 INFO L131 PetriNetUnfolder]: For 10432/10432 co-relation queries the response was YES. [2023-08-31 02:17:57,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14406 conditions, 3813 events. 2235/3813 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 20304 event pairs, 532 based on Foata normal form. 64/3504 useless extension candidates. Maximal degree in co-relation 14382. Up to 794 conditions per place. [2023-08-31 02:17:57,955 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 329 selfloop transitions, 110 changer transitions 29/468 dead transitions. [2023-08-31 02:17:57,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 468 transitions, 3316 flow [2023-08-31 02:17:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-31 02:17:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-31 02:17:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8707 transitions. [2023-08-31 02:17:57,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30667089320935476 [2023-08-31 02:17:57,979 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8707 transitions. [2023-08-31 02:17:57,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8707 transitions. [2023-08-31 02:17:57,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:17:57,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8707 transitions. [2023-08-31 02:17:57,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 155.48214285714286) internal successors, (8707), 56 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:58,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 507.0) internal successors, (28899), 57 states have internal predecessors, (28899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:58,043 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 507.0) internal successors, (28899), 57 states have internal predecessors, (28899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:58,043 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 447 flow. Second operand 56 states and 8707 transitions. [2023-08-31 02:17:58,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 468 transitions, 3316 flow [2023-08-31 02:17:58,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 468 transitions, 3213 flow, removed 43 selfloop flow, removed 3 redundant places. [2023-08-31 02:17:58,073 INFO L231 Difference]: Finished difference. Result has 161 places, 182 transitions, 1680 flow [2023-08-31 02:17:58,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1680, PETRI_PLACES=161, PETRI_TRANSITIONS=182} [2023-08-31 02:17:58,076 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2023-08-31 02:17:58,077 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 182 transitions, 1680 flow [2023-08-31 02:17:58,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:17:58,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:17:58,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:17:58,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:17:58,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 02:17:58,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:17:58,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:17:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash -716681592, now seen corresponding path program 3 times [2023-08-31 02:17:58,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:17:58,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002257631] [2023-08-31 02:17:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:17:58,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:17:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:17:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:17:59,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:17:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002257631] [2023-08-31 02:17:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002257631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:17:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098065251] [2023-08-31 02:17:59,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:17:59,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:17:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:17:59,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:17:59,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:18:00,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:18:00,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:18:00,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 02:18:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:18:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:18:00,635 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-31 02:18:00,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2023-08-31 02:18:00,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2023-08-31 02:18:00,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 02:18:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:18:00,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:18:01,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:18:01,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 122 [2023-08-31 02:18:01,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-31 02:18:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:18:01,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098065251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:18:01,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:18:01,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2023-08-31 02:18:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813780313] [2023-08-31 02:18:01,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:18:01,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-31 02:18:01,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:18:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-31 02:18:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1468, Unknown=6, NotChecked=0, Total=1640 [2023-08-31 02:18:08,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:18:08,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 507 [2023-08-31 02:18:08,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 182 transitions, 1680 flow. Second operand has 41 states, 41 states have (on average 176.1951219512195) internal successors, (7224), 41 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:18:08,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:18:08,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 507 [2023-08-31 02:18:08,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:18:16,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:18:27,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:18:38,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 02:18:52,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:18:55,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:18:57,728 INFO L130 PetriNetUnfolder]: 19502/31150 cut-off events. [2023-08-31 02:18:57,729 INFO L131 PetriNetUnfolder]: For 224994/224994 co-relation queries the response was YES. [2023-08-31 02:18:57,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159664 conditions, 31150 events. 