./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:11:55,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:11:55,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:11:55,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:11:55,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:11:55,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:11:55,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:11:55,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:11:55,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:11:55,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:11:55,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:11:55,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:11:55,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:11:55,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:11:55,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:11:55,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:11:55,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:11:55,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:11:55,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:11:55,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:11:55,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:11:55,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:11:55,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:11:55,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:11:55,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:11:55,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:11:55,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:11:55,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:11:55,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:11:55,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:11:55,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:11:55,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:11:55,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:11:55,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:11:55,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:11:55,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:11:55,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:11:55,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:11:55,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:11:55,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:11:55,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:11:55,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 12:11:55,304 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:11:55,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:11:55,304 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:11:55,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:11:55,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:11:55,306 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:11:55,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:11:55,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:11:55,307 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:11:55,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:11:55,308 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:11:55,308 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:11:55,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:11:55,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:11:55,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:11:55,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:11:55,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:11:55,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:11:55,310 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 12:11:55,311 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:11:55,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:11:55,311 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:11:55,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:11:55,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:11:55,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:11:55,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:11:55,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:11:55,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:11:55,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:11:55,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:11:55,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:11:55,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:11:55,315 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:11:55,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:11:55,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:11:55,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-11-20 12:11:55,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:11:55,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:11:55,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:11:55,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:11:55,609 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:11:55,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-20 12:11:58,606 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:11:58,835 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:11:58,836 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-11-20 12:11:58,847 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/data/368466e27/65abb96d508f4aa897ce8f1d15febdd9/FLAG1940a836d [2022-11-20 12:11:58,861 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/data/368466e27/65abb96d508f4aa897ce8f1d15febdd9 [2022-11-20 12:11:58,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:11:58,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:11:58,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:11:58,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:11:58,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:11:58,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:11:58" (1/1) ... [2022-11-20 12:11:58,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ade7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:58, skipping insertion in model container [2022-11-20 12:11:58,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:11:58" (1/1) ... [2022-11-20 12:11:58,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:11:58,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:11:59,100 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-20 12:11:59,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:11:59,120 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:11:59,142 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-11-20 12:11:59,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:11:59,164 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:11:59,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59 WrapperNode [2022-11-20 12:11:59,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:11:59,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:11:59,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:11:59,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:11:59,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,218 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 178 [2022-11-20 12:11:59,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:11:59,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:11:59,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:11:59,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:11:59,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:11:59,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:11:59,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:11:59,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:11:59,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (1/1) ... [2022-11-20 12:11:59,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:11:59,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:11:59,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:11:59,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:11:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:11:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:11:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:11:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:11:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:11:59,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:11:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:11:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:11:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:11:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:11:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:11:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:11:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:11:59,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:11:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:11:59,354 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:11:59,505 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:11:59,508 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:11:59,934 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:12:00,264 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:12:00,265 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 12:12:00,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:12:00 BoogieIcfgContainer [2022-11-20 12:12:00,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:12:00,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:12:00,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:12:00,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:12:00,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:11:58" (1/3) ... [2022-11-20 12:12:00,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a699c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:12:00, skipping insertion in model container [2022-11-20 12:12:00,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:11:59" (2/3) ... [2022-11-20 12:12:00,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a699c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:12:00, skipping insertion in model container [2022-11-20 12:12:00,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:12:00" (3/3) ... [2022-11-20 12:12:00,281 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-11-20 12:12:00,288 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:12:00,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:12:00,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-20 12:12:00,296 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:12:00,391 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:12:00,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 300 flow [2022-11-20 12:12:00,488 INFO L130 PetriNetUnfolder]: 9/140 cut-off events. [2022-11-20 12:12:00,488 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:12:00,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 9/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 176 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-11-20 12:12:00,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 300 flow [2022-11-20 12:12:00,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 121 transitions, 251 flow [2022-11-20 12:12:00,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:12:00,532 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;@632b5b41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:12:00,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-20 12:12:00,565 INFO L130 PetriNetUnfolder]: 3/56 cut-off events. [2022-11-20 12:12:00,566 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:12:00,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:00,566 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:00,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2057947961, now seen corresponding path program 1 times [2022-11-20 12:12:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:00,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467848416] [2022-11-20 12:12:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:00,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:01,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467848416] [2022-11-20 12:12:01,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467848416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:01,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:01,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:12:01,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626556840] [2022-11-20 12:12:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:01,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:12:01,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:01,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:12:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:12:01,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-20 12:12:01,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 121 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:01,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:01,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-20 12:12:01,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:01,462 INFO L130 PetriNetUnfolder]: 157/569 cut-off events. [2022-11-20 12:12:01,462 INFO L131 PetriNetUnfolder]: For 96/106 co-relation queries the response was YES. [2022-11-20 12:12:01,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 569 events. 157/569 cut-off events. For 96/106 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2927 event pairs, 70 based on Foata normal form. 44/365 useless extension candidates. Maximal degree in co-relation 343. Up to 137 conditions per place. [2022-11-20 12:12:01,469 INFO L137 encePairwiseOnDemand]: 127/142 looper letters, 42 selfloop transitions, 4 changer transitions 2/133 dead transitions. [2022-11-20 12:12:01,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 133 transitions, 376 flow [2022-11-20 12:12:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:12:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:12:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2022-11-20 12:12:01,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8295774647887324 [2022-11-20 12:12:01,485 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2022-11-20 12:12:01,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2022-11-20 12:12:01,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:01,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2022-11-20 12:12:01,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:01,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:01,501 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:01,503 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 251 flow. Second operand 5 states and 589 transitions. [2022-11-20 12:12:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 133 transitions, 376 flow [2022-11-20 12:12:01,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 133 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 12:12:01,541 INFO L231 Difference]: Finished difference. Result has 120 places, 113 transitions, 254 flow [2022-11-20 12:12:01,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=120, PETRI_TRANSITIONS=113} [2022-11-20 12:12:01,547 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 0 predicate places. [2022-11-20 12:12:01,548 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 254 flow [2022-11-20 12:12:01,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:01,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:01,548 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:01,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:12:01,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:01,550 INFO L85 PathProgramCache]: Analyzing trace with hash 734160778, now seen corresponding path program 1 times [2022-11-20 12:12:01,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:01,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953886272] [2022-11-20 12:12:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:01,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:01,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:01,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953886272] [2022-11-20 12:12:01,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953886272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:01,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:01,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:12:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047685718] [2022-11-20 12:12:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:01,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:12:01,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:12:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:12:01,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 142 [2022-11-20 12:12:01,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 113 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 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) [2022-11-20 12:12:01,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:01,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 142 [2022-11-20 12:12:01,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:02,120 INFO L130 PetriNetUnfolder]: 139/551 cut-off events. [2022-11-20 12:12:02,120 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-20 12:12:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 551 events. 139/551 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2915 event pairs, 87 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 630. Up to 226 conditions per place. [2022-11-20 12:12:02,131 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 49 selfloop transitions, 8 changer transitions 2/136 dead transitions. [2022-11-20 12:12:02,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 136 transitions, 424 flow [2022-11-20 12:12:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:12:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 12:12:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 828 transitions. [2022-11-20 12:12:02,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7288732394366197 [2022-11-20 12:12:02,138 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 828 transitions. [2022-11-20 12:12:02,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 828 transitions. [2022-11-20 12:12:02,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:02,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 828 transitions. [2022-11-20 12:12:02,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:02,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:02,147 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:02,147 INFO L175 Difference]: Start difference. First operand has 120 places, 113 transitions, 254 flow. Second operand 8 states and 828 transitions. [2022-11-20 12:12:02,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 136 transitions, 424 flow [2022-11-20 12:12:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 136 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:12:02,154 INFO L231 Difference]: Finished difference. Result has 127 places, 115 transitions, 284 flow [2022-11-20 12:12:02,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=115} [2022-11-20 12:12:02,156 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 7 predicate places. [2022-11-20 12:12:02,156 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 115 transitions, 284 flow [2022-11-20 12:12:02,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.0) internal successors, (686), 7 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) [2022-11-20 12:12:02,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:02,158 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:02,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:12:02,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1409923475, now seen corresponding path program 1 times [2022-11-20 12:12:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505772470] [2022-11-20 12:12:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:02,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505772470] [2022-11-20 12:12:02,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505772470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820878058] [2022-11-20 12:12:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:02,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:02,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:02,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:12:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:12:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:02,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:02,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820878058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:02,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:02,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 12:12:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060949134] [2022-11-20 12:12:02,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:02,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:12:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:12:02,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:12:02,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-20 12:12:02,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 115 transitions, 284 flow. Second operand has 12 states, 12 states have (on average 107.66666666666667) internal successors, (1292), 12 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:02,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:02,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-20 12:12:02,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:03,344 INFO L130 PetriNetUnfolder]: 324/1173 cut-off events. [2022-11-20 12:12:03,344 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-20 12:12:03,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 1173 events. 324/1173 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6906 event pairs, 145 based on Foata normal form. 3/697 useless extension candidates. Maximal degree in co-relation 1691. Up to 132 conditions per place. [2022-11-20 12:12:03,354 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 88 selfloop transitions, 18 changer transitions 0/192 dead transitions. [2022-11-20 12:12:03,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 192 transitions, 694 flow [2022-11-20 12:12:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:12:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 12:12:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1999 transitions. [2022-11-20 12:12:03,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7820813771517997 [2022-11-20 12:12:03,360 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1999 transitions. [2022-11-20 12:12:03,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1999 transitions. [2022-11-20 12:12:03,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:03,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1999 transitions. [2022-11-20 12:12:03,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 111.05555555555556) internal successors, (1999), 18 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:03,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:03,373 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:03,374 INFO L175 Difference]: Start difference. First operand has 127 places, 115 transitions, 284 flow. Second operand 18 states and 1999 transitions. [2022-11-20 12:12:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 192 transitions, 694 flow [2022-11-20 12:12:03,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 192 transitions, 684 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:12:03,385 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 380 flow [2022-11-20 12:12:03,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=380, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-11-20 12:12:03,387 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 24 predicate places. [2022-11-20 12:12:03,391 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 380 flow [2022-11-20 12:12:03,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.66666666666667) internal successors, (1292), 12 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:03,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:03,395 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:03,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:03,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:03,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:03,601 INFO L85 PathProgramCache]: Analyzing trace with hash 757955234, now seen corresponding path program 1 times [2022-11-20 12:12:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:03,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484413280] [2022-11-20 12:12:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:03,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:03,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484413280] [2022-11-20 12:12:03,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484413280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:03,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937458131] [2022-11-20 12:12:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:03,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:03,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:03,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:03,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:12:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:12:03,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:03,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:12:03,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937458131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:03,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:12:03,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 12:12:03,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783389594] [2022-11-20 12:12:03,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:03,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:12:03,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:12:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:12:03,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 142 [2022-11-20 12:12:03,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:03,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:03,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 142 [2022-11-20 12:12:03,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:04,332 INFO L130 PetriNetUnfolder]: 324/1169 cut-off events. [2022-11-20 12:12:04,333 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-11-20 12:12:04,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 1169 events. 