19502/31150 cut-off events. For 224994/224994 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 222128 event pairs, 2378 based on Foata normal form. 2498/32636 useless extension candidates. Maximal degree in co-relation 159614. Up to 7093 conditions per place. [2023-08-31 02:18:58,140 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1497 selfloop transitions, 943 changer transitions 279/2719 dead transitions. [2023-08-31 02:18:58,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 2719 transitions, 27403 flow [2023-08-31 02:18:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-08-31 02:18:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2023-08-31 02:18:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 39033 transitions. [2023-08-31 02:18:58,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597577835536139 [2023-08-31 02:18:58,204 INFO L72 ComplementDD]: Start complementDD. Operand 214 states and 39033 transitions. [2023-08-31 02:18:58,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 214 states and 39033 transitions. [2023-08-31 02:18:58,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:18:58,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 214 states and 39033 transitions. [2023-08-31 02:18:58,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 215 states, 214 states have (on average 182.39719626168224) internal successors, (39033), 214 states have internal predecessors, (39033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:18:58,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:18:58,423 INFO L81 ComplementDD]: Finished complementDD. Result has 215 states, 215 states have (on average 507.0) internal successors, (109005), 215 states have internal predecessors, (109005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:18:58,423 INFO L175 Difference]: Start difference. First operand has 161 places, 182 transitions, 1680 flow. Second operand 214 states and 39033 transitions. [2023-08-31 02:18:58,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 2719 transitions, 27403 flow [2023-08-31 02:19:00,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 2719 transitions, 24172 flow, removed 1564 selfloop flow, removed 8 redundant places. [2023-08-31 02:19:00,238 INFO L231 Difference]: Finished difference. Result has 486 places, 1159 transitions, 13643 flow [2023-08-31 02:19:00,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=214, PETRI_FLOW=13643, PETRI_PLACES=486, PETRI_TRANSITIONS=1159} [2023-08-31 02:19:00,240 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 451 predicate places. [2023-08-31 02:19:00,240 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1159 transitions, 13643 flow [2023-08-31 02:19:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 176.1951219512195) internal successors, (7224), 41 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:19:00,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:19:00,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:19:00,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 02:19:00,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:19:00,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:19:00,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:19:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646834, now seen corresponding path program 4 times [2023-08-31 02:19:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:19:00,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490879309] [2023-08-31 02:19:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:19:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:19:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:19:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:19:03,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:19:03,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490879309] [2023-08-31 02:19:03,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490879309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:19:03,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337833183] [2023-08-31 02:19:03,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:19:03,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:19:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:19:03,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:19:03,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:19:03,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:19:03,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:19:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-31 02:19:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:19:03,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:19:03,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:19:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:19:04,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:19:04,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:19:04,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-08-31 02:19:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:19:04,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:19:05,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:19:05,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 516 treesize of output 528 [2023-08-31 02:19:05,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:19:05,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 365 [2023-08-31 02:19:05,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:19:05,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 290 [2023-08-31 02:19:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:19:27,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337833183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:19:27,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:19:27,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 47 [2023-08-31 02:19:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149535849] [2023-08-31 02:19:27,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:19:27,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-31 02:19:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:19:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-31 02:19:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1998, Unknown=3, NotChecked=0, Total=2256 [2023-08-31 02:19:30,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-08-31 02:19:30,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1159 transitions, 13643 flow. Second operand has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:19:30,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:19:30,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-08-31 02:19:30,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:19:38,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:19:40,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:19:49,519 INFO L130 PetriNetUnfolder]: 15794/25606 cut-off events. [2023-08-31 02:19:49,519 INFO L131 PetriNetUnfolder]: For 3149236/3149236 co-relation queries the response was YES. [2023-08-31 02:19:50,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254618 conditions, 25606 events. 15794/25606 cut-off events. For 3149236/3149236 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 181056 event pairs, 4363 based on Foata normal form. 374/25084 useless extension candidates. Maximal degree in co-relation 254445. Up to 13661 conditions per place. [2023-08-31 02:19:50,481 INFO L137 encePairwiseOnDemand]: 492/507 looper letters, 838 selfloop transitions, 446 changer transitions 50/1334 dead transitions. [2023-08-31 02:19:50,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1334 transitions, 19044 flow [2023-08-31 02:19:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 02:19:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 02:19:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6090 transitions. [2023-08-31 02:19:50,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30029585798816566 [2023-08-31 02:19:50,492 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6090 transitions. [2023-08-31 02:19:50,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6090 transitions. [2023-08-31 02:19:50,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:19:50,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6090 