324/1169 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6865 event pairs, 145 based on Foata normal form. 4/694 useless extension candidates. Maximal degree in co-relation 1429. Up to 512 conditions per place. [2022-11-20 12:12:04,341 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 38 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2022-11-20 12:12:04,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 135 transitions, 481 flow [2022-11-20 12:12:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:12:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 12:12:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 776 transitions. [2022-11-20 12:12:04,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7806841046277666 [2022-11-20 12:12:04,344 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 776 transitions. [2022-11-20 12:12:04,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 776 transitions. [2022-11-20 12:12:04,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:04,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 776 transitions. [2022-11-20 12:12:04,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:04,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 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) [2022-11-20 12:12:04,350 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 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) [2022-11-20 12:12:04,350 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 380 flow. Second operand 7 states and 776 transitions. [2022-11-20 12:12:04,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 135 transitions, 481 flow [2022-11-20 12:12:04,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 135 transitions, 449 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 12:12:04,360 INFO L231 Difference]: Finished difference. Result has 140 places, 123 transitions, 343 flow [2022-11-20 12:12:04,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=140, PETRI_TRANSITIONS=123} [2022-11-20 12:12:04,362 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 20 predicate places. [2022-11-20 12:12:04,363 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 123 transitions, 343 flow [2022-11-20 12:12:04,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:04,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:04,363 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:04,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:04,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:04,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 678856734, now seen corresponding path program 1 times [2022-11-20 12:12:04,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754976655] [2022-11-20 12:12:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:04,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754976655] [2022-11-20 12:12:04,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754976655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:04,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:04,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:12:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155658987] [2022-11-20 12:12:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:04,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:12:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:12:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:12:04,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 142 [2022-11-20 12:12:04,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 123 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:04,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:04,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 142 [2022-11-20 12:12:04,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:05,199 INFO L130 PetriNetUnfolder]: 482/1446 cut-off events. [2022-11-20 12:12:05,199 INFO L131 PetriNetUnfolder]: For 194/197 co-relation queries the response was YES. [2022-11-20 12:12:05,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1446 events. 482/1446 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8811 event pairs, 350 based on Foata normal form. 3/884 useless extension candidates. Maximal degree in co-relation 2428. Up to 889 conditions per place. [2022-11-20 12:12:05,210 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 38 selfloop transitions, 6 changer transitions 10/133 dead transitions. [2022-11-20 12:12:05,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 133 transitions, 474 flow [2022-11-20 12:12:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:12:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 12:12:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 816 transitions. [2022-11-20 12:12:05,214 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2022-11-20 12:12:05,214 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 816 transitions. [2022-11-20 12:12:05,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 816 transitions. [2022-11-20 12:12:05,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:05,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 816 transitions. [2022-11-20 12:12:05,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,220 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,220 INFO L175 Difference]: Start difference. First operand has 140 places, 123 transitions, 343 flow. Second operand 8 states and 816 transitions. [2022-11-20 12:12:05,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 133 transitions, 474 flow [2022-11-20 12:12:05,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 133 transitions, 460 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 12:12:05,226 INFO L231 Difference]: Finished difference. Result has 144 places, 121 transitions, 333 flow [2022-11-20 12:12:05,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=333, PETRI_PLACES=144, PETRI_TRANSITIONS=121} [2022-11-20 12:12:05,228 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 24 predicate places. [2022-11-20 12:12:05,229 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 121 transitions, 333 flow [2022-11-20 12:12:05,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,229 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:05,230 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:05,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:12:05,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash -532535998, now seen corresponding path program 1 times [2022-11-20 12:12:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:05,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724295394] [2022-11-20 12:12:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:12:05,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:05,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724295394] [2022-11-20 12:12:05,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724295394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:05,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:05,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:12:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598297223] [2022-11-20 12:12:05,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:12:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:12:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:12:05,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-20 12:12:05,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 121 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:05,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-20 12:12:05,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:05,927 INFO L130 PetriNetUnfolder]: 513/1482 cut-off events. [2022-11-20 12:12:05,927 INFO L131 PetriNetUnfolder]: For 91/103 co-relation queries the response was YES. [2022-11-20 12:12:05,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2538 conditions, 1482 events. 513/1482 cut-off events. For 91/103 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10291 event pairs, 200 based on Foata normal form. 0/890 useless extension candidates. Maximal degree in co-relation 2461. Up to 681 conditions per place. [2022-11-20 12:12:05,940 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 23 selfloop transitions, 3 changer transitions 0/131 dead transitions. [2022-11-20 12:12:05,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 131 transitions, 408 flow [2022-11-20 12:12:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:12:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:12:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-20 12:12:05,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8661971830985915 [2022-11-20 12:12:05,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-20 12:12:05,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-20 12:12:05,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:05,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-20 12:12:05,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,950 INFO L175 Difference]: Start difference. First operand has 144 places, 121 transitions, 333 flow. Second operand 3 states and 369 transitions. [2022-11-20 12:12:05,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 131 transitions, 408 flow [2022-11-20 12:12:05,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 131 transitions, 386 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-20 12:12:05,956 INFO L231 Difference]: Finished difference. Result has 133 places, 123 transitions, 336 flow [2022-11-20 12:12:05,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=133, PETRI_TRANSITIONS=123} [2022-11-20 12:12:05,959 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 13 predicate places. [2022-11-20 12:12:05,960 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 123 transitions, 336 flow [2022-11-20 12:12:05,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:05,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:05,960 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:05,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:12:05,961 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash -532536002, now seen corresponding path program 1 times [2022-11-20 12:12:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:05,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744168147] [2022-11-20 12:12:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:05,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:06,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:06,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744168147] [2022-11-20 12:12:06,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744168147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:06,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90339447] [2022-11-20 12:12:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:06,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:06,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:06,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:06,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:12:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:06,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:12:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:06,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:12:07,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:07,175 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 [2022-11-20 12:12:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:07,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:07,394 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_99 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_99) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-20 12:12:07,417 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_99 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_99) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-20 12:12:07,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:07,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 12:12:07,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:07,548 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 38 treesize of output 36 [2022-11-20 12:12:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:07,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90339447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:07,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:07,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-20 12:12:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520755146] [2022-11-20 12:12:07,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:07,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:12:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:12:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=932, Unknown=10, NotChecked=126, Total=1190 [2022-11-20 12:12:07,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 142 [2022-11-20 12:12:07,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 123 transitions, 336 flow. Second operand has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:07,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:07,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 142 [2022-11-20 12:12:07,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:10,250 INFO L130 PetriNetUnfolder]: 2150/4675 cut-off events. [2022-11-20 12:12:10,250 INFO L131 PetriNetUnfolder]: For 325/580 co-relation queries the response was YES. [2022-11-20 12:12:10,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9263 conditions, 4675 events. 2150/4675 cut-off events. For 325/580 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 35998 event pairs, 738 based on Foata normal form. 2/2839 useless extension candidates. Maximal degree in co-relation 9172. Up to 2260 conditions per place. [2022-11-20 12:12:10,287 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 67 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2022-11-20 12:12:10,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 166 transitions, 629 flow [2022-11-20 12:12:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:12:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 12:12:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1568 transitions. [2022-11-20 12:12:10,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6134585289514867 [2022-11-20 12:12:10,292 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1568 transitions. [2022-11-20 12:12:10,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1568 transitions. [2022-11-20 12:12:10,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:10,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1568 transitions. [2022-11-20 12:12:10,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.11111111111111) internal successors, (1568), 18 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:10,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:10,303 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:10,303 INFO L175 Difference]: Start difference. First operand has 133 places, 123 transitions, 336 flow. Second operand 18 states and 1568 transitions. [2022-11-20 12:12:10,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 166 transitions, 629 flow [2022-11-20 12:12:10,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 166 transitions, 626 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:12:10,307 INFO L231 Difference]: Finished difference. Result has 157 places, 145 transitions, 492 flow [2022-11-20 12:12:10,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=492, PETRI_PLACES=157, PETRI_TRANSITIONS=145} [2022-11-20 12:12:10,308 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 37 predicate places. [2022-11-20 12:12:10,309 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 492 flow [2022-11-20 12:12:10,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:10,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:10,310 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:10,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:10,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:10,516 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash -532535999, now seen corresponding path program 1 times [2022-11-20 12:12:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:10,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902027662] [2022-11-20 12:12:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:10,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:11,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:11,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902027662] [2022-11-20 12:12:11,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902027662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:11,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481426311] [2022-11-20 12:12:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:11,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:11,256 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:11,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:12:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 12:12:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:11,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:12:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:11,664 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 14 treesize of output 16 [2022-11-20 12:12:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:11,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:11,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:11,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-20 12:12:12,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:12,007 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 32 [2022-11-20 12:12:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:12,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481426311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:12,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:12,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-20 12:12:12,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605733151] [2022-11-20 12:12:12,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:12,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:12:12,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:12:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1051, Unknown=13, NotChecked=0, Total=1190 [2022-11-20 12:12:12,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 142 [2022-11-20 12:12:12,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 145 transitions, 492 flow. Second operand has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:12,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:12,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 142 [2022-11-20 12:12:12,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:14,724 INFO L130 PetriNetUnfolder]: 2273/5029 cut-off events. [2022-11-20 12:12:14,724 INFO L131 PetriNetUnfolder]: For 761/1098 co-relation queries the response was YES. [2022-11-20 12:12:14,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10582 conditions, 5029 events. 2273/5029 cut-off events. For 761/1098 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 39158 event pairs, 754 based on Foata normal form. 4/3149 useless extension candidates. Maximal degree in co-relation 10472. Up to 2404 conditions per place. [2022-11-20 12:12:14,770 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 67 selfloop transitions, 33 changer transitions 0/169 dead transitions. [2022-11-20 12:12:14,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 760 flow [2022-11-20 12:12:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:12:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 12:12:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1567 transitions. [2022-11-20 12:12:14,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6130672926447575 [2022-11-20 12:12:14,775 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1567 transitions. [2022-11-20 12:12:14,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1567 transitions. [2022-11-20 12:12:14,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:14,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1567 transitions. [2022-11-20 12:12:14,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.05555555555556) internal successors, (1567), 18 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:14,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:14,786 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:14,786 INFO L175 Difference]: Start difference. First operand has 157 places, 145 transitions, 492 flow. Second operand 18 states and 1567 transitions. [2022-11-20 12:12:14,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 760 flow [2022-11-20 12:12:14,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 169 transitions, 751 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 12:12:14,792 INFO L231 Difference]: Finished difference. Result has 170 places, 149 transitions, 577 flow [2022-11-20 12:12:14,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=577, PETRI_PLACES=170, PETRI_TRANSITIONS=149} [2022-11-20 12:12:14,794 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 50 predicate places. [2022-11-20 12:12:14,794 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 149 transitions, 577 flow [2022-11-20 12:12:14,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 84.08571428571429) internal successors, (2943), 35 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:14,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:14,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:14,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:15,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 12:12:15,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash 829907582, now seen corresponding path program 1 times [2022-11-20 12:12:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:15,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552703848] [2022-11-20 12:12:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:12:15,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:15,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552703848] [2022-11-20 12:12:15,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552703848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:15,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:15,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:12:15,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560258626] [2022-11-20 12:12:15,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:15,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:12:15,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:15,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:12:15,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:12:15,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-20 12:12:15,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 149 transitions, 577 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:15,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:15,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-20 12:12:15,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:16,091 INFO L130 PetriNetUnfolder]: 1504/4360 cut-off events. [2022-11-20 12:12:16,091 INFO L131 PetriNetUnfolder]: For 1349/1579 co-relation queries the response was YES. [2022-11-20 12:12:16,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9495 conditions, 4360 events. 1504/4360 cut-off events. For 1349/1579 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 39150 event pairs, 589 based on Foata normal form. 17/2870 useless extension candidates. Maximal degree in co-relation 9398. Up to 1511 conditions per place. [2022-11-20 12:12:16,120 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 58 selfloop transitions, 7 changer transitions 0/181 dead transitions. [2022-11-20 12:12:16,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 181 transitions, 823 flow [2022-11-20 12:12:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:12:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:12:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2022-11-20 12:12:16,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8323943661971831 [2022-11-20 12:12:16,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2022-11-20 12:12:16,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2022-11-20 12:12:16,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:16,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2022-11-20 12:12:16,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:16,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:16,126 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:16,126 INFO L175 Difference]: Start difference. First operand has 170 places, 149 transitions, 577 flow. Second operand 5 states and 591 transitions. [2022-11-20 12:12:16,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 181 transitions, 823 flow [2022-11-20 12:12:16,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 181 transitions, 787 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-20 12:12:16,138 INFO L231 Difference]: Finished difference. Result has 163 places, 153 transitions, 595 flow [2022-11-20 12:12:16,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=595, PETRI_PLACES=163, PETRI_TRANSITIONS=153} [2022-11-20 12:12:16,140 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 43 predicate places. [2022-11-20 12:12:16,140 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 595 flow [2022-11-20 12:12:16,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:16,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:16,141 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:12:16,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1400933945, now seen corresponding path program 1 times [2022-11-20 12:12:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:16,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570888126] [2022-11-20 12:12:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:16,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:16,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570888126] [2022-11-20 12:12:16,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570888126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:16,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332603868] [2022-11-20 12:12:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:16,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:16,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:16,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:12:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 12:12:17,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:17,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:12:17,053 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:12:17,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 12:12:17,232 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:12:17,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 12:12:17,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:12:17,624 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 14 treesize of output 16 [2022-11-20 12:12:17,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:17,748 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 14 treesize of output 16 [2022-11-20 12:12:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:17,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:17,936 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_162 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_162) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-20 12:12:18,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:18,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-20 12:12:18,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:18,341 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 126 treesize of output 120 [2022-11-20 12:12:18,353 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 106 treesize of output 98 [2022-11-20 12:12:18,360 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 98 treesize of output 94 [2022-11-20 12:12:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:19,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332603868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:19,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:19,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-20 12:12:19,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134113826] [2022-11-20 12:12:19,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:19,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 12:12:19,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:19,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 12:12:19,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1464, Unknown=38, NotChecked=78, Total=1722 [2022-11-20 12:12:19,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-20 12:12:19,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 595 flow. Second operand has 42 states, 42 states have (on average 78.97619047619048) internal successors, (3317), 42 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:19,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:19,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-20 12:12:19,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:22,759 INFO L130 PetriNetUnfolder]: 2594/6884 cut-off events. [2022-11-20 12:12:22,760 INFO L131 PetriNetUnfolder]: For 5265/5695 co-relation queries the response was YES. [2022-11-20 12:12:22,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 6884 events. 2594/6884 cut-off events. For 5265/5695 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 63540 event pairs, 1276 based on Foata normal form. 39/4982 useless extension candidates. Maximal degree in co-relation 15515. Up to 2219 conditions per place. [2022-11-20 12:12:22,813 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 107 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2022-11-20 12:12:22,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 213 transitions, 1127 flow [2022-11-20 12:12:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:12:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 12:12:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1585 transitions. [2022-11-20 12:12:22,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5874722016308377 [2022-11-20 12:12:22,818 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1585 transitions. [2022-11-20 12:12:22,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1585 transitions. [2022-11-20 12:12:22,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:22,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1585 transitions. [2022-11-20 12:12:22,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.42105263157895) internal successors, (1585), 19 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:22,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:22,830 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:22,830 INFO L175 Difference]: Start difference. First operand has 163 places, 153 transitions, 595 flow. Second operand 19 states and 1585 transitions. [2022-11-20 12:12:22,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 213 transitions, 1127 flow [2022-11-20 12:12:22,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 213 transitions, 1123 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:12:22,845 INFO L231 Difference]: Finished difference. Result has 183 places, 166 transitions, 819 flow [2022-11-20 12:12:22,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=819, PETRI_PLACES=183, PETRI_TRANSITIONS=166} [2022-11-20 12:12:22,847 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 63 predicate places. [2022-11-20 12:12:22,850 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 166 transitions, 819 flow [2022-11-20 12:12:22,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 78.97619047619048) internal successors, (3317), 42 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:22,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:22,869 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:22,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:23,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:12:23,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1464774200, now seen corresponding path program 1 times [2022-11-20 12:12:23,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:23,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113304893] [2022-11-20 12:12:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:23,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:23,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113304893] [2022-11-20 12:12:23,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113304893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889925509] [2022-11-20 12:12:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:23,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:23,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:23,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:12:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:12:23,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:23,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:12:23,921 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:12:23,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:12:24,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:12:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:24,298 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 [2022-11-20 12:12:24,392 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 [2022-11-20 12:12:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:24,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:24,471 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_191) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-11-20 12:12:24,477 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_191) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-20 12:12:24,646 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_191 (Array Int Int)) (v_ArrVal_190 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_190) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_191) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-20 12:12:24,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:24,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-20 12:12:24,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:24,752 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 72 treesize of output 70 [2022-11-20 12:12:24,757 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 56 treesize of output 52 [2022-11-20 12:12:24,763 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 24 [2022-11-20 12:12:25,251 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 10 treesize of output 8 [2022-11-20 12:12:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:25,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889925509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:25,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:25,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-20 12:12:25,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846498363] [2022-11-20 12:12:25,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:25,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 12:12:25,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 12:12:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1253, Unknown=24, NotChecked=222, Total=1640 [2022-11-20 12:12:25,289 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-20 12:12:25,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 166 transitions, 819 flow. Second operand has 41 states, 41 states have (on average 79.0) internal successors, (3239), 41 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:25,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:25,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-20 12:12:25,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:27,940 INFO L130 PetriNetUnfolder]: 2568/6839 cut-off events. [2022-11-20 12:12:27,940 INFO L131 PetriNetUnfolder]: For 8647/9078 co-relation queries the response was YES. [2022-11-20 12:12:27,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16587 conditions, 6839 events. 2568/6839 cut-off events. For 8647/9078 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 63277 event pairs, 1250 based on Foata normal form. 39/4953 useless extension candidates. Maximal degree in co-relation 16461. Up to 2199 conditions per place. [2022-11-20 12:12:27,993 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 105 selfloop transitions, 40 changer transitions 0/212 dead transitions. [2022-11-20 12:12:27,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 212 transitions, 1243 flow [2022-11-20 12:12:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:12:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-20 12:12:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1661 transitions. [2022-11-20 12:12:27,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5848591549295775 [2022-11-20 12:12:27,998 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1661 transitions. [2022-11-20 12:12:27,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1661 transitions. [2022-11-20 12:12:28,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:28,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1661 transitions. [2022-11-20 12:12:28,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 83.05) internal successors, (1661), 20 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:28,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:28,011 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:28,011 INFO L175 Difference]: Start difference. First operand has 183 places, 166 transitions, 819 flow. Second operand 20 states and 1661 transitions. [2022-11-20 12:12:28,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 212 transitions, 1243 flow [2022-11-20 12:12:28,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 212 transitions, 1217 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-11-20 12:12:28,033 INFO L231 Difference]: Finished difference. Result has 189 places, 166 transitions, 872 flow [2022-11-20 12:12:28,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=872, PETRI_PLACES=189, PETRI_TRANSITIONS=166} [2022-11-20 12:12:28,034 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 69 predicate places. [2022-11-20 12:12:28,034 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 166 transitions, 872 flow [2022-11-20 12:12:28,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 79.0) internal successors, (3239), 41 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:28,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:28,035 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:28,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 12:12:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:28,241 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1834364626, now seen corresponding path program 1 times [2022-11-20 12:12:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:28,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917166884] [2022-11-20 12:12:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:28,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917166884] [2022-11-20 12:12:28,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917166884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:28,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691221069] [2022-11-20 12:12:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:28,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:28,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:28,878 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:28,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:12:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:12:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:29,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:12:29,119 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:12:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:12:29,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:12:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:29,454 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 14 treesize of output 16 [2022-11-20 12:12:29,509 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 14 treesize of output 16 [2022-11-20 12:12:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:29,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:29,634 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_220 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-20 12:12:29,741 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_220 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456)) is different from false [2022-11-20 12:12:29,753 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_220 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456)) is different from false [2022-11-20 12:12:29,759 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_220 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-11-20 12:12:29,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:29,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-20 12:12:29,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:29,810 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 126 treesize of output 120 [2022-11-20 12:12:29,818 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 106 treesize of output 98 [2022-11-20 12:12:29,827 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 51 treesize of output 47 [2022-11-20 12:12:30,260 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 10 treesize of output 8 [2022-11-20 12:12:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 12:12:30,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691221069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:30,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:30,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-20 12:12:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056520158] [2022-11-20 12:12:30,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 12:12:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:30,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 12:12:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1194, Unknown=9, NotChecked=292, Total=1640 [2022-11-20 12:12:30,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-20 12:12:30,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 166 transitions, 872 flow. Second operand has 41 states, 41 states have (on average 79.07317073170732) internal successors, (3242), 41 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:30,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:30,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-20 12:12:30,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:32,861 INFO L130 PetriNetUnfolder]: 2972/8079 cut-off events. [2022-11-20 12:12:32,862 INFO L131 PetriNetUnfolder]: For 14681/14930 co-relation queries the response was YES. [2022-11-20 12:12:32,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20759 conditions, 8079 events. 2972/8079 cut-off events. For 14681/14930 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 83447 event pairs, 1084 based on Foata normal form. 4/6054 useless extension candidates. Maximal degree in co-relation 20632. Up to 2021 conditions per place. [2022-11-20 12:12:32,923 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 118 selfloop transitions, 28 changer transitions 0/225 dead transitions. [2022-11-20 12:12:32,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 225 transitions, 1495 flow [2022-11-20 12:12:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:12:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-20 12:12:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1660 transitions. [2022-11-20 12:12:32,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5845070422535211 [2022-11-20 12:12:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1660 transitions. [2022-11-20 12:12:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1660 transitions. [2022-11-20 12:12:32,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:32,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1660 transitions. [2022-11-20 12:12:32,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 83.0) internal successors, (1660), 20 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:32,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:32,937 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:32,937 INFO L175 Difference]: Start difference. First operand has 189 places, 166 transitions, 872 flow. Second operand 20 states and 1660 transitions. [2022-11-20 12:12:32,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 225 transitions, 1495 flow [2022-11-20 12:12:32,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 225 transitions, 1453 flow, removed 4 selfloop flow, removed 15 redundant places. [2022-11-20 12:12:32,960 INFO L231 Difference]: Finished difference. Result has 196 places, 178 transitions, 949 flow [2022-11-20 12:12:32,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=949, PETRI_PLACES=196, PETRI_TRANSITIONS=178} [2022-11-20 12:12:32,961 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 76 predicate places. [2022-11-20 12:12:32,961 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 178 transitions, 949 flow [2022-11-20 12:12:32,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 79.07317073170732) internal successors, (3242), 41 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:32,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:32,963 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:32,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 12:12:33,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:12:33,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1834364629, now seen corresponding path program 1 times [2022-11-20 12:12:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443959110] [2022-11-20 12:12:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:33,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443959110] [2022-11-20 12:12:33,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443959110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59254340] [2022-11-20 12:12:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:33,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:33,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:33,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:12:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:12:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:33,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:12:34,071 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:12:34,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:12:34,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:12:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:34,410 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 [2022-11-20 12:12:34,464 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 [2022-11-20 12:12:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:34,662 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (v_ArrVal_248 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_248) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_249) c_~A~0.base) c_~A~0.offset) 4294967296))) is different from false [2022-11-20 12:12:34,678 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (v_ArrVal_248 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_248) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_249) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967296))) is different from false [2022-11-20 12:12:34,691 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (v_ArrVal_248 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_248) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_249) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967296))) is different from false [2022-11-20 12:12:34,697 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (v_ArrVal_248 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_248) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_249) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296))) is different from false [2022-11-20 12:12:34,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:34,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-20 12:12:34,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:34,752 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 142 treesize of output 136 [2022-11-20 12:12:34,759 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 61 treesize of output 57 [2022-11-20 12:12:34,763 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 118 treesize of output 110 [2022-11-20 12:12:35,201 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 10 treesize of output 8 [2022-11-20 12:12:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 12:12:35,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59254340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:35,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:35,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-11-20 12:12:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876492315] [2022-11-20 12:12:35,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 12:12:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 12:12:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1119, Unknown=14, NotChecked=284, Total=1560 [2022-11-20 12:12:35,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-20 12:12:35,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 178 transitions, 949 flow. Second operand has 40 states, 40 states have (on average 79.05) internal successors, (3162), 40 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:35,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:35,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-20 12:12:35,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:37,749 INFO L130 PetriNetUnfolder]: 2940/8011 cut-off events. [2022-11-20 12:12:37,749 INFO L131 PetriNetUnfolder]: For 15231/15480 co-relation queries the response was YES. [2022-11-20 12:12:37,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22396 conditions, 8011 events. 