transitions. [2023-08-31 02:19:50,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 152.25) internal successors, (6090), 40 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:19:50,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 507.0) internal successors, (20787), 41 states have internal predecessors, (20787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:19:50,524 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 507.0) internal successors, (20787), 41 states have internal predecessors, (20787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:19:50,524 INFO L175 Difference]: Start difference. First operand has 486 places, 1159 transitions, 13643 flow. Second operand 40 states and 6090 transitions. [2023-08-31 02:19:50,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1334 transitions, 19044 flow [2023-08-31 02:20:27,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1334 transitions, 16535 flow, removed 1120 selfloop flow, removed 60 redundant places. [2023-08-31 02:20:27,430 INFO L231 Difference]: Finished difference. Result has 461 places, 1027 transitions, 12290 flow [2023-08-31 02:20:27,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=9700, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=12290, PETRI_PLACES=461, PETRI_TRANSITIONS=1027} [2023-08-31 02:20:27,431 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 426 predicate places. [2023-08-31 02:20:27,431 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1027 transitions, 12290 flow [2023-08-31 02:20:27,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:20:27,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:20:27,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:20:27,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:20:27,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:20:27,639 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:20:27,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:20:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash -861947296, now seen corresponding path program 5 times [2023-08-31 02:20:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:20:27,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577599035] [2023-08-31 02:20:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:20:27,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:20:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:20:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:20:29,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:20:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577599035] [2023-08-31 02:20:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577599035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:20:29,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135926737] [2023-08-31 02:20:29,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:20:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:20:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:20:29,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:20:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:20:29,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:20:29,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:20:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 02:20:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:20:29,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:20:29,389 INFO L321 Elim1Store]: treesize reduction 63, result has 32.3 percent of original size [2023-08-31 02:20:29,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 35 [2023-08-31 02:20:29,546 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-31 02:20:29,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:20:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:20:29,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 02:20:30,110 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 02:20:30,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 42 [2023-08-31 02:20:30,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-08-31 02:20:30,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 02:20:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:20:30,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:20:30,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:20:30,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 262 treesize of output 298 [2023-08-31 02:20:30,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:20:30,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 111 [2023-08-31 02:20:30,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-31 02:20:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:20:33,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135926737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:20:33,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:20:33,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 45 [2023-08-31 02:20:33,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075227740] [2023-08-31 02:20:33,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:20:33,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-31 02:20:33,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:20:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-31 02:20:33,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1887, Unknown=4, NotChecked=0, Total=2070 [2023-08-31 02:20:37,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 507 [2023-08-31 02:20:37,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1027 transitions, 12290 flow. Second operand has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:20:37,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:20:37,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 507 [2023-08-31 02:20:37,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:20:53,317 WARN L222 SmtUtils]: Spent 13.37s on a formula simplification. DAG size of input: 102 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:20:58,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:21,958 WARN L222 SmtUtils]: Spent 20.49s on a formula simplification. DAG size of input: 112 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:21:25,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:27,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:36,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:41,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:44,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:46,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:48,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:50,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:52,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:54,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:56,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:21:58,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:22:00,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:22:04,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:22:06,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:22:08,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:22:11,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:22:18,918 INFO L130 PetriNetUnfolder]: 21872/35477 cut-off events. [2023-08-31 02:22:18,919 INFO L131 PetriNetUnfolder]: For 1731089/1731089 co-relation queries the response was YES. [2023-08-31 02:22:19,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295961 conditions, 35477 events. 