2940/8011 cut-off events. For 15231/15480 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 82573 event pairs, 1084 based on Foata normal form. 4/6254 useless extension candidates. Maximal degree in co-relation 22265. Up to 1992 conditions per place. [2022-11-20 12:12:37,824 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 116 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2022-11-20 12:12:37,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 223 transitions, 1528 flow [2022-11-20 12:12:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:12:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-20 12:12:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1580 transitions. [2022-11-20 12:12:37,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5856189770200149 [2022-11-20 12:12:37,829 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1580 transitions. [2022-11-20 12:12:37,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1580 transitions. [2022-11-20 12:12:37,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:37,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1580 transitions. [2022-11-20 12:12:37,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.15789473684211) internal successors, (1580), 19 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:37,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:37,837 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:37,837 INFO L175 Difference]: Start difference. First operand has 196 places, 178 transitions, 949 flow. Second operand 19 states and 1580 transitions. [2022-11-20 12:12:37,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 223 transitions, 1528 flow [2022-11-20 12:12:37,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 223 transitions, 1504 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-20 12:12:37,865 INFO L231 Difference]: Finished difference. Result has 203 places, 179 transitions, 987 flow [2022-11-20 12:12:37,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=987, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2022-11-20 12:12:37,866 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 83 predicate places. [2022-11-20 12:12:37,866 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 987 flow [2022-11-20 12:12:37,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 79.05) internal successors, (3162), 40 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:37,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:37,867 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:37,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:38,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:12:38,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1437114282, now seen corresponding path program 1 times [2022-11-20 12:12:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:38,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124476263] [2022-11-20 12:12:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:38,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124476263] [2022-11-20 12:12:38,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124476263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:38,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037512546] [2022-11-20 12:12:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:38,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:38,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:38,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:38,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:12:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:12:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:38,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:38,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037512546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:38,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:38,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-20 12:12:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148302582] [2022-11-20 12:12:38,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:38,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 12:12:38,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 12:12:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:12:38,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 142 [2022-11-20 12:12:38,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 987 flow. Second operand has 24 states, 24 states have (on average 88.83333333333333) internal successors, (2132), 24 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:38,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:38,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 142 [2022-11-20 12:12:38,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:40,197 INFO L130 PetriNetUnfolder]: 1552/4863 cut-off events. [2022-11-20 12:12:40,197 INFO L131 PetriNetUnfolder]: For 7621/7756 co-relation queries the response was YES. [2022-11-20 12:12:40,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14063 conditions, 4863 events. 1552/4863 cut-off events. For 7621/7756 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 43035 event pairs, 915 based on Foata normal form. 16/3957 useless extension candidates. Maximal degree in co-relation 13935. Up to 2420 conditions per place. [2022-11-20 12:12:40,242 INFO L137 encePairwiseOnDemand]: 126/142 looper letters, 130 selfloop transitions, 23 changer transitions 5/241 dead transitions. [2022-11-20 12:12:40,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 241 transitions, 1501 flow [2022-11-20 12:12:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:12:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 12:12:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1591 transitions. [2022-11-20 12:12:40,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6590720795360397 [2022-11-20 12:12:40,247 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1591 transitions. [2022-11-20 12:12:40,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1591 transitions. [2022-11-20 12:12:40,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:40,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1591 transitions. [2022-11-20 12:12:40,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.58823529411765) internal successors, (1591), 17 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:40,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:40,255 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:40,255 INFO L175 Difference]: Start difference. First operand has 203 places, 179 transitions, 987 flow. Second operand 17 states and 1591 transitions. [2022-11-20 12:12:40,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 241 transitions, 1501 flow [2022-11-20 12:12:40,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 241 transitions, 1440 flow, removed 11 selfloop flow, removed 17 redundant places. [2022-11-20 12:12:40,295 INFO L231 Difference]: Finished difference. Result has 203 places, 169 transitions, 863 flow [2022-11-20 12:12:40,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=863, PETRI_PLACES=203, PETRI_TRANSITIONS=169} [2022-11-20 12:12:40,296 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 83 predicate places. [2022-11-20 12:12:40,296 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 169 transitions, 863 flow [2022-11-20 12:12:40,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.83333333333333) internal successors, (2132), 24 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:40,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:40,298 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:40,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:40,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:12:40,504 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -959802870, now seen corresponding path program 2 times [2022-11-20 12:12:40,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268100007] [2022-11-20 12:12:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:41,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:41,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268100007] [2022-11-20 12:12:41,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268100007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:41,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308955803] [2022-11-20 12:12:41,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:12:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:41,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:41,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:12:41,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:12:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:12:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 12:12:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:41,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:12:41,604 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:12:41,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 12:12:41,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:41,779 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 [2022-11-20 12:12:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:41,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:41,952 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_298 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_298) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-20 12:12:41,960 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_298 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_298) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-20 12:12:41,965 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_298 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_298) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2022-11-20 12:12:42,995 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 12:12:42,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-20 12:12:43,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:43,004 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 38 treesize of output 36 [2022-11-20 12:12:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 12:12:45,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308955803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:45,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:45,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-20 12:12:45,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864609303] [2022-11-20 12:12:45,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:45,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 12:12:45,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 12:12:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1395, Unknown=21, NotChecked=234, Total=1806 [2022-11-20 12:12:45,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-20 12:12:45,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 169 transitions, 863 flow. Second operand has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:45,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:45,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-20 12:12:45,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:48,839 INFO L130 PetriNetUnfolder]: 2842/7244 cut-off events. [2022-11-20 12:12:48,839 INFO L131 PetriNetUnfolder]: For 13648/14018 co-relation queries the response was YES. [2022-11-20 12:12:48,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21613 conditions, 7244 events. 2842/7244 cut-off events. For 13648/14018 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 65273 event pairs, 1044 based on Foata normal form. 95/5975 useless extension candidates. Maximal degree in co-relation 21476. Up to 2947 conditions per place. [2022-11-20 12:12:48,894 INFO L137 encePairwiseOnDemand]: 117/142 looper letters, 110 selfloop transitions, 55 changer transitions 0/231 dead transitions. [2022-11-20 12:12:48,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 1583 flow [2022-11-20 12:12:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 12:12:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 12:12:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2511 transitions. [2022-11-20 12:12:48,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5704225352112676 [2022-11-20 12:12:48,900 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2511 transitions. [2022-11-20 12:12:48,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2511 transitions. [2022-11-20 12:12:48,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:48,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2511 transitions. [2022-11-20 12:12:48,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 81.0) internal successors, (2511), 31 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:48,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 142.0) internal successors, (4544), 32 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:48,914 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 142.0) internal successors, (4544), 32 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:48,914 INFO L175 Difference]: Start difference. First operand has 203 places, 169 transitions, 863 flow. Second operand 31 states and 2511 transitions. [2022-11-20 12:12:48,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 1583 flow [2022-11-20 12:12:48,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 231 transitions, 1564 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-20 12:12:48,963 INFO L231 Difference]: Finished difference. Result has 235 places, 192 transitions, 1194 flow [2022-11-20 12:12:48,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1194, PETRI_PLACES=235, PETRI_TRANSITIONS=192} [2022-11-20 12:12:48,964 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 115 predicate places. [2022-11-20 12:12:48,964 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 192 transitions, 1194 flow [2022-11-20 12:12:48,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:48,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:48,966 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:48,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:49,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:12:49,171 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1606528545, now seen corresponding path program 1 times [2022-11-20 12:12:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:49,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514043175] [2022-11-20 12:12:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:49,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:12:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514043175] [2022-11-20 12:12:49,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514043175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:49,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:49,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:12:49,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80195129] [2022-11-20 12:12:49,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:49,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:12:49,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:12:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:12:49,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-20 12:12:49,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 192 transitions, 1194 flow. Second operand has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:49,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:49,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-20 12:12:49,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:50,395 INFO L130 PetriNetUnfolder]: 1982/5300 cut-off events. [2022-11-20 12:12:50,395 INFO L131 PetriNetUnfolder]: For 22816/23152 co-relation queries the response was YES. [2022-11-20 12:12:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19726 conditions, 5300 events. 1982/5300 cut-off events. For 22816/23152 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 49223 event pairs, 419 based on Foata normal form. 6/4169 useless extension candidates. Maximal degree in co-relation 19599. Up to 2424 conditions per place. [2022-11-20 12:12:50,441 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 78 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2022-11-20 12:12:50,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 231 transitions, 1716 flow [2022-11-20 12:12:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:12:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:12:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2022-11-20 12:12:50,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8309859154929577 [2022-11-20 12:12:50,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2022-11-20 12:12:50,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2022-11-20 12:12:50,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:50,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2022-11-20 12:12:50,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:50,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:50,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:50,446 INFO L175 Difference]: Start difference. First operand has 235 places, 192 transitions, 1194 flow. Second operand 5 states and 590 transitions. [2022-11-20 12:12:50,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 231 transitions, 1716 flow [2022-11-20 12:12:50,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 231 transitions, 1612 flow, removed 9 selfloop flow, removed 20 redundant places. [2022-11-20 12:12:50,474 INFO L231 Difference]: Finished difference. Result has 222 places, 195 transitions, 1152 flow [2022-11-20 12:12:50,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1152, PETRI_PLACES=222, PETRI_TRANSITIONS=195} [2022-11-20 12:12:50,475 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 102 predicate places. [2022-11-20 12:12:50,475 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 195 transitions, 1152 flow [2022-11-20 12:12:50,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:50,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:50,476 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:50,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:12:50,476 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash -959802867, now seen corresponding path program 2 times [2022-11-20 12:12:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:50,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75124270] [2022-11-20 12:12:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75124270] [2022-11-20 12:12:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75124270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:12:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835025860] [2022-11-20 12:12:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:12:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:12:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:12:51,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:12:51,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:12:51,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:12:51,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:12:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 12:12:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:12:51,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:12:51,526 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:12:51,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:12:51,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:12:51,697 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 14 treesize of output 16 [2022-11-20 12:12:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:12:51,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:12:51,847 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-20 12:12:51,860 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295)) is different from false [2022-11-20 12:12:51,921 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) is different from false [2022-11-20 12:12:54,180 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_36| Int) (v_ArrVal_337 Int)) (or (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_36| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_337)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295) (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_36| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)))) is different from false [2022-11-20 12:12:54,216 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 12:12:54,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-11-20 12:12:54,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:12:54,228 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 32 [2022-11-20 12:12:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 12:12:54,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835025860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:12:54,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:12:54,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-20 12:12:54,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618717243] [2022-11-20 12:12:54,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:12:54,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 12:12:54,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:54,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 12:12:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1328, Unknown=13, NotChecked=308, Total=1806 [2022-11-20 12:12:54,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2022-11-20 12:12:54,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 195 transitions, 1152 flow. Second operand has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:54,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:54,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2022-11-20 12:12:54,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:57,760 INFO L130 PetriNetUnfolder]: 3179/9164 cut-off events. [2022-11-20 12:12:57,760 INFO L131 PetriNetUnfolder]: For 22619/23162 co-relation queries the response was YES. [2022-11-20 12:12:57,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28440 conditions, 9164 events. 3179/9164 cut-off events. For 22619/23162 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 91708 event pairs, 1326 based on Foata normal form. 105/8091 useless extension candidates. Maximal degree in co-relation 28299. Up to 3419 conditions per place. [2022-11-20 12:12:57,841 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 93 selfloop transitions, 73 changer transitions 0/235 dead transitions. [2022-11-20 12:12:57,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 235 transitions, 1776 flow [2022-11-20 12:12:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:12:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 12:12:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1781 transitions. [2022-11-20 12:12:57,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5701024327784892 [2022-11-20 12:12:57,844 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1781 transitions. [2022-11-20 12:12:57,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1781 transitions. [2022-11-20 12:12:57,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:57,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1781 transitions. [2022-11-20 12:12:57,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 80.95454545454545) internal successors, (1781), 22 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:57,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:57,853 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:57,853 INFO L175 Difference]: Start difference. First operand has 222 places, 195 transitions, 1152 flow. Second operand 22 states and 1781 transitions. [2022-11-20 12:12:57,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 235 transitions, 1776 flow [2022-11-20 12:12:58,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 235 transitions, 1773 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:12:58,094 INFO L231 Difference]: Finished difference. Result has 244 places, 205 transitions, 1460 flow [2022-11-20 12:12:58,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1460, PETRI_PLACES=244, PETRI_TRANSITIONS=205} [2022-11-20 12:12:58,095 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 124 predicate places. [2022-11-20 12:12:58,095 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 205 transitions, 1460 flow [2022-11-20 12:12:58,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 79.53488372093024) internal successors, (3420), 43 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:58,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:58,097 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:58,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:12:58,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:12:58,303 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1470534958, now seen corresponding path program 1 times [2022-11-20 12:12:58,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178586305] [2022-11-20 12:12:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:58,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:12:58,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178586305] [2022-11-20 12:12:58,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178586305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:58,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:58,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:12:58,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601822185] [2022-11-20 12:12:58,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:58,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:12:58,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:12:58,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:12:58,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-20 12:12:58,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 205 transitions, 1460 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:58,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:58,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-20 12:12:58,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:12:59,629 INFO L130 PetriNetUnfolder]: 816/4156 cut-off events. [2022-11-20 12:12:59,629 INFO L131 PetriNetUnfolder]: For 13986/14145 co-relation queries the response was YES. [2022-11-20 12:12:59,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12880 conditions, 4156 events. 816/4156 cut-off events. For 13986/14145 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 43941 event pairs, 177 based on Foata normal form. 24/3876 useless extension candidates. Maximal degree in co-relation 12748. Up to 864 conditions per place. [2022-11-20 12:12:59,691 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 70 selfloop transitions, 20 changer transitions 0/253 dead transitions. [2022-11-20 12:12:59,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 253 transitions, 1992 flow [2022-11-20 12:12:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:12:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:12:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2022-11-20 12:12:59,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8718309859154929 [2022-11-20 12:12:59,693 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2022-11-20 12:12:59,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2022-11-20 12:12:59,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:12:59,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2022-11-20 12:12:59,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:59,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:59,696 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:59,696 INFO L175 Difference]: Start difference. First operand has 244 places, 205 transitions, 1460 flow. Second operand 5 states and 619 transitions. [2022-11-20 12:12:59,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 253 transitions, 1992 flow [2022-11-20 12:12:59,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 253 transitions, 1827 flow, removed 10 selfloop flow, removed 18 redundant places. [2022-11-20 12:12:59,733 INFO L231 Difference]: Finished difference. Result has 234 places, 216 transitions, 1526 flow [2022-11-20 12:12:59,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1526, PETRI_PLACES=234, PETRI_TRANSITIONS=216} [2022-11-20 12:12:59,734 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 114 predicate places. [2022-11-20 12:12:59,734 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 216 transitions, 1526 flow [2022-11-20 12:12:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:59,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:12:59,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:12:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:12:59,735 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:12:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:12:59,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1765079577, now seen corresponding path program 1 times [2022-11-20 12:12:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:12:59,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802583775] [2022-11-20 12:12:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:12:59,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:12:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:12:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:12:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:12:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802583775] [2022-11-20 12:12:59,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802583775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:12:59,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:12:59,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:12:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648345779] [2022-11-20 12:12:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:12:59,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:12:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:12:59,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:12:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:12:59,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-20 12:12:59,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 216 transitions, 1526 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:12:59,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:12:59,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-20 12:12:59,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:01,233 INFO L130 PetriNetUnfolder]: 711/3986 cut-off events. [2022-11-20 12:13:01,234 INFO L131 PetriNetUnfolder]: For 18501/18885 co-relation queries the response was YES. [2022-11-20 12:13:01,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12727 conditions, 3986 events. 711/3986 cut-off events. For 18501/18885 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 42222 event pairs, 144 based on Foata normal form. 204/4028 useless extension candidates. Maximal degree in co-relation 12600. Up to 708 conditions per place. [2022-11-20 12:13:01,294 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 75 selfloop transitions, 26 changer transitions 0/264 dead transitions. [2022-11-20 12:13:01,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 264 transitions, 2134 flow [2022-11-20 12:13:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:13:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:13:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2022-11-20 12:13:01,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8718309859154929 [2022-11-20 12:13:01,296 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2022-11-20 12:13:01,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2022-11-20 12:13:01,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:01,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2022-11-20 12:13:01,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:01,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:01,299 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:01,299 INFO L175 Difference]: Start difference. First operand has 234 places, 216 transitions, 1526 flow. Second operand 5 states and 619 transitions. [2022-11-20 12:13:01,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 264 transitions, 2134 flow [2022-11-20 12:13:01,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 264 transitions, 2134 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:13:01,334 INFO L231 Difference]: Finished difference. Result has 242 places, 229 transitions, 1831 flow [2022-11-20 12:13:01,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1831, PETRI_PLACES=242, PETRI_TRANSITIONS=229} [2022-11-20 12:13:01,335 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 122 predicate places. [2022-11-20 12:13:01,335 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 229 transitions, 1831 flow [2022-11-20 12:13:01,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:01,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:01,336 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:01,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:13:01,336 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1484174696, now seen corresponding path program 1 times [2022-11-20 12:13:01,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:01,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491541098] [2022-11-20 12:13:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:01,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:13:01,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491541098] [2022-11-20 12:13:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491541098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:13:01,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:13:01,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:13:01,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827365635] [2022-11-20 12:13:01,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:13:01,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:13:01,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:01,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:13:01,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:13:01,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-20 12:13:01,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 229 transitions, 1831 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:01,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:01,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-20 12:13:01,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:02,392 INFO L130 PetriNetUnfolder]: 667/3762 cut-off events. [2022-11-20 12:13:02,392 INFO L131 PetriNetUnfolder]: For 20460/20898 co-relation queries the response was YES. [2022-11-20 12:13:02,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12210 conditions, 3762 events. 667/3762 cut-off events. For 20460/20898 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 38807 event pairs, 150 based on Foata normal form. 246/3871 useless extension candidates. Maximal degree in co-relation 12077. Up to 745 conditions per place. [2022-11-20 12:13:02,418 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 69 selfloop transitions, 10 changer transitions 0/242 dead transitions. [2022-11-20 12:13:02,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 242 transitions, 1957 flow [2022-11-20 12:13:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:13:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:13:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2022-11-20 12:13:02,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8549295774647887 [2022-11-20 12:13:02,420 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2022-11-20 12:13:02,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2022-11-20 12:13:02,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:02,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2022-11-20 12:13:02,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:02,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:02,423 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:02,423 INFO L175 Difference]: Start difference. First operand has 242 places, 229 transitions, 1831 flow. Second operand 5 states and 607 transitions. [2022-11-20 12:13:02,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 242 transitions, 1957 flow [2022-11-20 12:13:02,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 242 transitions, 1957 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:13:02,462 INFO L231 Difference]: Finished difference. Result has 246 places, 217 transitions, 1640 flow [2022-11-20 12:13:02,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1640, PETRI_PLACES=246, PETRI_TRANSITIONS=217} [2022-11-20 12:13:02,463 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 126 predicate places. [2022-11-20 12:13:02,463 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 217 transitions, 1640 flow [2022-11-20 12:13:02,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:02,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:02,464 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:02,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:13:02,464 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:02,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1484174697, now seen corresponding path program 1 times [2022-11-20 12:13:02,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:02,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365362327] [2022-11-20 12:13:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:02,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:13:02,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:02,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365362327] [2022-11-20 12:13:02,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365362327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:13:02,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:13:02,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:13:02,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827881967] [2022-11-20 12:13:02,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:13:02,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:13:02,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:13:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:13:02,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-20 12:13:02,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 217 transitions, 1640 flow. Second operand has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:02,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:02,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-20 12:13:02,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:03,245 INFO L130 PetriNetUnfolder]: 569/3300 cut-off events. [2022-11-20 12:13:03,246 INFO L131 PetriNetUnfolder]: For 16236/16432 co-relation queries the response was YES. [2022-11-20 12:13:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10522 conditions, 3300 events. 569/3300 cut-off events. For 16236/16432 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 32806 event pairs, 95 based on Foata normal form. 197/3379 useless extension candidates. Maximal degree in co-relation 10385. Up to 524 conditions per place. [2022-11-20 12:13:03,274 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 54 selfloop transitions, 9 changer transitions 0/226 dead transitions. [2022-11-20 12:13:03,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 226 transitions, 1690 flow [2022-11-20 12:13:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:13:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:13:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-11-20 12:13:03,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.852112676056338 [2022-11-20 12:13:03,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-11-20 12:13:03,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-11-20 12:13:03,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:03,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-11-20 12:13:03,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:03,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:03,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:03,279 INFO L175 Difference]: Start difference. First operand has 246 places, 217 transitions, 1640 flow. Second operand 5 states and 605 transitions. [2022-11-20 12:13:03,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 226 transitions, 1690 flow [2022-11-20 12:13:03,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 226 transitions, 1626 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-11-20 12:13:03,315 INFO L231 Difference]: Finished difference. Result has 240 places, 201 transitions, 1333 flow [2022-11-20 12:13:03,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1333, PETRI_PLACES=240, PETRI_TRANSITIONS=201} [2022-11-20 12:13:03,316 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 120 predicate places. [2022-11-20 12:13:03,317 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 201 transitions, 1333 flow [2022-11-20 12:13:03,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:03,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:03,317 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:03,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 12:13:03,318 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash -377995027, now seen corresponding path program 2 times [2022-11-20 12:13:03,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:03,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725807617] [2022-11-20 12:13:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:04,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:04,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725807617] [2022-11-20 12:13:04,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725807617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:04,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136511814] [2022-11-20 12:13:04,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:13:04,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:04,058 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:04,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:13:04,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:13:04,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:13:04,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 12:13:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:04,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:13:04,629 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:13:04,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:13:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:04,838 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 14 treesize of output 16 [2022-11-20 12:13:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:04,959 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 14 treesize of output 16 [2022-11-20 12:13:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:04,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:05,111 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-20 12:13:07,767 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 Int) (v_ArrVal_421 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| Int) (v_ArrVal_420 (Array Int Int))) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_418)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_421) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295))) is different from false [2022-11-20 12:13:07,807 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 12:13:07,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2022-11-20 12:13:07,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:07,818 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 126 treesize of output 120 [2022-11-20 12:13:07,823 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 106 treesize of output 98 [2022-11-20 12:13:07,829 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 98 treesize of output 94 [2022-11-20 12:13:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 12:13:08,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136511814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:08,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:08,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-20 12:13:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455418755] [2022-11-20 12:13:08,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:08,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 12:13:08,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:08,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 12:13:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1852, Unknown=43, NotChecked=178, Total=2256 [2022-11-20 12:13:08,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-20 12:13:08,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 201 transitions, 1333 flow. Second operand has 48 states, 48 states have (on average 77.33333333333333) internal successors, (3712), 48 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:08,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:08,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-20 12:13:08,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:11,872 INFO L130 PetriNetUnfolder]: 2450/8152 cut-off events. [2022-11-20 12:13:11,872 INFO L131 PetriNetUnfolder]: For 24076/24485 co-relation queries the response was YES. [2022-11-20 12:13:11,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25333 conditions, 8152 events. 