21872/35477 cut-off events. For 1731089/1731089 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 264754 event pairs, 5984 based on Foata normal form. 98/34443 useless extension candidates. Maximal degree in co-relation 295820. Up to 15067 conditions per place. [2023-08-31 02:22:20,094 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1204 selfloop transitions, 865 changer transitions 30/2099 dead transitions. [2023-08-31 02:22:20,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 2099 transitions, 29584 flow [2023-08-31 02:22:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-31 02:22:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-31 02:22:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 11691 transitions. [2023-08-31 02:22:20,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27782134454979684 [2023-08-31 02:22:20,112 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 11691 transitions. [2023-08-31 02:22:20,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 11691 transitions. [2023-08-31 02:22:20,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:22:20,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 11691 transitions. [2023-08-31 02:22:20,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 140.85542168674698) internal successors, (11691), 83 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:22:20,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 507.0) internal successors, (42588), 84 states have internal predecessors, (42588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:22:20,172 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 507.0) internal successors, (42588), 84 states have internal predecessors, (42588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:22:20,173 INFO L175 Difference]: Start difference. First operand has 461 places, 1027 transitions, 12290 flow. Second operand 83 states and 11691 transitions. [2023-08-31 02:22:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 2099 transitions, 29584 flow [2023-08-31 02:22:50,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 2099 transitions, 28628 flow, removed 374 selfloop flow, removed 16 redundant places. [2023-08-31 02:22:50,233 INFO L231 Difference]: Finished difference. Result has 565 places, 1508 transitions, 21661 flow [2023-08-31 02:22:50,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=11894, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=21661, PETRI_PLACES=565, PETRI_TRANSITIONS=1508} [2023-08-31 02:22:50,234 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 530 predicate places. [2023-08-31 02:22:50,234 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1508 transitions, 21661 flow [2023-08-31 02:22:50,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:22:50,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:22:50,235 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:22:50,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 02:22:50,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 02:22:50,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:22:50,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:22:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1769249571, now seen corresponding path program 6 times [2023-08-31 02:22:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:22:50,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345854748] [2023-08-31 02:22:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:22:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:22:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:22:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:22:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:22:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345854748] [2023-08-31 02:22:52,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345854748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:22:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627161577] [2023-08-31 02:22:52,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:22:52,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:22:52,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:22:52,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:22:52,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 02:22:52,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:22:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:22:52,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:22:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:22:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:22:53,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:22:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:22:53,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:22:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-31 02:22:53,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:22:53,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627161577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:22:53,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:22:53,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2023-08-31 02:22:53,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136431126] [2023-08-31 02:22:53,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:22:53,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 02:22:53,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:22:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 02:22:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-08-31 02:22:54,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 507 [2023-08-31 02:22:54,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1508 transitions, 21661 flow. Second operand has 9 states, 9 states have (on average 203.22222222222223) internal successors, (1829), 9 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:22:54,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:22:54,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 507 [2023-08-31 02:22:54,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:23:09,399 INFO L130 PetriNetUnfolder]: 22917/36776 cut-off events. [2023-08-31 02:23:09,399 INFO L131 PetriNetUnfolder]: For 2406172/2406172 co-relation queries the response was YES. [2023-08-31 02:23:10,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341594 conditions, 36776 events. 22917/36776 cut-off events. For 2406172/2406172 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 271347 event pairs, 3279 based on Foata normal form. 58/35592 useless extension candidates. Maximal degree in co-relation 341416. Up to 24878 conditions per place. [2023-08-31 02:23:10,798 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 1544 selfloop transitions, 134 changer transitions 15/1693 dead transitions. [2023-08-31 02:23:10,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1693 transitions, 28158 flow [2023-08-31 02:23:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:23:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:23:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1459 transitions. [2023-08-31 02:23:10,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41110171879402646 [2023-08-31 02:23:10,799 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1459 transitions. [2023-08-31 02:23:10,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1459 transitions. [2023-08-31 02:23:10,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:23:10,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1459 transitions. [2023-08-31 02:23:10,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.42857142857142) internal successors, (1459), 7 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:23:10,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:23:10,804 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:23:10,804 INFO L175 Difference]: Start difference. First operand has 565 places, 1508 transitions, 21661 flow. Second operand 7 states and 1459 transitions. [2023-08-31 