2450/8152 cut-off events. For 24076/24485 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 85014 event pairs, 1029 based on Foata normal form. 142/7746 useless extension candidates. Maximal degree in co-relation 25179. Up to 1596 conditions per place. [2022-11-20 12:13:11,952 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 98 selfloop transitions, 55 changer transitions 0/226 dead transitions. [2022-11-20 12:13:11,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 226 transitions, 1781 flow [2022-11-20 12:13:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:13:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 12:13:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1726 transitions. [2022-11-20 12:13:11,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5524967989756722 [2022-11-20 12:13:11,956 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1726 transitions. [2022-11-20 12:13:11,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1726 transitions. [2022-11-20 12:13:11,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:11,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1726 transitions. [2022-11-20 12:13:11,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.45454545454545) internal successors, (1726), 22 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:11,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:11,964 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:11,964 INFO L175 Difference]: Start difference. First operand has 240 places, 201 transitions, 1333 flow. Second operand 22 states and 1726 transitions. [2022-11-20 12:13:11,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 226 transitions, 1781 flow [2022-11-20 12:13:12,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 226 transitions, 1753 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:13:12,014 INFO L231 Difference]: Finished difference. Result has 259 places, 202 transitions, 1472 flow [2022-11-20 12:13:12,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1472, PETRI_PLACES=259, PETRI_TRANSITIONS=202} [2022-11-20 12:13:12,015 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 139 predicate places. [2022-11-20 12:13:12,016 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 202 transitions, 1472 flow [2022-11-20 12:13:12,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 77.33333333333333) internal successors, (3712), 48 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:12,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:12,017 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:12,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:13:12,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 12:13:12,222 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:12,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1704682216, now seen corresponding path program 2 times [2022-11-20 12:13:12,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:12,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12786308] [2022-11-20 12:13:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:12,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:12,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:12,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12786308] [2022-11-20 12:13:12,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12786308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:12,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808048518] [2022-11-20 12:13:12,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:13:12,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:12,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:12,955 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:12,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:13:13,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:13:13,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:13:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:13:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:13,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:13:13,515 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:13:13,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 12:13:13,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:13,742 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 [2022-11-20 12:13:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:13,866 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 [2022-11-20 12:13:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:13,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:13,949 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_455 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-11-20 12:13:14,014 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_455 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-20 12:13:14,028 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_455 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_455) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-20 12:13:17,662 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 12:13:17,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-20 12:13:17,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:17,674 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 142 treesize of output 136 [2022-11-20 12:13:17,681 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 61 treesize of output 57 [2022-11-20 12:13:17,687 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 118 treesize of output 110 [2022-11-20 12:13:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808048518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:20,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:20,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-20 12:13:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814343751] [2022-11-20 12:13:20,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:20,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 12:13:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 12:13:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1769, Unknown=37, NotChecked=264, Total=2256 [2022-11-20 12:13:20,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-20 12:13:20,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 202 transitions, 1472 flow. Second operand has 48 states, 48 states have (on average 77.33333333333333) internal successors, (3712), 48 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:20,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:20,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-20 12:13:20,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:23,906 INFO L130 PetriNetUnfolder]: 2259/7308 cut-off events. [2022-11-20 12:13:23,906 INFO L131 PetriNetUnfolder]: For 27701/28033 co-relation queries the response was YES. [2022-11-20 12:13:23,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23768 conditions, 7308 events. 2259/7308 cut-off events. For 27701/28033 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 74749 event pairs, 961 based on Foata normal form. 142/6931 useless extension candidates. Maximal degree in co-relation 23602. Up to 1545 conditions per place. [2022-11-20 12:13:23,959 INFO L137 encePairwiseOnDemand]: 121/142 looper letters, 98 selfloop transitions, 52 changer transitions 0/223 dead transitions. [2022-11-20 12:13:23,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 223 transitions, 1869 flow [2022-11-20 12:13:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:13:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:13:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1650 transitions. [2022-11-20 12:13:23,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5533199195171026 [2022-11-20 12:13:23,962 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1650 transitions. [2022-11-20 12:13:23,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1650 transitions. [2022-11-20 12:13:23,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:23,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1650 transitions. [2022-11-20 12:13:23,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.57142857142857) internal successors, (1650), 21 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:23,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:23,969 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:23,970 INFO L175 Difference]: Start difference. First operand has 259 places, 202 transitions, 1472 flow. Second operand 21 states and 1650 transitions. [2022-11-20 12:13:23,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 223 transitions, 1869 flow [2022-11-20 12:13:24,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 223 transitions, 1749 flow, removed 2 selfloop flow, removed 22 redundant places. [2022-11-20 12:13:24,028 INFO L231 Difference]: Finished difference. Result has 257 places, 199 transitions, 1428 flow [2022-11-20 12:13:24,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1428, PETRI_PLACES=257, PETRI_TRANSITIONS=199} [2022-11-20 12:13:24,029 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 137 predicate places. [2022-11-20 12:13:24,029 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 199 transitions, 1428 flow [2022-11-20 12:13:24,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 77.33333333333333) internal successors, (3712), 48 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:24,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:24,030 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:24,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:13:24,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:24,236 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1349062719, now seen corresponding path program 1 times [2022-11-20 12:13:24,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:24,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258392830] [2022-11-20 12:13:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:24,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:24,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258392830] [2022-11-20 12:13:24,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258392830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529206198] [2022-11-20 12:13:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:24,439 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:24,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:13:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:13:24,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:24,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:25,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529206198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:25,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:25,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-20 12:13:25,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687186126] [2022-11-20 12:13:25,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:25,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 12:13:25,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 12:13:25,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:13:25,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 142 [2022-11-20 12:13:25,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 199 transitions, 1428 flow. Second operand has 24 states, 24 states have (on average 88.875) internal successors, (2133), 24 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:25,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:25,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 142 [2022-11-20 12:13:25,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:26,575 INFO L130 PetriNetUnfolder]: 1403/4471 cut-off events. [2022-11-20 12:13:26,576 INFO L131 PetriNetUnfolder]: For 19013/19126 co-relation queries the response was YES. [2022-11-20 12:13:26,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15526 conditions, 4471 events. 1403/4471 cut-off events. For 19013/19126 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 40951 event pairs, 905 based on Foata normal form. 38/4189 useless extension candidates. Maximal degree in co-relation 15369. Up to 2673 conditions per place. [2022-11-20 12:13:26,618 INFO L137 encePairwiseOnDemand]: 126/142 looper letters, 66 selfloop transitions, 14 changer transitions 62/243 dead transitions. [2022-11-20 12:13:26,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 243 transitions, 1943 flow [2022-11-20 12:13:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:13:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 12:13:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1558 transitions. [2022-11-20 12:13:26,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6454018227009114 [2022-11-20 12:13:26,621 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1558 transitions. [2022-11-20 12:13:26,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1558 transitions. [2022-11-20 12:13:26,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:26,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1558 transitions. [2022-11-20 12:13:26,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.6470588235294) internal successors, (1558), 17 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:26,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:26,625 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:26,625 INFO L175 Difference]: Start difference. First operand has 257 places, 199 transitions, 1428 flow. Second operand 17 states and 1558 transitions. [2022-11-20 12:13:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 243 transitions, 1943 flow [2022-11-20 12:13:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 243 transitions, 1853 flow, removed 2 selfloop flow, removed 20 redundant places. [2022-11-20 12:13:26,648 INFO L231 Difference]: Finished difference. Result has 254 places, 171 transitions, 1108 flow [2022-11-20 12:13:26,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1108, PETRI_PLACES=254, PETRI_TRANSITIONS=171} [2022-11-20 12:13:26,648 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 134 predicate places. [2022-11-20 12:13:26,648 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 171 transitions, 1108 flow [2022-11-20 12:13:26,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.875) internal successors, (2133), 24 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:26,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:26,649 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:26,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:13:26,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 12:13:26,850 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1772825951, now seen corresponding path program 2 times [2022-11-20 12:13:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:26,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142490115] [2022-11-20 12:13:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:27,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142490115] [2022-11-20 12:13:27,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142490115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:27,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314427568] [2022-11-20 12:13:27,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:13:27,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:27,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:27,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:27,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:13:27,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:13:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:13:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:13:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:28,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:13:28,529 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:13:28,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 12:13:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:28,797 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 [2022-11-20 12:13:28,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:28,870 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 [2022-11-20 12:13:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:28,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:30,456 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 12:13:30,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-20 12:13:30,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:30,468 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 142 treesize of output 136 [2022-11-20 12:13:30,474 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 122 treesize of output 114 [2022-11-20 12:13:30,479 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 114 treesize of output 110 [2022-11-20 12:13:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:32,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314427568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:32,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:32,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-20 12:13:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228849237] [2022-11-20 12:13:32,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:32,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 12:13:32,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 12:13:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2006, Unknown=50, NotChecked=0, Total=2256 [2022-11-20 12:13:32,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-20 12:13:32,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 171 transitions, 1108 flow. Second operand has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:32,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:32,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-20 12:13:32,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:36,329 INFO L130 PetriNetUnfolder]: 1821/5668 cut-off events. [2022-11-20 12:13:36,329 INFO L131 PetriNetUnfolder]: For 26827/27105 co-relation queries the response was YES. [2022-11-20 12:13:36,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18733 conditions, 5668 events. 1821/5668 cut-off events. For 26827/27105 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 57397 event pairs, 733 based on Foata normal form. 166/5526 useless extension candidates. Maximal degree in co-relation 18681. Up to 1258 conditions per place. [2022-11-20 12:13:36,391 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 120 selfloop transitions, 31 changer transitions 0/228 dead transitions. [2022-11-20 12:13:36,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 228 transitions, 1845 flow [2022-11-20 12:13:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:13:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 12:13:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1915 transitions. [2022-11-20 12:13:36,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5619131455399061 [2022-11-20 12:13:36,395 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1915 transitions. [2022-11-20 12:13:36,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1915 transitions. [2022-11-20 12:13:36,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:36,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1915 transitions. [2022-11-20 12:13:36,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.79166666666667) internal successors, (1915), 24 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:36,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:36,403 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:36,403 INFO L175 Difference]: Start difference. First operand has 254 places, 171 transitions, 1108 flow. Second operand 24 states and 1915 transitions. [2022-11-20 12:13:36,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 228 transitions, 1845 flow [2022-11-20 12:13:36,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 228 transitions, 1643 flow, removed 17 selfloop flow, removed 30 redundant places. [2022-11-20 12:13:36,453 INFO L231 Difference]: Finished difference. Result has 228 places, 179 transitions, 1093 flow [2022-11-20 12:13:36,453 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1093, PETRI_PLACES=228, PETRI_TRANSITIONS=179} [2022-11-20 12:13:36,453 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 108 predicate places. [2022-11-20 12:13:36,454 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 179 transitions, 1093 flow [2022-11-20 12:13:36,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:36,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:36,455 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:36,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:13:36,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 12:13:36,661 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1772825954, now seen corresponding path program 2 times [2022-11-20 12:13:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:36,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768964259] [2022-11-20 12:13:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:37,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:37,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768964259] [2022-11-20 12:13:37,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768964259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:37,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351023170] [2022-11-20 12:13:37,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:13:37,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:37,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:37,379 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:37,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:13:37,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:13:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:13:37,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:13:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:37,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:13:37,944 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-20 12:13:37,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 12:13:38,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:38,185 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 14 treesize of output 16 [2022-11-20 12:13:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:38,245 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 14 treesize of output 16 [2022-11-20 12:13:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:38,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:38,423 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_547 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_547) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-20 12:13:41,472 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-20 12:13:41,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2022-11-20 12:13:41,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:41,482 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 64 treesize of output 62 [2022-11-20 12:13:41,485 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 48 treesize of output 44 [2022-11-20 12:13:41,491 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 22 treesize of output 20 [2022-11-20 12:13:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:43,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351023170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:43,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:43,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-20 12:13:43,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850722008] [2022-11-20 12:13:43,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:43,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 12:13:43,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 12:13:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1921, Unknown=51, NotChecked=90, Total=2256 [2022-11-20 12:13:43,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 142 [2022-11-20 12:13:43,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 179 transitions, 1093 flow. Second operand has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:43,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:43,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 142 [2022-11-20 12:13:43,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:46,870 INFO L130 PetriNetUnfolder]: 1749/5524 cut-off events. [2022-11-20 12:13:46,870 INFO L131 PetriNetUnfolder]: For 17949/18213 co-relation queries the response was YES. [2022-11-20 12:13:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17518 conditions, 5524 events. 1749/5524 cut-off events. For 17949/18213 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 56158 event pairs, 549 based on Foata normal form. 198/5440 useless extension candidates. Maximal degree in co-relation 17478. Up to 1418 conditions per place. [2022-11-20 12:13:46,913 INFO L137 encePairwiseOnDemand]: 120/142 looper letters, 83 selfloop transitions, 38 changer transitions 0/198 dead transitions. [2022-11-20 12:13:46,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 198 transitions, 1471 flow [2022-11-20 12:13:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:13:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 12:13:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1724 transitions. [2022-11-20 12:13:46,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5518565941101152 [2022-11-20 12:13:46,916 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1724 transitions. [2022-11-20 12:13:46,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1724 transitions. [2022-11-20 12:13:46,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:46,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1724 transitions. [2022-11-20 12:13:46,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.36363636363636) internal successors, (1724), 22 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:46,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:46,923 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:46,923 INFO L175 Difference]: Start difference. First operand has 228 places, 179 transitions, 1093 flow. Second operand 22 states and 1724 transitions. [2022-11-20 12:13:46,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 198 transitions, 1471 flow [2022-11-20 12:13:46,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 198 transitions, 1433 flow, removed 1 selfloop flow, removed 18 redundant places. [2022-11-20 12:13:46,957 INFO L231 Difference]: Finished difference. Result has 233 places, 179 transitions, 1150 flow [2022-11-20 12:13:46,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1150, PETRI_PLACES=233, PETRI_TRANSITIONS=179} [2022-11-20 12:13:46,958 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 113 predicate places. [2022-11-20 12:13:46,959 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 179 transitions, 1150 flow [2022-11-20 12:13:46,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 77.39583333333333) internal successors, (3715), 48 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:46,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:46,960 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:46,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:13:47,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 12:13:47,162 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash 965574777, now seen corresponding path program 1 times [2022-11-20 12:13:47,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340156234] [2022-11-20 12:13:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:47,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:48,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340156234] [2022-11-20 12:13:48,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340156234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870367734] [2022-11-20 12:13:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:48,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:48,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:48,010 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:48,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:13:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 12:13:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:48,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:13:48,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:48,634 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 [2022-11-20 12:13:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:48,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:49,155 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967295)) is different from false [2022-11-20 12:13:49,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:49,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 12:13:49,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:49,198 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 38 treesize of output 34 [2022-11-20 12:13:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 12:13:49,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870367734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:49,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:49,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-20 12:13:49,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765229808] [2022-11-20 12:13:49,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:49,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 12:13:49,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 12:13:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1882, Unknown=20, NotChecked=88, Total=2162 [2022-11-20 12:13:49,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-20 12:13:49,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 179 transitions, 1150 flow. Second operand has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:49,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:49,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-20 12:13:49,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:13:53,638 INFO L130 PetriNetUnfolder]: 2919/8297 cut-off events. [2022-11-20 12:13:53,638 INFO L131 PetriNetUnfolder]: For 22148/22747 co-relation queries the response was YES. [2022-11-20 12:13:53,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28238 conditions, 8297 events. 2919/8297 cut-off events. For 22148/22747 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 85125 event pairs, 1603 based on Foata normal form. 484/8164 useless extension candidates. Maximal degree in co-relation 28197. Up to 3226 conditions per place. [2022-11-20 12:13:53,710 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 117 selfloop transitions, 54 changer transitions 0/237 dead transitions. [2022-11-20 12:13:53,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 237 transitions, 1811 flow [2022-11-20 12:13:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 12:13:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-20 12:13:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2221 transitions. [2022-11-20 12:13:53,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5393394851869839 [2022-11-20 12:13:53,714 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2221 transitions. [2022-11-20 12:13:53,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2221 transitions. [2022-11-20 12:13:53,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:13:53,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2221 transitions. [2022-11-20 12:13:53,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 76.58620689655173) internal successors, (2221), 29 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:53,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 142.0) internal successors, (4260), 30 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:53,723 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 142.0) internal successors, (4260), 30 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:53,723 INFO L175 Difference]: Start difference. First operand has 233 places, 179 transitions, 1150 flow. Second operand 29 states and 2221 transitions. [2022-11-20 12:13:53,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 237 transitions, 1811 flow [2022-11-20 12:13:53,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 237 transitions, 1747 flow, removed 2 selfloop flow, removed 19 redundant places. [2022-11-20 12:13:53,811 INFO L231 Difference]: Finished difference. Result has 247 places, 193 transitions, 1345 flow [2022-11-20 12:13:53,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1345, PETRI_PLACES=247, PETRI_TRANSITIONS=193} [2022-11-20 12:13:53,812 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 127 predicate places. [2022-11-20 12:13:53,812 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 193 transitions, 1345 flow [2022-11-20 12:13:53,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:53,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:13:53,813 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:13:53,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:13:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 12:13:54,013 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:13:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:13:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash 965574774, now seen corresponding path program 2 times [2022-11-20 12:13:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:13:54,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006437872] [2022-11-20 12:13:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:13:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:13:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:13:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:54,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:13:54,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006437872] [2022-11-20 12:13:54,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006437872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:13:54,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179946938] [2022-11-20 12:13:54,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:13:54,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:13:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:54,782 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:13:54,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:13:54,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:13:54,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:13:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 12:13:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:13:55,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:13:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:13:55,420 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 [2022-11-20 12:13:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:13:55,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:13:55,765 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_601) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-20 12:13:55,780 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_601) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-20 12:13:55,865 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_601) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-11-20 12:13:55,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:55,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-20 12:13:55,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:13:55,905 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 42 treesize of output 38 [2022-11-20 12:13:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-20 12:13:56,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179946938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:13:56,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:13:56,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-20 12:13:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908661191] [2022-11-20 12:13:56,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:13:56,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 12:13:56,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:13:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 12:13:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1723, Unknown=12, NotChecked=258, Total=2162 [2022-11-20 12:13:56,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 142 [2022-11-20 12:13:56,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 193 transitions, 1345 flow. Second operand has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:13:56,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:13:56,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 142 [2022-11-20 12:13:56,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:00,734 INFO L130 PetriNetUnfolder]: 2916/8219 cut-off events. [2022-11-20 12:14:00,735 INFO L131 PetriNetUnfolder]: For 23069/23668 co-relation queries the response was YES. [2022-11-20 12:14:00,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28215 conditions, 8219 events. 2916/8219 cut-off events. For 23069/23668 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 84012 event pairs, 1599 based on Foata normal form. 484/8086 useless extension candidates. Maximal degree in co-relation 28169. Up to 3225 conditions per place. [2022-11-20 12:14:00,802 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 128 selfloop transitions, 51 changer transitions 0/245 dead transitions. [2022-11-20 12:14:00,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 245 transitions, 1946 flow [2022-11-20 12:14:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 12:14:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 12:14:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2152 transitions. [2022-11-20 12:14:00,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5412474849094567 [2022-11-20 12:14:00,806 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2152 transitions. [2022-11-20 12:14:00,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2152 transitions. [2022-11-20 12:14:00,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:00,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2152 transitions. [2022-11-20 12:14:00,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:00,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:00,813 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:00,813 INFO L175 Difference]: Start difference. First operand has 247 places, 193 transitions, 1345 flow. Second operand 28 states and 2152 transitions. [2022-11-20 12:14:00,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 245 transitions, 1946 flow [2022-11-20 12:14:00,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 245 transitions, 1850 flow, removed 6 selfloop flow, removed 17 redundant places. [2022-11-20 12:14:00,868 INFO L231 Difference]: Finished difference. Result has 257 places, 191 transitions, 1328 flow [2022-11-20 12:14:00,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1328, PETRI_PLACES=257, PETRI_TRANSITIONS=191} [2022-11-20 12:14:00,869 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 137 predicate places. [2022-11-20 12:14:00,869 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 191 transitions, 1328 flow [2022-11-20 12:14:00,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.76595744680851) internal successors, (3514), 47 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:00,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:00,870 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:00,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 12:14:01,076 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:14:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2042862662, now seen corresponding path program 1 times [2022-11-20 12:14:01,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:01,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304702184] [2022-11-20 12:14:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:01,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:14:01,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:01,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304702184] [2022-11-20 12:14:01,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304702184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:01,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847596905] [2022-11-20 12:14:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:01,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:01,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:01,183 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:01,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:14:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:14:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:14:01,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:14:01,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847596905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:01,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:01,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 12:14:01,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656112990] [2022-11-20 12:14:01,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:01,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:14:01,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:14:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:14:01,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-20 12:14:01,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 191 transitions, 1328 flow. Second operand has 12 states, 12 states have (on average 109.66666666666667) internal successors, (1316), 12 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:01,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:01,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-20 12:14:01,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:03,728 INFO L130 PetriNetUnfolder]: 2803/8634 cut-off events. [2022-11-20 12:14:03,729 INFO L131 PetriNetUnfolder]: For 30124/31146 co-relation queries the response was YES. [2022-11-20 12:14:03,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33028 conditions, 8634 events. 2803/8634 cut-off events. For 30124/31146 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 91998 event pairs, 291 based on Foata normal form. 1018/9060 useless extension candidates. Maximal degree in co-relation 32982. Up to 1553 conditions per place. [2022-11-20 12:14:03,804 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 223 selfloop transitions, 34 changer transitions 0/397 dead transitions. [2022-11-20 12:14:03,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 397 transitions, 3457 flow [2022-11-20 12:14:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:14:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 12:14:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2056 transitions. [2022-11-20 12:14:03,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8043818466353677 [2022-11-20 12:14:03,807 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2056 transitions. [2022-11-20 12:14:03,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2056 transitions. [2022-11-20 12:14:03,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:03,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2056 transitions. [2022-11-20 12:14:03,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.22222222222223) internal successors, (2056), 18 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:03,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:03,813 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:03,814 INFO L175 Difference]: Start difference. First operand has 257 places, 191 transitions, 1328 flow. Second operand 18 states and 2056 transitions. [2022-11-20 12:14:03,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 397 transitions, 3457 flow [2022-11-20 12:14:03,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 397 transitions, 3309 flow, removed 3 selfloop flow, removed 26 redundant places. [2022-11-20 12:14:03,867 INFO L231 Difference]: Finished difference. Result has 252 places, 211 transitions, 1532 flow [2022-11-20 12:14:03,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1532, PETRI_PLACES=252, PETRI_TRANSITIONS=211} [2022-11-20 12:14:03,868 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 132 predicate places. [2022-11-20 12:14:03,868 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 211 transitions, 1532 flow [2022-11-20 12:14:03,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 109.66666666666667) internal successors, (1316), 12 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:03,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:03,869 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:03,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:04,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 12:14:04,075 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:14:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1786961977, now seen corresponding path program 2 times [2022-11-20 12:14:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:04,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635867913] [2022-11-20 12:14:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:04,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:04,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635867913] [2022-11-20 12:14:04,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635867913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:04,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060088821] [2022-11-20 12:14:04,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:14:04,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:04,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:04,243 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:04,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:14:04,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:14:04,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:14:04,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 12:14:04,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 12:14:04,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060088821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:04,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:04,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 12:14:04,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618344499] [2022-11-20 12:14:04,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:04,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:14:04,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:14:04,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:14:04,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 142 [2022-11-20 12:14:04,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 211 transitions, 1532 flow. Second operand has 18 states, 18 states have (on average 94.61111111111111) internal successors, (1703), 18 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:04,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:04,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 142 [2022-11-20 12:14:04,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:07,904 INFO L130 PetriNetUnfolder]: 2999/13118 cut-off events. [2022-11-20 12:14:07,905 INFO L131 PetriNetUnfolder]: For 44274/44519 co-relation queries the response was YES. [2022-11-20 12:14:08,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43983 conditions, 13118 events. 2999/13118 cut-off events. For 44274/44519 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 151923 event pairs, 2022 based on Foata normal form. 22/12747 useless extension candidates. Maximal degree in co-relation 43935. Up to 1183 conditions per place. [2022-11-20 12:14:08,083 INFO L137 encePairwiseOnDemand]: 131/142 looper letters, 141 selfloop transitions, 25 changer transitions 0/308 dead transitions. [2022-11-20 12:14:08,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 308 transitions, 2569 flow [2022-11-20 12:14:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:14:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 12:14:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2311 transitions. [2022-11-20 12:14:08,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6781103286384976 [2022-11-20 12:14:08,087 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2311 transitions. [2022-11-20 12:14:08,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2311 transitions. [2022-11-20 12:14:08,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:08,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2311 transitions. [2022-11-20 12:14:08,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.29166666666667) internal successors, (2311), 24 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:08,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:08,095 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:08,095 INFO L175 Difference]: Start difference. First operand has 252 places, 211 transitions, 1532 flow. Second operand 24 states and 2311 transitions. [2022-11-20 12:14:08,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 308 transitions, 2569 flow [2022-11-20 12:14:08,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 308 transitions, 2479 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-11-20 12:14:08,456 INFO L231 Difference]: Finished difference. Result has 266 places, 215 transitions, 1519 flow [2022-11-20 12:14:08,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1519, PETRI_PLACES=266, PETRI_TRANSITIONS=215} [2022-11-20 12:14:08,456 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 146 predicate places. [2022-11-20 12:14:08,457 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 215 transitions, 1519 flow [2022-11-20 12:14:08,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.61111111111111) internal successors, (1703), 18 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:08,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:08,457 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:08,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:08,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:08,658 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:14:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1095766306, now seen corresponding path program 1 times [2022-11-20 12:14:08,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:08,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641871906] [2022-11-20 12:14:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:08,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:14:08,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641871906] [2022-11-20 12:14:08,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641871906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691652310] [2022-11-20 12:14:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:08,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:08,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:08,762 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:08,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 12:14:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:14:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:14:08,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:14:08,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691652310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:08,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:14:08,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 12:14:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969196156] [2022-11-20 12:14:08,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:08,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:14:08,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:14:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:14:08,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 142 [2022-11-20 12:14:08,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 215 transitions, 1519 flow. Second operand has 6 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:08,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:08,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 142 [2022-11-20 12:14:08,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:12,494 INFO L130 PetriNetUnfolder]: 4247/13369 cut-off events. [2022-11-20 12:14:12,494 INFO L131 PetriNetUnfolder]: For 44035/45454 co-relation queries the response was YES. [2022-11-20 12:14:12,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51647 conditions, 13369 events. 