02:23:10,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1693 transitions, 28158 flow [2023-08-31 02:23:42,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1693 transitions, 26578 flow, removed 700 selfloop flow, removed 21 redundant places. [2023-08-31 02:23:42,363 INFO L231 Difference]: Finished difference. Result has 545 places, 1480 transitions, 20262 flow [2023-08-31 02:23:42,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=19832, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20262, PETRI_PLACES=545, PETRI_TRANSITIONS=1480} [2023-08-31 02:23:42,364 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 510 predicate places. [2023-08-31 02:23:42,364 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1480 transitions, 20262 flow [2023-08-31 02:23:42,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 203.22222222222223) internal successors, (1829), 9 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:23:42,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:23:42,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:23:42,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:23:42,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 02:23:42,565 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:23:42,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:23:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1876870303, now seen corresponding path program 6 times [2023-08-31 02:23:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:23:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943290968] [2023-08-31 02:23:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:23:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:23:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:23:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 02:23:42,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:23:42,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943290968] [2023-08-31 02:23:42,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943290968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:23:42,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:23:42,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:23:42,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159104740] [2023-08-31 02:23:42,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:23:42,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:23:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:23:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:23:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:23:42,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-31 02:23:42,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1480 transitions, 20262 flow. Second operand has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:23:42,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:23:42,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-31 02:23:42,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:24:03,681 INFO L130 PetriNetUnfolder]: 32679/50995 cut-off events. [2023-08-31 02:24:03,681 INFO L131 PetriNetUnfolder]: For 3740368/3740368 co-relation queries the response was YES. [2023-08-31 02:24:05,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492823 conditions, 50995 events. 32679/50995 cut-off events. For 3740368/3740368 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 373322 event pairs, 6708 based on Foata normal form. 1924/49943 useless extension candidates. Maximal degree in co-relation 492649. Up to 19088 conditions per place. [2023-08-31 02:24:06,034 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 1484 selfloop transitions, 195 changer transitions 67/1746 dead transitions. [2023-08-31 02:24:06,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1746 transitions, 27622 flow [2023-08-31 02:24:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:24:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:24:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 953 transitions. [2023-08-31 02:24:06,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46992110453648916 [2023-08-31 02:24:06,036 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 953 transitions. [2023-08-31 02:24:06,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 953 transitions. [2023-08-31 02:24:06,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:24:06,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 953 transitions. [2023-08-31 02:24:06,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:24:06,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:24:06,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:24:06,038 INFO L175 Difference]: Start difference. First operand has 545 places, 1480 transitions, 20262 flow. Second operand 4 states and 953 transitions. [2023-08-31 02:24:06,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1746 transitions, 27622 flow [2023-08-31 02:25:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 1746 transitions, 26429 flow, removed 224 selfloop flow, removed 36 redundant places. [2023-08-31 02:25:57,872 INFO L231 Difference]: Finished difference. Result has 472 places, 1154 transitions, 16002 flow [2023-08-31 02:25:57,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=15187, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=16002, PETRI_PLACES=472, PETRI_TRANSITIONS=1154} [2023-08-31 02:25:57,873 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 437 predicate places. [2023-08-31 02:25:57,873 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1154 transitions, 16002 flow [2023-08-31 02:25:57,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:25:57,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:25:57,874 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:25:57,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 02:25:57,874 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:25:57,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:25:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash -784039819, now seen corresponding path program 7 times [2023-08-31 02:25:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:25:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070544075] [2023-08-31 02:25:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:25:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:25:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:26:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:26:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:26:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070544075] [2023-08-31 02:26:00,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070544075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:26:00,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848022173] [2023-08-31 02:26:00,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:26:00,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:26:00,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:26:00,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:26:00,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 02:26:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:26:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:26:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:26:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:26:01,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:26:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:26:01,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:26:01,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:26:01,834 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 44 treesize of output 32 [2023-08-31 02:26:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:26:01,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:26:02,370 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (v_ArrVal_928 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2023-08-31 02:26:02,417 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2~0.base Int) (v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))))))) is different from false [2023-08-31 02:26:02,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:26:02,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1938 treesize of output 1750 [2023-08-31 02:26:02,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:26:02,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 406 treesize of output 338 [2023-08-31 02:26:02,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:26:02,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 305 treesize of output 291 [2023-08-31 02:26:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 02:26:10,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848022173] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:26:10,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:26:10,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18, 12] total 37 [2023-08-31 02:26:10,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973116767] [2023-08-31 02:26:10,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:26:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:26:10,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:26:10,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:26:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1159, Unknown=2, NotChecked=138, Total=1406 [2023-08-31 02:26:10,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 507 [2023-08-31 02:26:10,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1154 transitions, 16002 flow. Second operand has 11 states, 11 states have (on average 180.8181818181818) internal successors, (1989), 11 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:10,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:26:10,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 507 [2023-08-31 02:26:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:26:10,703 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_front~0 4)) (.cse1 (* c_~q2_back~0 4)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((~q2~0.base Int) (v_ArrVal_928 (Array Int Int)) (v_ArrVal_927 (Array Int Int)) (~q2~0.offset Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_927) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_928))) (let ((.cse0 (select .cse2 ~q2~0.base))) (or (< (+ (select .cse0 (+ ~q2~0.offset .cse1)) 1) (select (select .cse2 c_~q1~0.base) .cse3)) (< 0 (select .cse0 (+ ~q2~0.offset .cse4))))))) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~q1~0.base)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse5 (select |c_#memory_int| ~q2~0.base))) (or (< 0 (select .cse5 (+ ~q2~0.offset .cse4))) (< (+ (select .cse5 (+ ~q2~0.offset .cse1)) 1) (select (select |c_#memory_int| c_~q1~0.base) .cse3))))) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| c_~q1~0.base)))) is different from false [2023-08-31 02:26:27,045 INFO L130 PetriNetUnfolder]: 32246/50414 cut-off events. [2023-08-31 02:26:27,045 INFO L131 PetriNetUnfolder]: For 1828516/1828516 co-relation queries the response was YES. [2023-08-31 02:26:28,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436690 conditions, 50414 events. 32246/50414 cut-off events. For 1828516/1828516 co-relation queries the response was YES. Maximal size of possible extension queue 1540. Compared 366816 event pairs, 6467 based on Foata normal form. 34/47628 useless extension candidates. Maximal degree in co-relation 436544. Up to 31775 conditions per place. [2023-08-31 02:26:28,776 INFO L137 encePairwiseOnDemand]: 492/507 looper letters, 846 selfloop transitions, 568 changer transitions 0/1414 dead transitions. [2023-08-31 02:26:28,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1414 transitions, 22702 flow [2023-08-31 02:26:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:26:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:26:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1858 transitions. [2023-08-31 02:26:28,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36646942800788956 [2023-08-31 02:26:28,779 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1858 transitions. [2023-08-31 02:26:28,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1858 transitions. [2023-08-31 02:26:28,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:26:28,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1858 transitions. [2023-08-31 02:26:28,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.8) internal successors, (1858), 10 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:28,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 507.0) internal successors, (5577), 11 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:28,786 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 507.0) internal successors, (5577), 11 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:28,786 INFO L175 Difference]: Start difference. First operand has 472 places, 1154 transitions, 16002 flow. Second operand 10 states and 1858 transitions. [2023-08-31 02:26:28,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1414 transitions, 22702 flow [2023-08-31 02:26:59,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1414 transitions, 22123 flow, removed 243 selfloop flow, removed 10 redundant places. [2023-08-31 02:26:59,444 INFO L231 Difference]: Finished difference. Result has 457 places, 1338 transitions, 20965 flow [2023-08-31 02:26:59,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=15547, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20965, PETRI_PLACES=457, PETRI_TRANSITIONS=1338} [2023-08-31 02:26:59,445 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 422 predicate places. [2023-08-31 02:26:59,445 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1338 transitions, 20965 flow [2023-08-31 02:26:59,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 180.8181818181818) internal successors, (1989), 11 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:26:59,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:26:59,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:26:59,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 02:26:59,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 02:26:59,646 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:26:59,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:26:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash 949483153, now seen corresponding path program 8 times [2023-08-31 02:26:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:26:59,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621087235] [2023-08-31 02:26:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:26:59,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:26:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:27:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:27:02,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:27:02,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621087235] [2023-08-31 02:27:02,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621087235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:27:02,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522313658] [2023-08-31 02:27:02,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:27:02,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:27:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:27:02,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:27:02,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 02:27:02,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:27:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:27:02,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 02:27:02,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:27:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:27:02,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:27:02,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 02:27:03,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-31 02:27:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:27:03,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:27:03,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:27:03,255 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 25 treesize of output 17 [2023-08-31 02:27:03,439 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~q2_front~0 c_~q2_back~0) (forall ((v_ArrVal_1001 (Array Int Int))) (<= 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1001) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-31 02:27:03,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:27:03,452 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 46 treesize of output 38 [2023-08-31 02:27:03,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-08-31 02:27:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 02:27:03,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522313658] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:27:03,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:27:03,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [19, 11] total 33 [2023-08-31 02:27:03,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966289905] [2023-08-31 02:27:03,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:27:03,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:27:03,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:27:03,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:27:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=968, Unknown=1, NotChecked=62, Total=1122 [2023-08-31 02:27:03,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 507 [2023-08-31 02:27:03,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1338 transitions, 20965 flow. Second operand has 10 states, 10 states have (on average 184.1) internal successors, (1841), 10 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:03,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:27:03,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 507 [2023-08-31 02:27:03,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:27:23,024 INFO L130 PetriNetUnfolder]: 32344/50728 cut-off events. [2023-08-31 02:27:23,024 INFO L131 PetriNetUnfolder]: For 1829601/1829601 co-relation queries the response was YES. [2023-08-31 02:27:24,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450147 conditions, 50728 events. 32344/50728 cut-off events. For 1829601/1829601 co-relation queries the response was YES. Maximal size of possible extension queue 1559. Compared 371839 event pairs, 6569 based on Foata normal form. 58/47966 useless extension candidates. Maximal degree in co-relation 450005. Up to 30620 conditions per place. [2023-08-31 02:27:24,805 INFO L137 encePairwiseOnDemand]: 492/507 looper letters, 770 selfloop transitions, 699 changer transitions 0/1469 dead transitions. [2023-08-31 02:27:24,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1469 transitions, 25792 flow [2023-08-31 02:27:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:27:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:27:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1885 transitions. [2023-08-31 02:27:24,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2023-08-31 02:27:24,808 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1885 transitions. [2023-08-31 02:27:24,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1885 transitions. [2023-08-31 02:27:24,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:27:24,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1885 transitions. [2023-08-31 02:27:24,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 188.5) internal successors, (1885), 10 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:24,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 507.0) internal successors, (5577), 11 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:24,814 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 507.0) internal successors, (5577), 11 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:27:24,814 INFO L175 Difference]: Start difference. First operand has 457 places, 1338 transitions, 20965 flow. Second operand 10 states and 1885 transitions. [2023-08-31 02:27:24,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1469 transitions, 25792 flow [2023-08-31 02:28:01,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1469 transitions, 25389 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-08-31 02:28:01,757 INFO L231 Difference]: Finished difference. Result has 468 places, 1394 transitions, 24315 flow [2023-08-31 02:28:01,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=20575, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=644, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24315, PETRI_PLACES=468, PETRI_TRANSITIONS=1394} [2023-08-31 02:28:01,759 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 433 predicate places. [2023-08-31 02:28:01,759 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1394 transitions, 24315 flow [2023-08-31 02:28:01,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 184.1) internal successors, (1841), 10 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:28:01,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:28:01,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:28:01,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 02:28:01,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:28:01,967 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:28:01,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:28:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1193154190, now seen corresponding path program 1 times [2023-08-31 02:28:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:28:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892441682] [2023-08-31 02:28:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:28:01,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:28:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:28:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:28:02,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:28:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892441682] [2023-08-31 02:28:02,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892441682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:28:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717762395] [2023-08-31 02:28:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:28:02,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:28:02,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:28:02,141 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:28:02,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 02:28:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:28:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 02:28:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:28:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:28:02,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:28:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:28:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717762395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:28:02,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:28:02,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-31 02:28:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312617926] [2023-08-31 02:28:02,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:28:02,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:28:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:28:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:28:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:28:02,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 507 [2023-08-31 02:28:02,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1394 transitions, 24315 flow. Second operand has 11 states, 11 states have (on average 207.54545454545453) internal successors, (2283), 11 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:28:02,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:28:02,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 507 [2023-08-31 02:28:02,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:28:22,124 INFO L130 PetriNetUnfolder]: 30925/49749 cut-off events. [2023-08-31 02:28:22,124 INFO L131 PetriNetUnfolder]: For 2080056/2080056 co-relation queries the response was YES. [2023-08-31 02:28:23,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434667 conditions, 49749 events. 30925/49749 cut-off events. For 2080056/2080056 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 378151 event pairs, 13061 based on Foata normal form. 3472/50239 useless extension candidates. Maximal degree in co-relation 434519. Up to 38586 conditions per place. [2023-08-31 02:28:23,981 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 1116 selfloop transitions, 37 changer transitions 414/1567 dead transitions. [2023-08-31 02:28:23,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 1567 transitions, 29449 flow [2023-08-31 02:28:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:28:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:28:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2023-08-31 02:28:23,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42176199868507563 [2023-08-31 02:28:23,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2023-08-31 02:28:23,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2023-08-31 02:28:23,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:28:23,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2023-08-31 02:28:23,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:28:23,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:28:23,987 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:28:23,987 INFO L175 Difference]: Start difference. First operand has 468 places, 1394 transitions, 24315 flow. Second operand 6 states and 1283 transitions. [2023-08-31 02:28:23,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 1567 transitions, 29449 flow [2023-08-31 02:28:53,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1567 transitions, 28866 flow, removed 140 selfloop flow, removed 13 redundant places. [2023-08-31 02:28:53,762 INFO L231 Difference]: Finished difference. Result has 460 places, 1070 transitions, 17537 flow [2023-08-31 02:28:53,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=21800, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17537, PETRI_PLACES=460, PETRI_TRANSITIONS=1070} [2023-08-31 02:28:53,764 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 425 predicate places. [2023-08-31 02:28:53,764 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 1070 transitions, 17537 flow [2023-08-31 02:28:53,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.54545454545453) internal successors, (2283), 11 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:28:53,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:28:53,765 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:28:53,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 02:28:53,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:28:53,967 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:28:53,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:28:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -859782668, now seen corresponding path program 9 times [2023-08-31 02:28:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:28:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678789342] [2023-08-31 02:28:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:28:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:28:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:28:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:28:56,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:28:56,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678789342] [2023-08-31 02:28:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678789342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:28:56,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653266458] [2023-08-31 02:28:56,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:28:56,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:28:56,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:28:56,976 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:28:56,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 02:28:57,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:28:57,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:28:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 02:28:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:28:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:28:58,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 02:28:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:28:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:28:58,865 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 02:28:58,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2023-08-31 02:28:59,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:28:59,056 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 34 treesize of output 29 [2023-08-31 02:28:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 02:28:59,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:28:59,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:28:59,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 292 treesize of output 320 [2023-08-31 02:29:00,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:29:00,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2023-08-31 02:29:01,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-31 02:29:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 02:29:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653266458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:29:02,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:29:02,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 15] total 46 [2023-08-31 02:29:02,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73978286] [2023-08-31 02:29:02,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:29:02,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-31 02:29:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-31 02:29:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1969, Unknown=7, NotChecked=0, Total=2162 [2023-08-31 02:29:18,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 507 [2023-08-31 02:29:18,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 1070 transitions, 17537 flow. Second operand has 47 states, 47 states have (on average 144.95744680851064) internal successors, (6813), 47 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:18,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:18,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 507 [2023-08-31 02:29:18,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15