4247/13369 cut-off events. For 44035/45454 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 150403 event pairs, 366 based on Foata normal form. 1682/14079 useless extension candidates. Maximal degree in co-relation 51603. Up to 3815 conditions per place. [2022-11-20 12:14:12,618 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 99 selfloop transitions, 18 changer transitions 0/261 dead transitions. [2022-11-20 12:14:12,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 261 transitions, 2080 flow [2022-11-20 12:14:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:14:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 12:14:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 797 transitions. [2022-11-20 12:14:12,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8018108651911469 [2022-11-20 12:14:12,620 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 797 transitions. [2022-11-20 12:14:12,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 797 transitions. [2022-11-20 12:14:12,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:12,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 797 transitions. [2022-11-20 12:14:12,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:12,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 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) [2022-11-20 12:14:12,623 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 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) [2022-11-20 12:14:12,623 INFO L175 Difference]: Start difference. First operand has 266 places, 215 transitions, 1519 flow. Second operand 7 states and 797 transitions. [2022-11-20 12:14:12,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 261 transitions, 2080 flow [2022-11-20 12:14:12,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 261 transitions, 2027 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-20 12:14:12,819 INFO L231 Difference]: Finished difference. Result has 250 places, 211 transitions, 1483 flow [2022-11-20 12:14:12,819 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1483, PETRI_PLACES=250, PETRI_TRANSITIONS=211} [2022-11-20 12:14:12,820 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 130 predicate places. [2022-11-20 12:14:12,820 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 211 transitions, 1483 flow [2022-11-20 12:14:12,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:12,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:12,820 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:12,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:13,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:13,021 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:14:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash -953225161, now seen corresponding path program 1 times [2022-11-20 12:14:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:13,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782772052] [2022-11-20 12:14:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:13,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:14,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:14,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782772052] [2022-11-20 12:14:14,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782772052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:14,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340270015] [2022-11-20 12:14:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:14,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:14,130 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:14,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 12:14:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:14,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 12:14:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:14,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:14:14,424 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:14:14,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:14:14,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:14:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:14:15,018 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 [2022-11-20 12:14:15,157 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 [2022-11-20 12:14:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:15,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:15,615 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-20 12:14:15,633 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 4294967295)) is different from false [2022-11-20 12:14:15,643 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 4294967295)) is different from false [2022-11-20 12:14:15,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:15,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-20 12:14:15,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:15,776 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 142 treesize of output 132 [2022-11-20 12:14:15,784 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 59 treesize of output 51 [2022-11-20 12:14:15,789 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 110 treesize of output 94 [2022-11-20 12:14:16,509 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 10 treesize of output 8 [2022-11-20 12:14:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:16,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340270015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:16,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:16,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-20 12:14:16,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661665929] [2022-11-20 12:14:16,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:16,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:14:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:16,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:14:16,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2157, Unknown=23, NotChecked=288, Total=2652 [2022-11-20 12:14:16,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-20 12:14:16,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 211 transitions, 1483 flow. Second operand has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:16,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:16,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-20 12:14:16,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:27,048 INFO L130 PetriNetUnfolder]: 11977/34834 cut-off events. [2022-11-20 12:14:27,048 INFO L131 PetriNetUnfolder]: For 101944/104162 co-relation queries the response was YES. [2022-11-20 12:14:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120622 conditions, 34834 events. 11977/34834 cut-off events. For 101944/104162 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 426224 event pairs, 5493 based on Foata normal form. 1829/34462 useless extension candidates. Maximal degree in co-relation 120578. Up to 10845 conditions per place. [2022-11-20 12:14:27,414 INFO L137 encePairwiseOnDemand]: 119/142 looper letters, 193 selfloop transitions, 66 changer transitions 0/322 dead transitions. [2022-11-20 12:14:27,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 322 transitions, 2741 flow [2022-11-20 12:14:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 12:14:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 12:14:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1843 transitions. [2022-11-20 12:14:27,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5191549295774648 [2022-11-20 12:14:27,417 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1843 transitions. [2022-11-20 12:14:27,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1843 transitions. [2022-11-20 12:14:27,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:27,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1843 transitions. [2022-11-20 12:14:27,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 73.72) internal successors, (1843), 25 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:27,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 142.0) internal successors, (3692), 26 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:27,424 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 142.0) internal successors, (3692), 26 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:27,424 INFO L175 Difference]: Start difference. First operand has 250 places, 211 transitions, 1483 flow. Second operand 25 states and 1843 transitions. [2022-11-20 12:14:27,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 322 transitions, 2741 flow [2022-11-20 12:14:27,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 322 transitions, 2692 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 12:14:27,707 INFO L231 Difference]: Finished difference. Result has 275 places, 230 transitions, 1903 flow [2022-11-20 12:14:27,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1903, PETRI_PLACES=275, PETRI_TRANSITIONS=230} [2022-11-20 12:14:27,708 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 155 predicate places. [2022-11-20 12:14:27,708 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 230 transitions, 1903 flow [2022-11-20 12:14:27,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:27,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:27,709 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:27,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-20 12:14:27,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 12:14:27,910 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:14:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash -466319180, now seen corresponding path program 1 times [2022-11-20 12:14:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:27,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193295227] [2022-11-20 12:14:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:27,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:29,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193295227] [2022-11-20 12:14:29,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193295227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758546538] [2022-11-20 12:14:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:29,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:29,102 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:29,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 12:14:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:29,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 12:14:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:29,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:14:29,356 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:14:29,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:14:29,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:14:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:14:29,930 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 18 treesize of output 20 [2022-11-20 12:14:30,062 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 [2022-11-20 12:14:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:30,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:30,348 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_747 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-20 12:14:30,373 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_747 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-11-20 12:14:30,581 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (v_ArrVal_747 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_746) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-20 12:14:30,588 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_746 (Array Int Int)) (v_ArrVal_747 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_746) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-11-20 12:14:30,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:30,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 12:14:30,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:30,635 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 158 treesize of output 148 [2022-11-20 12:14:30,641 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 134 treesize of output 118 [2022-11-20 12:14:30,648 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 63 treesize of output 55 [2022-11-20 12:14:31,340 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 10 treesize of output 8 [2022-11-20 12:14:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-20 12:14:31,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758546538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:31,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:31,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-20 12:14:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585806989] [2022-11-20 12:14:31,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:14:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:14:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2080, Unknown=16, NotChecked=380, Total=2652 [2022-11-20 12:14:31,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-20 12:14:31,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 230 transitions, 1903 flow. Second operand has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:31,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:31,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-20 12:14:31,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:43,717 INFO L130 PetriNetUnfolder]: 11996/34869 cut-off events. [2022-11-20 12:14:43,717 INFO L131 PetriNetUnfolder]: For 118169/120382 co-relation queries the response was YES. [2022-11-20 12:14:44,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122805 conditions, 34869 events. 11996/34869 cut-off events. For 118169/120382 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 425972 event pairs, 5559 based on Foata normal form. 1820/34472 useless extension candidates. Maximal degree in co-relation 122755. Up to 10884 conditions per place. [2022-11-20 12:14:44,446 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 199 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2022-11-20 12:14:44,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 327 transitions, 2936 flow [2022-11-20 12:14:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 12:14:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 12:14:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1982 transitions. [2022-11-20 12:14:44,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5169535732916014 [2022-11-20 12:14:44,451 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1982 transitions. [2022-11-20 12:14:44,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1982 transitions. [2022-11-20 12:14:44,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:44,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1982 transitions. [2022-11-20 12:14:44,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.4074074074074) internal successors, (1982), 27 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:44,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:44,461 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:44,461 INFO L175 Difference]: Start difference. First operand has 275 places, 230 transitions, 1903 flow. Second operand 27 states and 1982 transitions. [2022-11-20 12:14:44,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 327 transitions, 2936 flow [2022-11-20 12:14:44,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 327 transitions, 2865 flow, removed 5 selfloop flow, removed 16 redundant places. [2022-11-20 12:14:44,840 INFO L231 Difference]: Finished difference. Result has 285 places, 230 transitions, 1962 flow [2022-11-20 12:14:44,840 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1962, PETRI_PLACES=285, PETRI_TRANSITIONS=230} [2022-11-20 12:14:44,841 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 165 predicate places. [2022-11-20 12:14:44,841 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 230 transitions, 1962 flow [2022-11-20 12:14:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 69.61538461538461) internal successors, (3620), 52 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:44,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:44,842 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:44,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:45,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:45,042 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:14:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1278539891, now seen corresponding path program 2 times [2022-11-20 12:14:45,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:45,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744875273] [2022-11-20 12:14:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:46,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744875273] [2022-11-20 12:14:46,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744875273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:46,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393148846] [2022-11-20 12:14:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:14:46,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:46,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:46,110 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:46,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 12:14:46,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:14:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 12:14:46,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:46,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:14:47,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:14:47,004 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 [2022-11-20 12:14:47,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:14:47,084 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 [2022-11-20 12:14:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:47,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:48,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:48,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 12:14:48,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:48,128 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 80 treesize of output 76 [2022-11-20 12:14:48,134 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 28 [2022-11-20 12:14:48,140 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 58 treesize of output 50 [2022-11-20 12:14:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:48,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393148846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:48,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:48,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-20 12:14:48,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723825566] [2022-11-20 12:14:48,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:48,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:14:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:14:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2422, Unknown=26, NotChecked=0, Total=2652 [2022-11-20 12:14:48,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 142 [2022-11-20 12:14:48,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 230 transitions, 1962 flow. Second operand has 52 states, 52 states have (on average 72.61538461538461) internal successors, (3776), 52 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:48,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:48,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 142 [2022-11-20 12:14:48,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:00,941 INFO L130 PetriNetUnfolder]: 14951/33987 cut-off events. [2022-11-20 12:15:00,941 INFO L131 PetriNetUnfolder]: For 273874/274967 co-relation queries the response was YES. [2022-11-20 12:15:01,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130002 conditions, 33987 events. 14951/33987 cut-off events. For 273874/274967 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 394984 event pairs, 6120 based on Foata normal form. 177/30826 useless extension candidates. Maximal degree in co-relation 129952. Up to 10948 conditions per place. [2022-11-20 12:15:01,559 INFO L137 encePairwiseOnDemand]: 118/142 looper letters, 185 selfloop transitions, 35 changer transitions 0/323 dead transitions. [2022-11-20 12:15:01,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 323 transitions, 3173 flow [2022-11-20 12:15:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 12:15:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 12:15:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2120 transitions. [2022-11-20 12:15:01,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5331991951710262 [2022-11-20 12:15:01,564 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2120 transitions. [2022-11-20 12:15:01,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2120 transitions. [2022-11-20 12:15:01,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:01,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2120 transitions. [2022-11-20 12:15:01,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 75.71428571428571) internal successors, (2120), 28 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:01,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:01,574 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 142.0) internal successors, (4118), 29 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:01,574 INFO L175 Difference]: Start difference. First operand has 285 places, 230 transitions, 1962 flow. Second operand 28 states and 2120 transitions. [2022-11-20 12:15:01,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 323 transitions, 3173 flow [2022-11-20 12:15:02,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 323 transitions, 3063 flow, removed 7 selfloop flow, removed 22 redundant places. [2022-11-20 12:15:02,034 INFO L231 Difference]: Finished difference. Result has 294 places, 235 transitions, 2020 flow [2022-11-20 12:15:02,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2020, PETRI_PLACES=294, PETRI_TRANSITIONS=235} [2022-11-20 12:15:02,035 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 174 predicate places. [2022-11-20 12:15:02,035 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 235 transitions, 2020 flow [2022-11-20 12:15:02,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 72.61538461538461) internal successors, (3776), 52 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:02,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:02,036 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:02,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-20 12:15:02,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 12:15:02,237 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-20 12:15:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1278539894, now seen corresponding path program 1 times [2022-11-20 12:15:02,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:02,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700226335] [2022-11-20 12:15:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:02,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:03,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700226335] [2022-11-20 12:15:03,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700226335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894859738] [2022-11-20 12:15:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:03,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:03,506 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:03,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43c29f9-5e3c-471d-8032-58ab3bd2f993/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 12:15:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 12:15:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:03,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:15:03,811 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:15:03,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:15:04,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:15:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:04,351 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 [2022-11-20 12:15:04,420 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 [2022-11-20 12:15:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:04,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:04,803 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_812 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_812) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456)) is different from false [2022-11-20 12:15:05,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:05,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-20 12:15:05,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:05,282 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 142 treesize of output 132 [2022-11-20 12:15:05,288 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 118 treesize of output 102 [2022-11-20 12:15:05,294 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 102 treesize of output 94 [2022-11-20 12:15:06,117 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 10 treesize of output 8 [2022-11-20 12:15:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:06,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894859738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:06,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:06,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-20 12:15:06,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91535870] [2022-11-20 12:15:06,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:06,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:15:06,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:15:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2327, Unknown=26, NotChecked=98, Total=2652 [2022-11-20 12:15:06,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 142 [2022-11-20 12:15:06,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 235 transitions, 2020 flow. Second operand has 52 states, 52 states have (on average 69.67307692307692) internal successors, (3623), 52 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:06,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:06,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 142 [2022-11-20 12:15:06,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand