./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8 --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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --- 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-e04fb08 [2022-11-16 11:49:41,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:49:41,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:49:41,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:49:41,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:49:41,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:49:41,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:49:41,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:49:41,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:49:41,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:49:41,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:49:41,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:49:41,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:49:41,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:49:41,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:49:41,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:49:41,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:49:41,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:49:41,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:49:41,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:49:41,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:49:41,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:49:41,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:49:41,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:49:41,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:49:41,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:49:41,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:49:41,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:49:41,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:49:41,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:49:41,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:49:41,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:49:41,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:49:41,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:49:41,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:49:41,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:49:41,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:49:41,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:49:41,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:49:41,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:49:41,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:49:41,226 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:49:41,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:49:41,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:49:41,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:49:41,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:49:41,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:49:41,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:49:41,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:49:41,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:49:41,270 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:49:41,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:49:41,272 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:49:41,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:49:41,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:49:41,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:49:41,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:49:41,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:49:41,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:49:41,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:49:41,274 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:49:41,274 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:49:41,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:49:41,274 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:49:41,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:49:41,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:49:41,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:49:41,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:49:41,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:49:41,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:49:41,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:49:41,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:49:41,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:49:41,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:49:41,277 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:49:41,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:49:41,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:49:41,278 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_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f [2022-11-16 11:49:41,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:49:41,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:49:41,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:49:41,700 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:49:41,701 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:49:41,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-16 11:49:41,799 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/data/91690f91e/76a3c84bcc8149e9b2822b6825c16593/FLAG5ce9ab080 [2022-11-16 11:49:42,447 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:49:42,448 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-16 11:49:42,458 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/data/91690f91e/76a3c84bcc8149e9b2822b6825c16593/FLAG5ce9ab080 [2022-11-16 11:49:42,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/data/91690f91e/76a3c84bcc8149e9b2822b6825c16593 [2022-11-16 11:49:42,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:49:42,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:49:42,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:49:42,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:49:42,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:49:42,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:49:42" (1/1) ... [2022-11-16 11:49:42,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f22c7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:42, skipping insertion in model container [2022-11-16 11:49:42,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:49:42" (1/1) ... [2022-11-16 11:49:42,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:49:42,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:49:43,100 WARN L229 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_f273b05e-7fa9-4ad5-87f2-93bc086c5619/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-16 11:49:43,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:49:43,118 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:49:43,145 WARN L229 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_f273b05e-7fa9-4ad5-87f2-93bc086c5619/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-16 11:49:43,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:49:43,167 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:49:43,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43 WrapperNode [2022-11-16 11:49:43,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:49:43,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:49:43,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:49:43,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:49:43,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,219 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 230 [2022-11-16 11:49:43,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:49:43,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:49:43,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:49:43,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:49:43,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,251 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:49:43,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:49:43,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:49:43,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:49:43,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (1/1) ... [2022-11-16 11:49:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:49:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:43,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:49:43,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:49:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:49:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:49:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:49:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:49:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:49:43,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:49:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:49:43,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:49:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:49:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:49:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:49:43,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:49:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:49:43,387 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:49:43,553 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:49:43,556 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:49:44,129 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:49:44,146 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:49:44,146 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:49:44,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:49:44 BoogieIcfgContainer [2022-11-16 11:49:44,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:49:44,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:49:44,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:49:44,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:49:44,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:49:42" (1/3) ... [2022-11-16 11:49:44,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eaf81db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:49:44, skipping insertion in model container [2022-11-16 11:49:44,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:43" (2/3) ... [2022-11-16 11:49:44,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eaf81db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:49:44, skipping insertion in model container [2022-11-16 11:49:44,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:49:44" (3/3) ... [2022-11-16 11:49:44,165 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2022-11-16 11:49:44,176 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:49:44,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:49:44,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-16 11:49:44,189 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:49:44,362 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:49:44,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 321 transitions, 658 flow [2022-11-16 11:49:44,575 INFO L130 PetriNetUnfolder]: 25/319 cut-off events. [2022-11-16 11:49:44,575 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:49:44,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 319 events. 25/319 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 538 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2022-11-16 11:49:44,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 321 transitions, 658 flow [2022-11-16 11:49:44,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 284 transitions, 577 flow [2022-11-16 11:49:44,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:49:44,612 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;@6cdd62f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:49:44,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-16 11:49:44,625 INFO L130 PetriNetUnfolder]: 3/56 cut-off events. [2022-11-16 11:49:44,626 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:49:44,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:44,627 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] [2022-11-16 11:49:44,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:44,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1917978742, now seen corresponding path program 1 times [2022-11-16 11:49:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:44,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574162340] [2022-11-16 11:49:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:44,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:45,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:45,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574162340] [2022-11-16 11:49:45,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574162340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:45,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:45,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:49:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414853225] [2022-11-16 11:49:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:45,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:49:45,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:49:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:49:45,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-16 11:49:45,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 284 transitions, 577 flow. Second operand has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:45,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:45,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-16 11:49:45,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:45,576 INFO L130 PetriNetUnfolder]: 15/474 cut-off events. [2022-11-16 11:49:45,576 INFO L131 PetriNetUnfolder]: For 10/12 co-relation queries the response was YES. [2022-11-16 11:49:45,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 474 events. 15/474 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1443 event pairs, 0 based on Foata normal form. 26/432 useless extension candidates. Maximal degree in co-relation 357. Up to 29 conditions per place. [2022-11-16 11:49:45,586 INFO L137 encePairwiseOnDemand]: 294/321 looper letters, 38 selfloop transitions, 9 changer transitions 4/290 dead transitions. [2022-11-16 11:49:45,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 290 transitions, 692 flow [2022-11-16 11:49:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:49:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:49:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1450 transitions. [2022-11-16 11:49:45,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9034267912772586 [2022-11-16 11:49:45,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1450 transitions. [2022-11-16 11:49:45,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1450 transitions. [2022-11-16 11:49:45,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:45,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1450 transitions. [2022-11-16 11:49:45,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:45,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:45,651 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:45,653 INFO L175 Difference]: Start difference. First operand has 269 places, 284 transitions, 577 flow. Second operand 5 states and 1450 transitions. [2022-11-16 11:49:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 290 transitions, 692 flow [2022-11-16 11:49:45,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 290 transitions, 682 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:49:45,673 INFO L231 Difference]: Finished difference. Result has 273 places, 273 transitions, 603 flow [2022-11-16 11:49:45,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=603, PETRI_PLACES=273, PETRI_TRANSITIONS=273} [2022-11-16 11:49:45,680 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 4 predicate places. [2022-11-16 11:49:45,681 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 273 transitions, 603 flow [2022-11-16 11:49:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:45,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:45,683 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] [2022-11-16 11:49:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:49:45,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:45,686 INFO L85 PathProgramCache]: Analyzing trace with hash -128227480, now seen corresponding path program 1 times [2022-11-16 11:49:45,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:45,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426322953] [2022-11-16 11:49:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:45,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:45,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:45,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426322953] [2022-11-16 11:49:45,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426322953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:45,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751389463] [2022-11-16 11:49:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:45,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:45,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:45,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:45,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:49:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:49:46,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:46,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751389463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:46,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:46,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:49:46,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418964789] [2022-11-16 11:49:46,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:49:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:49:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:49:46,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-16 11:49:46,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 273 transitions, 603 flow. Second operand has 12 states, 12 states have (on average 277.6666666666667) internal successors, (3332), 12 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:46,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:46,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-16 11:49:46,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:46,980 INFO L130 PetriNetUnfolder]: 36/1086 cut-off events. [2022-11-16 11:49:46,980 INFO L131 PetriNetUnfolder]: For 32/37 co-relation queries the response was YES. [2022-11-16 11:49:46,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 1086 events. 36/1086 cut-off events. For 32/37 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5644 event pairs, 0 based on Foata normal form. 6/942 useless extension candidates. Maximal degree in co-relation 820. Up to 22 conditions per place. [2022-11-16 11:49:46,996 INFO L137 encePairwiseOnDemand]: 306/321 looper letters, 71 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2022-11-16 11:49:46,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 350 transitions, 1045 flow [2022-11-16 11:49:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:49:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:49:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5067 transitions. [2022-11-16 11:49:47,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8769470404984424 [2022-11-16 11:49:47,007 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5067 transitions. [2022-11-16 11:49:47,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5067 transitions. [2022-11-16 11:49:47,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:47,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5067 transitions. [2022-11-16 11:49:47,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 281.5) internal successors, (5067), 18 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:47,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 321.0) internal successors, (6099), 19 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:47,039 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 321.0) internal successors, (6099), 19 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:47,039 INFO L175 Difference]: Start difference. First operand has 273 places, 273 transitions, 603 flow. Second operand 18 states and 5067 transitions. [2022-11-16 11:49:47,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 350 transitions, 1045 flow [2022-11-16 11:49:47,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 350 transitions, 1040 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:49:47,049 INFO L231 Difference]: Finished difference. Result has 289 places, 300 transitions, 836 flow [2022-11-16 11:49:47,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=836, PETRI_PLACES=289, PETRI_TRANSITIONS=300} [2022-11-16 11:49:47,050 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 20 predicate places. [2022-11-16 11:49:47,051 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 300 transitions, 836 flow [2022-11-16 11:49:47,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 277.6666666666667) internal successors, (3332), 12 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:47,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:47,054 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] [2022-11-16 11:49:47,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:49:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:47,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash 319915979, now seen corresponding path program 1 times [2022-11-16 11:49:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130847940] [2022-11-16 11:49:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130847940] [2022-11-16 11:49:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130847940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264557322] [2022-11-16 11:49:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:47,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:47,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:47,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:49:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:47,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:49:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:47,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:49:47,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264557322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:47,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:49:47,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:49:47,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584907378] [2022-11-16 11:49:47,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:47,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:49:47,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:47,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:49:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:49:47,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-16 11:49:47,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 300 transitions, 836 flow. Second operand has 6 states, 6 states have (on average 277.3333333333333) internal successors, (1664), 6 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:47,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:47,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-16 11:49:47,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:48,011 INFO L130 PetriNetUnfolder]: 36/1078 cut-off events. [2022-11-16 11:49:48,012 INFO L131 PetriNetUnfolder]: For 126/131 co-relation queries the response was YES. [2022-11-16 11:49:48,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 1078 events. 36/1078 cut-off events. For 126/131 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5616 event pairs, 0 based on Foata normal form. 8/936 useless extension candidates. Maximal degree in co-relation 1013. Up to 44 conditions per place. [2022-11-16 11:49:48,029 INFO L137 encePairwiseOnDemand]: 310/321 looper letters, 39 selfloop transitions, 27 changer transitions 0/305 dead transitions. [2022-11-16 11:49:48,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 305 transitions, 948 flow [2022-11-16 11:49:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:49:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:49:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1972 transitions. [2022-11-16 11:49:48,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8776145972407655 [2022-11-16 11:49:48,035 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1972 transitions. [2022-11-16 11:49:48,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1972 transitions. [2022-11-16 11:49:48,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:48,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1972 transitions. [2022-11-16 11:49:48,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 281.7142857142857) internal successors, (1972), 7 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:48,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:48,051 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:48,051 INFO L175 Difference]: Start difference. First operand has 289 places, 300 transitions, 836 flow. Second operand 7 states and 1972 transitions. [2022-11-16 11:49:48,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 305 transitions, 948 flow [2022-11-16 11:49:48,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 305 transitions, 874 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-16 11:49:48,068 INFO L231 Difference]: Finished difference. Result has 284 places, 292 transitions, 762 flow [2022-11-16 11:49:48,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=762, PETRI_PLACES=284, PETRI_TRANSITIONS=292} [2022-11-16 11:49:48,069 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 15 predicate places. [2022-11-16 11:49:48,069 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 292 transitions, 762 flow [2022-11-16 11:49:48,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 277.3333333333333) internal successors, (1664), 6 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:48,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:48,071 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] [2022-11-16 11:49:48,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:49:48,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:48,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash -456402698, now seen corresponding path program 2 times [2022-11-16 11:49:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:48,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767115576] [2022-11-16 11:49:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:48,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767115576] [2022-11-16 11:49:48,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767115576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:48,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75053008] [2022-11-16 11:49:48,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:49:48,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:48,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:48,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:48,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:49:48,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:49:48,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:49:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:49:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:49:48,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:49:49,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75053008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:49,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:49,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-11-16 11:49:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924285708] [2022-11-16 11:49:49,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:49,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:49:49,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:49:49,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:49:49,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 321 [2022-11-16 11:49:49,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 292 transitions, 762 flow. Second operand has 18 states, 18 states have (on average 269.0) internal successors, (4842), 18 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:49,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:49,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 321 [2022-11-16 11:49:49,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:50,008 INFO L130 PetriNetUnfolder]: 43/1266 cut-off events. [2022-11-16 11:49:50,008 INFO L131 PetriNetUnfolder]: For 114/120 co-relation queries the response was YES. [2022-11-16 11:49:50,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 1266 events. 43/1266 cut-off events. For 114/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 7003 event pairs, 0 based on Foata normal form. 2/1088 useless extension candidates. Maximal degree in co-relation 1020. Up to 14 conditions per place. [2022-11-16 11:49:50,029 INFO L137 encePairwiseOnDemand]: 305/321 looper letters, 83 selfloop transitions, 43 changer transitions 0/355 dead transitions. [2022-11-16 11:49:50,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 355 transitions, 1170 flow [2022-11-16 11:49:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:49:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 11:49:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5428 transitions. [2022-11-16 11:49:50,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8454828660436137 [2022-11-16 11:49:50,044 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5428 transitions. [2022-11-16 11:49:50,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5428 transitions. [2022-11-16 11:49:50,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:50,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5428 transitions. [2022-11-16 11:49:50,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 271.4) internal successors, (5428), 20 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 321.0) internal successors, (6741), 21 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,089 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 321.0) internal successors, (6741), 21 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,089 INFO L175 Difference]: Start difference. First operand has 284 places, 292 transitions, 762 flow. Second operand 20 states and 5428 transitions. [2022-11-16 11:49:50,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 355 transitions, 1170 flow [2022-11-16 11:49:50,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 355 transitions, 1117 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-16 11:49:50,098 INFO L231 Difference]: Finished difference. Result has 293 places, 295 transitions, 808 flow [2022-11-16 11:49:50,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=808, PETRI_PLACES=293, PETRI_TRANSITIONS=295} [2022-11-16 11:49:50,109 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 24 predicate places. [2022-11-16 11:49:50,109 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 295 transitions, 808 flow [2022-11-16 11:49:50,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 269.0) internal successors, (4842), 18 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:50,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:50,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:50,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:50,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1112198204, now seen corresponding path program 1 times [2022-11-16 11:49:50,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:50,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838217434] [2022-11-16 11:49:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:50,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:50,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:50,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838217434] [2022-11-16 11:49:50,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838217434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:50,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:50,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:49:50,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586927336] [2022-11-16 11:49:50,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:49:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:49:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:49:50,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-16 11:49:50,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 295 transitions, 808 flow. Second operand has 5 states, 5 states have (on average 278.4) internal successors, (1392), 5 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:50,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-16 11:49:50,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:50,892 INFO L130 PetriNetUnfolder]: 36/1080 cut-off events. [2022-11-16 11:49:50,893 INFO L131 PetriNetUnfolder]: For 148/153 co-relation queries the response was YES. [2022-11-16 11:49:50,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1080 events. 36/1080 cut-off events. For 148/153 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5430 event pairs, 0 based on Foata normal form. 2/942 useless extension candidates. Maximal degree in co-relation 203. Up to 74 conditions per place. [2022-11-16 11:49:50,910 INFO L137 encePairwiseOnDemand]: 311/321 looper letters, 41 selfloop transitions, 12 changer transitions 0/298 dead transitions. [2022-11-16 11:49:50,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 298 transitions, 919 flow [2022-11-16 11:49:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:49:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:49:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1412 transitions. [2022-11-16 11:49:50,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8797507788161993 [2022-11-16 11:49:50,915 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1412 transitions. [2022-11-16 11:49:50,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1412 transitions. [2022-11-16 11:49:50,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:50,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1412 transitions. [2022-11-16 11:49:50,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 282.4) internal successors, (1412), 5 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,924 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,924 INFO L175 Difference]: Start difference. First operand has 293 places, 295 transitions, 808 flow. Second operand 5 states and 1412 transitions. [2022-11-16 11:49:50,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 298 transitions, 919 flow [2022-11-16 11:49:50,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 298 transitions, 828 flow, removed 4 selfloop flow, removed 15 redundant places. [2022-11-16 11:49:50,932 INFO L231 Difference]: Finished difference. Result has 283 places, 294 transitions, 742 flow [2022-11-16 11:49:50,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=742, PETRI_PLACES=283, PETRI_TRANSITIONS=294} [2022-11-16 11:49:50,934 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 14 predicate places. [2022-11-16 11:49:50,934 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 294 transitions, 742 flow [2022-11-16 11:49:50,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.4) internal successors, (1392), 5 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:50,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:50,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:50,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:49:50,936 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:50,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1555439820, now seen corresponding path program 1 times [2022-11-16 11:49:50,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:50,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304188856] [2022-11-16 11:49:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:50,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304188856] [2022-11-16 11:49:51,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304188856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103131869] [2022-11-16 11:49:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:51,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:51,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:51,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:51,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:49:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:49:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:51,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:51,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103131869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:51,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:51,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-16 11:49:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484414262] [2022-11-16 11:49:51,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:51,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:49:51,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:49:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:49:51,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 321 [2022-11-16 11:49:51,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 294 transitions, 742 flow. Second operand has 15 states, 15 states have (on average 268.6666666666667) internal successors, (4030), 15 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:51,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:51,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 321 [2022-11-16 11:49:51,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:51,969 INFO L130 PetriNetUnfolder]: 22/708 cut-off events. [2022-11-16 11:49:51,969 INFO L131 PetriNetUnfolder]: For 44/47 co-relation queries the response was YES. [2022-11-16 11:49:51,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 708 events. 22/708 cut-off events. For 44/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2634 event pairs, 0 based on Foata normal form. 4/628 useless extension candidates. Maximal degree in co-relation 648. Up to 38 conditions per place. [2022-11-16 11:49:51,979 INFO L137 encePairwiseOnDemand]: 305/321 looper letters, 51 selfloop transitions, 30 changer transitions 0/310 dead transitions. [2022-11-16 11:49:51,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 310 transitions, 946 flow [2022-11-16 11:49:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:49:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:49:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2982 transitions. [2022-11-16 11:49:51,987 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8445199660152931 [2022-11-16 11:49:51,987 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2982 transitions. [2022-11-16 11:49:51,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2982 transitions. [2022-11-16 11:49:51,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:51,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2982 transitions. [2022-11-16 11:49:51,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 271.09090909090907) internal successors, (2982), 11 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) [2022-11-16 11:49:52,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 321.0) internal successors, (3852), 12 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:52,004 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 321.0) internal successors, (3852), 12 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:52,004 INFO L175 Difference]: Start difference. First operand has 283 places, 294 transitions, 742 flow. Second operand 11 states and 2982 transitions. [2022-11-16 11:49:52,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 310 transitions, 946 flow [2022-11-16 11:49:52,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 310 transitions, 926 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:49:52,012 INFO L231 Difference]: Finished difference. Result has 292 places, 294 transitions, 821 flow [2022-11-16 11:49:52,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=821, PETRI_PLACES=292, PETRI_TRANSITIONS=294} [2022-11-16 11:49:52,013 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 23 predicate places. [2022-11-16 11:49:52,013 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 294 transitions, 821 flow [2022-11-16 11:49:52,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 268.6666666666667) internal successors, (4030), 15 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:52,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:52,016 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:52,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:52,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:52,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:52,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:52,223 INFO L85 PathProgramCache]: Analyzing trace with hash -994690636, now seen corresponding path program 2 times [2022-11-16 11:49:52,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:52,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442894698] [2022-11-16 11:49:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:49:52,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442894698] [2022-11-16 11:49:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442894698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467684409] [2022-11-16 11:49:52,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:49:52,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:52,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:52,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:52,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:49:52,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:49:52,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:49:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:49:52,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:49:53,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:49:53,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467684409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:53,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:49:53,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-16 11:49:53,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864536215] [2022-11-16 11:49:53,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:53,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:49:53,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:53,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:49:53,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:49:53,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 321 [2022-11-16 11:49:53,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 294 transitions, 821 flow. Second operand has 22 states, 22 states have (on average 268.77272727272725) internal successors, (5913), 22 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:53,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:49:53,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 321 [2022-11-16 11:49:53,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:53,816 INFO L130 PetriNetUnfolder]: 8/336 cut-off events. [2022-11-16 11:49:53,816 INFO L131 PetriNetUnfolder]: For 102/103 co-relation queries the response was YES. [2022-11-16 11:49:53,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 336 events. 8/336 cut-off events. For 102/103 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 336 event pairs, 0 based on Foata normal form. 4/312 useless extension candidates. Maximal degree in co-relation 192. Up to 18 conditions per place. [2022-11-16 11:49:53,821 INFO L137 encePairwiseOnDemand]: 305/321 looper letters, 57 selfloop transitions, 34 changer transitions 0/320 dead transitions. [2022-11-16 11:49:53,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 320 transitions, 1085 flow [2022-11-16 11:49:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:49:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 11:49:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4600 transitions. [2022-11-16 11:49:53,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8429540040315191 [2022-11-16 11:49:53,833 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4600 transitions. [2022-11-16 11:49:53,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4600 transitions. [2022-11-16 11:49:53,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:49:53,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4600 transitions. [2022-11-16 11:49:53,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 270.5882352941176) internal successors, (4600), 17 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:53,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 321.0) internal successors, (5778), 18 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:53,861 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 321.0) internal successors, (5778), 18 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:53,862 INFO L175 Difference]: Start difference. First operand has 292 places, 294 transitions, 821 flow. Second operand 17 states and 4600 transitions. [2022-11-16 11:49:53,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 320 transitions, 1085 flow [2022-11-16 11:49:53,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 320 transitions, 1030 flow, removed 6 selfloop flow, removed 9 redundant places. [2022-11-16 11:49:53,873 INFO L231 Difference]: Finished difference. Result has 301 places, 292 transitions, 848 flow [2022-11-16 11:49:53,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=848, PETRI_PLACES=301, PETRI_TRANSITIONS=292} [2022-11-16 11:49:53,875 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 32 predicate places. [2022-11-16 11:49:53,876 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 292 transitions, 848 flow [2022-11-16 11:49:53,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 268.77272727272725) internal successors, (5913), 22 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:49:53,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:49:53,879 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:53,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:54,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:54,086 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:49:54,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash -973220812, now seen corresponding path program 3 times [2022-11-16 11:49:54,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:54,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342413479] [2022-11-16 11:49:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:54,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 27 proven. 68 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 11:49:57,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342413479] [2022-11-16 11:49:57,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342413479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:57,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623510581] [2022-11-16 11:49:57,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:49:57,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:57,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:57,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:57,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:49:57,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:49:57,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:49:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:49:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:57,824 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 [2022-11-16 11:49:58,005 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 11:49:58,008 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 28 [2022-11-16 11:49:58,377 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 11:49:58,377 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 27 treesize of output 32 [2022-11-16 11:49:58,707 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 11:49:58,708 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 27 treesize of output 32 [2022-11-16 11:49:59,004 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 11:49:59,004 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 27 treesize of output 32 [2022-11-16 11:49:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:49:59,576 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 [2022-11-16 11:49:59,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:49:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 11:49:59,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:59,945 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_233 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_233) c_~o_2~0.base) c_~o_2~0.offset) 9223372039002259456)) is different from false [2022-11-16 11:50:00,098 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_233 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_233) |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 [2022-11-16 11:50:00,105 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_233 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_233) |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 [2022-11-16 11:50:38,637 INFO L321 Elim1Store]: treesize reduction 280, result has 34.1 percent of original size [2022-11-16 11:50:38,637 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 5 case distinctions, treesize of input 50 treesize of output 155 [2022-11-16 11:50:38,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:50:38,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 230 [2022-11-16 11:50:39,046 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 5 treesize of output 3 [2022-11-16 11:50:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 11:50:41,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623510581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:41,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:41,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 30] total 73 [2022-11-16 11:50:41,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541385500] [2022-11-16 11:50:41,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:41,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 11:50:41,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 11:50:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4509, Unknown=26, NotChecked=420, Total=5402 [2022-11-16 11:50:41,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 321 [2022-11-16 11:50:41,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 292 transitions, 848 flow. Second operand has 74 states, 74 states have (on average 209.47297297297297) internal successors, (15501), 74 states have internal predecessors, (15501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:41,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:50:41,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 321 [2022-11-16 11:50:41,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:50:46,196 INFO L130 PetriNetUnfolder]: 996/4440 cut-off events. [2022-11-16 11:50:46,196 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-11-16 11:50:46,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6507 conditions, 4440 events. 996/4440 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 39032 event pairs, 168 based on Foata normal form. 0/3669 useless extension candidates. Maximal degree in co-relation 6081. Up to 451 conditions per place. [2022-11-16 11:50:46,248 INFO L137 encePairwiseOnDemand]: 287/321 looper letters, 261 selfloop transitions, 62 changer transitions 0/495 dead transitions. [2022-11-16 11:50:46,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 495 transitions, 1925 flow [2022-11-16 11:50:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:50:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 11:50:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 8544 transitions. [2022-11-16 11:50:46,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6654205607476635 [2022-11-16 11:50:46,268 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 8544 transitions. [2022-11-16 11:50:46,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 8544 transitions. [2022-11-16 11:50:46,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:50:46,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 8544 transitions. [2022-11-16 11:50:46,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 213.6) internal successors, (8544), 40 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:46,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 321.0) internal successors, (13161), 41 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:46,321 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 321.0) internal successors, (13161), 41 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:46,321 INFO L175 Difference]: Start difference. First operand has 301 places, 292 transitions, 848 flow. Second operand 40 states and 8544 transitions. [2022-11-16 11:50:46,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 495 transitions, 1925 flow [2022-11-16 11:50:46,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 495 transitions, 1857 flow, removed 0 selfloop flow, removed 16 redundant places. [2022-11-16 11:50:46,339 INFO L231 Difference]: Finished difference. Result has 343 places, 327 transitions, 1099 flow [2022-11-16 11:50:46,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1099, PETRI_PLACES=343, PETRI_TRANSITIONS=327} [2022-11-16 11:50:46,343 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 74 predicate places. [2022-11-16 11:50:46,344 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 327 transitions, 1099 flow [2022-11-16 11:50:46,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 209.47297297297297) internal successors, (15501), 74 states have internal predecessors, (15501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:46,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:50:46,350 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:46,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:46,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:46,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:50:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash -105073289, now seen corresponding path program 1 times [2022-11-16 11:50:46,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:46,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853674156] [2022-11-16 11:50:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:50:46,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853674156] [2022-11-16 11:50:46,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853674156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:46,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:46,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:50:46,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358385340] [2022-11-16 11:50:46,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:46,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:50:46,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:50:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:50:46,757 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-16 11:50:46,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 327 transitions, 1099 flow. Second operand has 4 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:46,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:50:46,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-16 11:50:46,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:50:47,340 INFO L130 PetriNetUnfolder]: 118/1566 cut-off events. [2022-11-16 11:50:47,340 INFO L131 PetriNetUnfolder]: For 333/334 co-relation queries the response was YES. [2022-11-16 11:50:47,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 1566 events. 118/1566 cut-off events. For 333/334 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 9521 event pairs, 30 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2089. Up to 141 conditions per place. [2022-11-16 11:50:47,371 INFO L137 encePairwiseOnDemand]: 314/321 looper letters, 42 selfloop transitions, 8 changer transitions 0/336 dead transitions. [2022-11-16 11:50:47,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 336 transitions, 1210 flow [2022-11-16 11:50:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:50:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:50:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1144 transitions. [2022-11-16 11:50:47,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8909657320872274 [2022-11-16 11:50:47,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1144 transitions. [2022-11-16 11:50:47,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1144 transitions. [2022-11-16 11:50:47,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:50:47,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1144 transitions. [2022-11-16 11:50:47,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:47,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:47,381 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:47,381 INFO L175 Difference]: Start difference. First operand has 343 places, 327 transitions, 1099 flow. Second operand 4 states and 1144 transitions. [2022-11-16 11:50:47,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 336 transitions, 1210 flow [2022-11-16 11:50:47,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 336 transitions, 1181 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-16 11:50:47,394 INFO L231 Difference]: Finished difference. Result has 336 places, 326 transitions, 1100 flow [2022-11-16 11:50:47,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1100, PETRI_PLACES=336, PETRI_TRANSITIONS=326} [2022-11-16 11:50:47,396 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 67 predicate places. [2022-11-16 11:50:47,396 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 326 transitions, 1100 flow [2022-11-16 11:50:47,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:47,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:50:47,397 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:47,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:50:47,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:50:47,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:47,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2025122299, now seen corresponding path program 1 times [2022-11-16 11:50:47,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:47,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222272491] [2022-11-16 11:50:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:47,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-16 11:50:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222272491] [2022-11-16 11:50:50,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222272491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61553994] [2022-11-16 11:50:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:50,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:50,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:50,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:50:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:50:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:51,372 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 [2022-11-16 11:50:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:51,737 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 23 treesize of output 22 [2022-11-16 11:50:52,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:52,041 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 23 treesize of output 22 [2022-11-16 11:50:52,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:52,348 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 23 treesize of output 22 [2022-11-16 11:50:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:52,609 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 23 treesize of output 22 [2022-11-16 11:50:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:53,064 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 [2022-11-16 11:50:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:53,153 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 [2022-11-16 11:50:53,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:50:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 11:50:53,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:55,845 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (v_ArrVal_338 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_338) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_339) |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 [2022-11-16 11:50:55,852 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (v_ArrVal_338 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_338) |c_ULTIMATE.start_main_~#t2~0#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|) 9223372039002259456)) is different from false [2022-11-16 11:52:13,903 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-16 11:52:13,904 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 5 case distinctions, treesize of input 53 treesize of output 74 [2022-11-16 11:52:13,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:52:13,922 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 [2022-11-16 11:52:13,931 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 53 treesize of output 49 [2022-11-16 11:52:13,937 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 [2022-11-16 11:52:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 29 not checked. [2022-11-16 11:52:33,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61553994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:52:33,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:52:33,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 29] total 72 [2022-11-16 11:52:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399834324] [2022-11-16 11:52:33,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:52:33,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 11:52:33,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 11:52:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=4403, Unknown=109, NotChecked=278, Total=5256 [2022-11-16 11:52:33,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 321 [2022-11-16 11:52:33,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 326 transitions, 1100 flow. Second operand has 73 states, 73 states have (on average 215.21917808219177) internal successors, (15711), 73 states have internal predecessors, (15711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:33,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:52:33,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 321 [2022-11-16 11:52:33,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:52:41,759 INFO L130 PetriNetUnfolder]: 1675/6318 cut-off events. [2022-11-16 11:52:41,759 INFO L131 PetriNetUnfolder]: For 2203/2206 co-relation queries the response was YES. [2022-11-16 11:52:41,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11102 conditions, 6318 events. 1675/6318 cut-off events. For 2203/2206 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 56522 event pairs, 134 based on Foata normal form. 7/5430 useless extension candidates. Maximal degree in co-relation 10693. Up to 870 conditions per place. [2022-11-16 11:52:41,870 INFO L137 encePairwiseOnDemand]: 282/321 looper letters, 203 selfloop transitions, 73 changer transitions 0/457 dead transitions. [2022-11-16 11:52:41,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 457 transitions, 2079 flow [2022-11-16 11:52:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:52:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 11:52:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 8722 transitions. [2022-11-16 11:52:41,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6792834890965732 [2022-11-16 11:52:41,885 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 8722 transitions. [2022-11-16 11:52:41,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 8722 transitions. [2022-11-16 11:52:41,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:52:41,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 8722 transitions. [2022-11-16 11:52:41,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 218.05) internal successors, (8722), 40 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:42,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 321.0) internal successors, (13161), 41 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:42,052 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 321.0) internal successors, (13161), 41 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:42,053 INFO L175 Difference]: Start difference. First operand has 336 places, 326 transitions, 1100 flow. Second operand 40 states and 8722 transitions. [2022-11-16 11:52:42,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 457 transitions, 2079 flow [2022-11-16 11:52:42,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 457 transitions, 2079 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:52:42,076 INFO L231 Difference]: Finished difference. Result has 384 places, 341 transitions, 1415 flow [2022-11-16 11:52:42,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1415, PETRI_PLACES=384, PETRI_TRANSITIONS=341} [2022-11-16 11:52:42,079 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 115 predicate places. [2022-11-16 11:52:42,079 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 341 transitions, 1415 flow [2022-11-16 11:52:42,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 215.21917808219177) internal successors, (15711), 73 states have internal predecessors, (15711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:42,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:52:42,083 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:52:42,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:52:42,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:52:42,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:52:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2030672635, now seen corresponding path program 1 times [2022-11-16 11:52:42,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280631466] [2022-11-16 11:52:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:42,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 108 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 11:52:46,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280631466] [2022-11-16 11:52:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280631466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:52:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088977260] [2022-11-16 11:52:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:46,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:46,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:52:46,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:52:46,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:52:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:52:46,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:52:46,582 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 [2022-11-16 11:52:46,752 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 11:52:46,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 11:52:47,076 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 15 treesize of output 11 [2022-11-16 11:52:47,502 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:52:47,503 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:52:47,884 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:52:47,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:52:48,268 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:52:48,268 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:52:48,632 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:52:48,633 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:52:49,466 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 11:52:49,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:52:49,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:52:49,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:52:50,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:52:50,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:52:50,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:52:50,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:52:50,646 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 [2022-11-16 11:52:50,762 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 [2022-11-16 11:52:50,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:52:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 11:52:51,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:31,342 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-16 11:54:31,343 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 5 case distinctions, treesize of input 56 treesize of output 77 [2022-11-16 11:54:31,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:54:31,371 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 1954 treesize of output 1892 [2022-11-16 11:54:31,399 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 1878 treesize of output 1750 [2022-11-16 11:54:31,430 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 1750 treesize of output 1718 [2022-11-16 11:54:31,460 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 1718 treesize of output 1654 [2022-11-16 11:55:48,215 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 11:55:48,215 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 22 treesize of output 18 [2022-11-16 11:55:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 35 proven. 82 refuted. 7 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 11:55:48,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088977260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:55:48,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:55:48,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 32] total 83 [2022-11-16 11:55:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84409381] [2022-11-16 11:55:48,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:55:48,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-16 11:55:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:48,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-16 11:55:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=6378, Unknown=99, NotChecked=0, Total=6972 [2022-11-16 11:55:48,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 321 [2022-11-16 11:55:48,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 341 transitions, 1415 flow. Second operand has 84 states, 84 states have (on average 212.38095238095238) internal successors, (17840), 84 states have internal predecessors, (17840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:48,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:55:48,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 321 [2022-11-16 11:55:48,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:56:03,679 INFO L130 PetriNetUnfolder]: 6785/22145 cut-off events. [2022-11-16 11:56:03,679 INFO L131 PetriNetUnfolder]: For 8030/8153 co-relation queries the response was YES. [2022-11-16 11:56:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38818 conditions, 22145 events. 6785/22145 cut-off events. For 8030/8153 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 262307 event pairs, 1463 based on Foata normal form. 2/17919 useless extension candidates. Maximal degree in co-relation 38479. Up to 2890 conditions per place. [2022-11-16 11:56:04,063 INFO L137 encePairwiseOnDemand]: 289/321 looper letters, 207 selfloop transitions, 53 changer transitions 0/468 dead transitions. [2022-11-16 11:56:04,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 468 transitions, 2306 flow [2022-11-16 11:56:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 11:56:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-16 11:56:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 9419 transitions. [2022-11-16 11:56:04,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6668790710846786 [2022-11-16 11:56:04,085 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 9419 transitions. [2022-11-16 11:56:04,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 9419 transitions. [2022-11-16 11:56:04,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:56:04,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 9419 transitions. [2022-11-16 11:56:04,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 214.0681818181818) internal successors, (9419), 44 states have internal predecessors, (9419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 321.0) internal successors, (14445), 45 states have internal predecessors, (14445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,141 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 321.0) internal successors, (14445), 45 states have internal predecessors, (14445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,141 INFO L175 Difference]: Start difference. First operand has 384 places, 341 transitions, 1415 flow. Second operand 44 states and 9419 transitions. [2022-11-16 11:56:04,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 468 transitions, 2306 flow [2022-11-16 11:56:04,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 468 transitions, 2209 flow, removed 22 selfloop flow, removed 18 redundant places. [2022-11-16 11:56:04,179 INFO L231 Difference]: Finished difference. Result has 418 places, 357 transitions, 1531 flow [2022-11-16 11:56:04,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1531, PETRI_PLACES=418, PETRI_TRANSITIONS=357} [2022-11-16 11:56:04,182 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 149 predicate places. [2022-11-16 11:56:04,182 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 357 transitions, 1531 flow [2022-11-16 11:56:04,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 212.38095238095238) internal successors, (17840), 84 states have internal predecessors, (17840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:56:04,189 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:04,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:04,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:56:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1473656865, now seen corresponding path program 1 times [2022-11-16 11:56:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:04,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365901620] [2022-11-16 11:56:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:04,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:56:04,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:04,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365901620] [2022-11-16 11:56:04,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365901620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:04,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:04,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290200276] [2022-11-16 11:56:04,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:04,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:04,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:04,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:04,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-16 11:56:04,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 357 transitions, 1531 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:56:04,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-16 11:56:04,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:56:06,605 INFO L130 PetriNetUnfolder]: 677/4737 cut-off events. [2022-11-16 11:56:06,606 INFO L131 PetriNetUnfolder]: For 1572/1581 co-relation queries the response was YES. [2022-11-16 11:56:06,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7361 conditions, 4737 events. 677/4737 cut-off events. For 1572/1581 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 51536 event pairs, 270 based on Foata normal form. 48/3763 useless extension candidates. Maximal degree in co-relation 7063. Up to 692 conditions per place. [2022-11-16 11:56:06,669 INFO L137 encePairwiseOnDemand]: 314/321 looper letters, 36 selfloop transitions, 6 changer transitions 0/366 dead transitions. [2022-11-16 11:56:06,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 366 transitions, 1629 flow [2022-11-16 11:56:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:56:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1143 transitions. [2022-11-16 11:56:06,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8901869158878505 [2022-11-16 11:56:06,673 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1143 transitions. [2022-11-16 11:56:06,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1143 transitions. [2022-11-16 11:56:06,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:56:06,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1143 transitions. [2022-11-16 11:56:06,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.75) internal successors, (1143), 4 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:06,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:06,679 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:06,679 INFO L175 Difference]: Start difference. First operand has 418 places, 357 transitions, 1531 flow. Second operand 4 states and 1143 transitions. [2022-11-16 11:56:06,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 366 transitions, 1629 flow [2022-11-16 11:56:06,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 366 transitions, 1520 flow, removed 5 selfloop flow, removed 31 redundant places. [2022-11-16 11:56:06,702 INFO L231 Difference]: Finished difference. Result has 392 places, 357 transitions, 1448 flow [2022-11-16 11:56:06,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1448, PETRI_PLACES=392, PETRI_TRANSITIONS=357} [2022-11-16 11:56:06,703 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 123 predicate places. [2022-11-16 11:56:06,704 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 357 transitions, 1448 flow [2022-11-16 11:56:06,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:06,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:56:06,704 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:06,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:56:06,705 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:56:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2001462622, now seen corresponding path program 1 times [2022-11-16 11:56:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:06,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645520472] [2022-11-16 11:56:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:06,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:56:06,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645520472] [2022-11-16 11:56:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645520472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:06,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:06,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:06,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336515667] [2022-11-16 11:56:06,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:06,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:06,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:06,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:06,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-16 11:56:06,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 357 transitions, 1448 flow. Second operand has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:06,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:56:06,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-16 11:56:06,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:56:08,394 INFO L130 PetriNetUnfolder]: 174/3420 cut-off events. [2022-11-16 11:56:08,394 INFO L131 PetriNetUnfolder]: For 1127/1132 co-relation queries the response was YES. [2022-11-16 11:56:08,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5245 conditions, 3420 events. 174/3420 cut-off events. For 1127/1132 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 25986 event pairs, 35 based on Foata normal form. 9/2968 useless extension candidates. Maximal degree in co-relation 4986. Up to 173 conditions per place. [2022-11-16 11:56:08,471 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 48 selfloop transitions, 7 changer transitions 0/367 dead transitions. [2022-11-16 11:56:08,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 367 transitions, 1587 flow [2022-11-16 11:56:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:56:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1142 transitions. [2022-11-16 11:56:08,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8894080996884736 [2022-11-16 11:56:08,476 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1142 transitions. [2022-11-16 11:56:08,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1142 transitions. [2022-11-16 11:56:08,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:56:08,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1142 transitions. [2022-11-16 11:56:08,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.5) internal successors, (1142), 4 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:08,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:08,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:08,609 INFO L175 Difference]: Start difference. First operand has 392 places, 357 transitions, 1448 flow. Second operand 4 states and 1142 transitions. [2022-11-16 11:56:08,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 367 transitions, 1587 flow [2022-11-16 11:56:08,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 367 transitions, 1580 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:56:08,633 INFO L231 Difference]: Finished difference. Result has 395 places, 357 transitions, 1466 flow [2022-11-16 11:56:08,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1466, PETRI_PLACES=395, PETRI_TRANSITIONS=357} [2022-11-16 11:56:08,636 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 126 predicate places. [2022-11-16 11:56:08,637 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 357 transitions, 1466 flow [2022-11-16 11:56:08,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:08,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:56:08,638 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:08,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:56:08,639 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:56:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1915799966, now seen corresponding path program 1 times [2022-11-16 11:56:08,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:08,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393173700] [2022-11-16 11:56:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-16 11:56:11,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:11,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393173700] [2022-11-16 11:56:11,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393173700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:11,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792522102] [2022-11-16 11:56:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:11,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:11,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:11,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:11,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:56:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:11,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:56:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:11,920 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 [2022-11-16 11:56:12,144 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:56:12,144 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 [2022-11-16 11:56:12,397 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:56:12,398 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 [2022-11-16 11:56:12,635 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:56:12,636 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 [2022-11-16 11:56:12,889 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 11:56:12,889 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 [2022-11-16 11:56:13,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:13,226 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 [2022-11-16 11:56:13,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-16 11:56:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 11:56:13,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:14,101 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_555 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_555) |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 [2022-11-16 11:56:14,108 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_555 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_555) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) is different from false [2022-11-16 11:57:39,684 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-16 11:57:39,685 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 5 case distinctions, treesize of input 52 treesize of output 73 [2022-11-16 11:57:39,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:39,699 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 [2022-11-16 11:58:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 29 not checked. [2022-11-16 11:58:00,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792522102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:00,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:00,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 27] total 69 [2022-11-16 11:58:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284008816] [2022-11-16 11:58:00,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 11:58:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 11:58:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=4092, Unknown=90, NotChecked=266, Total=4830 [2022-11-16 11:58:00,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 321 [2022-11-16 11:58:00,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 357 transitions, 1466 flow. Second operand has 70 states, 70 states have (on average 217.42857142857142) internal successors, (15220), 70 states have internal predecessors, (15220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:00,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:58:00,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 321 [2022-11-16 11:58:00,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:58:23,944 INFO L130 PetriNetUnfolder]: 6938/45947 cut-off events. [2022-11-16 11:58:23,944 INFO L131 PetriNetUnfolder]: For 19073/19076 co-relation queries the response was YES. [2022-11-16 11:58:24,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73608 conditions, 45947 events. 6938/45947 cut-off events. For 19073/19076 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 650808 event pairs, 3080 based on Foata normal form. 2/38978 useless extension candidates. Maximal degree in co-relation 73277. Up to 5562 conditions per place. [2022-11-16 11:58:24,657 INFO L137 encePairwiseOnDemand]: 282/321 looper letters, 228 selfloop transitions, 91 changer transitions 0/511 dead transitions. [2022-11-16 11:58:24,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 511 transitions, 2673 flow [2022-11-16 11:58:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 11:58:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-16 11:58:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 11824 transitions. [2022-11-16 11:58:24,677 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6821276104765202 [2022-11-16 11:58:24,677 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 11824 transitions. [2022-11-16 11:58:24,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 11824 transitions. [2022-11-16 11:58:24,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:58:24,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 11824 transitions. [2022-11-16 11:58:24,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 218.96296296296296) internal successors, (11824), 54 states have internal predecessors, (11824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:24,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 321.0) internal successors, (17655), 55 states have internal predecessors, (17655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:24,726 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 321.0) internal successors, (17655), 55 states have internal predecessors, (17655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:24,727 INFO L175 Difference]: Start difference. First operand has 395 places, 357 transitions, 1466 flow. Second operand 54 states and 11824 transitions. [2022-11-16 11:58:24,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 511 transitions, 2673 flow [2022-11-16 11:58:24,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 511 transitions, 2639 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-16 11:58:24,893 INFO L231 Difference]: Finished difference. Result has 451 places, 374 transitions, 1770 flow [2022-11-16 11:58:24,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1770, PETRI_PLACES=451, PETRI_TRANSITIONS=374} [2022-11-16 11:58:24,895 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 182 predicate places. [2022-11-16 11:58:24,895 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 374 transitions, 1770 flow [2022-11-16 11:58:24,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 217.42857142857142) internal successors, (15220), 70 states have internal predecessors, (15220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:24,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:58:24,898 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:24,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:58:25,105 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:58:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -581847871, now seen corresponding path program 1 times [2022-11-16 11:58:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:25,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781883106] [2022-11-16 11:58:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:25,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:58:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781883106] [2022-11-16 11:58:25,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781883106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:25,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:25,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:58:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825345978] [2022-11-16 11:58:25,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:25,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:58:25,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:58:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:58:25,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-16 11:58:25,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 374 transitions, 1770 flow. Second operand has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:25,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:58:25,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-16 11:58:25,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:58:26,495 INFO L130 PetriNetUnfolder]: 188/3321 cut-off events. [2022-11-16 11:58:26,495 INFO L131 PetriNetUnfolder]: For 1661/1662 co-relation queries the response was YES. [2022-11-16 11:58:26,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5429 conditions, 3321 events. 188/3321 cut-off events. For 1661/1662 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 26003 event pairs, 55 based on Foata normal form. 8/2894 useless extension candidates. Maximal degree in co-relation 5137. Up to 232 conditions per place. [2022-11-16 11:58:26,565 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 53 selfloop transitions, 7 changer transitions 0/382 dead transitions. [2022-11-16 11:58:26,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 382 transitions, 1919 flow [2022-11-16 11:58:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:58:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:58:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1140 transitions. [2022-11-16 11:58:26,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8878504672897196 [2022-11-16 11:58:26,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1140 transitions. [2022-11-16 11:58:26,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1140 transitions. [2022-11-16 11:58:26,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:58:26,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1140 transitions. [2022-11-16 11:58:26,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:26,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:26,575 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:26,575 INFO L175 Difference]: Start difference. First operand has 451 places, 374 transitions, 1770 flow. Second operand 4 states and 1140 transitions. [2022-11-16 11:58:26,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 382 transitions, 1919 flow [2022-11-16 11:58:26,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 382 transitions, 1763 flow, removed 10 selfloop flow, removed 45 redundant places. [2022-11-16 11:58:26,602 INFO L231 Difference]: Finished difference. Result has 410 places, 373 transitions, 1648 flow [2022-11-16 11:58:26,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1648, PETRI_PLACES=410, PETRI_TRANSITIONS=373} [2022-11-16 11:58:26,604 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 141 predicate places. [2022-11-16 11:58:26,604 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 373 transitions, 1648 flow [2022-11-16 11:58:26,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:26,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:58:26,605 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:58:26,605 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 11:58:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash -325545307, now seen corresponding path program 1 times [2022-11-16 11:58:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:26,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139015840] [2022-11-16 11:58:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 27 proven. 158 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:58:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139015840] [2022-11-16 11:58:30,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139015840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965463443] [2022-11-16 11:58:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:30,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:30,534 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:30,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:58:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:58:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:31,528 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 [2022-11-16 11:58:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:31,943 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 25 treesize of output 24 [2022-11-16 11:58:32,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:32,269 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 25 treesize of output 24 [2022-11-16 11:58:32,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:32,622 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 25 treesize of output 24 [2022-11-16 11:58:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:33,003 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 25 treesize of output 24 [2022-11-16 11:58:33,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:33,629 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 [2022-11-16 11:58:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:33,757 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 [2022-11-16 11:58:33,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-16 11:58:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 11:58:33,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:34,507 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_660 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_660) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_661) c_~o_2~0.base) c_~o_2~0.offset) 4294967296))) is different from false [2022-11-16 12:00:09,134 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-16 12:00:09,134 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 5 case distinctions, treesize of input 55 treesize of output 76 [2022-11-16 12:00:09,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:00:09,149 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 [2022-11-16 12:00:09,155 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 118 [2022-11-16 12:00:09,161 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 [2022-11-16 12:00:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 39 proven. 53 refuted. 3 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 12:00:30,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965463443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:30,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:30,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 26, 29] total 81 [2022-11-16 12:00:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998377611] [2022-11-16 12:00:30,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:30,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 12:00:30,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 12:00:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=5831, Unknown=120, NotChecked=158, Total=6642 [2022-11-16 12:00:30,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 321 [2022-11-16 12:00:30,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 373 transitions, 1648 flow. Second operand has 82 states, 82 states have (on average 215.52439024390245) internal successors, (17673), 82 states have internal predecessors, (17673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:30,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:30,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 321 [2022-11-16 12:00:30,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:44,350 INFO L130 PetriNetUnfolder]: 6684/22089 cut-off events. [2022-11-16 12:00:44,350 INFO L131 PetriNetUnfolder]: For 19515/19518 co-relation queries the response was YES. [2022-11-16 12:00:44,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44756 conditions, 22089 events. 6684/22089 cut-off events. For 19515/19518 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 256005 event pairs, 1440 based on Foata normal form. 27/18709 useless extension candidates. Maximal degree in co-relation 44419. Up to 3300 conditions per place. [2022-11-16 12:00:44,730 INFO L137 encePairwiseOnDemand]: 286/321 looper letters, 209 selfloop transitions, 76 changer transitions 0/478 dead transitions. [2022-11-16 12:00:44,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 478 transitions, 2579 flow [2022-11-16 12:00:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:00:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-16 12:00:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 10416 transitions. [2022-11-16 12:00:44,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.67601246105919 [2022-11-16 12:00:44,746 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 10416 transitions. [2022-11-16 12:00:44,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 10416 transitions. [2022-11-16 12:00:44,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:44,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 10416 transitions. [2022-11-16 12:00:44,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 217.0) internal successors, (10416), 48 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:44,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 321.0) internal successors, (15729), 49 states have internal predecessors, (15729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:44,787 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 321.0) internal successors, (15729), 49 states have internal predecessors, (15729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:44,788 INFO L175 Difference]: Start difference. First operand has 410 places, 373 transitions, 1648 flow. Second operand 48 states and 10416 transitions. [2022-11-16 12:00:44,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 478 transitions, 2579 flow [2022-11-16 12:00:44,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 478 transitions, 2571 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:00:44,940 INFO L231 Difference]: Finished difference. Result has 458 places, 375 transitions, 1844 flow [2022-11-16 12:00:44,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1844, PETRI_PLACES=458, PETRI_TRANSITIONS=375} [2022-11-16 12:00:44,942 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 189 predicate places. [2022-11-16 12:00:44,942 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 375 transitions, 1844 flow [2022-11-16 12:00:44,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 215.52439024390245) internal successors, (17673), 82 states have internal predecessors, (17673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:44,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:44,945 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:44,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:45,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:45,151 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 12:00:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1630168902, now seen corresponding path program 1 times [2022-11-16 12:00:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:45,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754941806] [2022-11-16 12:00:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 12:00:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:45,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754941806] [2022-11-16 12:00:45,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754941806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:45,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:45,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:00:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881251703] [2022-11-16 12:00:45,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:00:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:00:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:45,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-16 12:00:45,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 375 transitions, 1844 flow. Second operand has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:45,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:00:45,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-16 12:00:45,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:00:47,400 INFO L130 PetriNetUnfolder]: 727/5113 cut-off events. [2022-11-16 12:00:47,400 INFO L131 PetriNetUnfolder]: For 2671/2681 co-relation queries the response was YES. [2022-11-16 12:00:47,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8379 conditions, 5113 events. 727/5113 cut-off events. For 2671/2681 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 57647 event pairs, 240 based on Foata normal form. 26/4048 useless extension candidates. Maximal degree in co-relation 8088. Up to 703 conditions per place. [2022-11-16 12:00:47,464 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 37 selfloop transitions, 5 changer transitions 0/384 dead transitions. [2022-11-16 12:00:47,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 384 transitions, 1948 flow [2022-11-16 12:00:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:00:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:00:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1141 transitions. [2022-11-16 12:00:47,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8886292834890965 [2022-11-16 12:00:47,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1141 transitions. [2022-11-16 12:00:47,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1141 transitions. [2022-11-16 12:00:47,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:00:47,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1141 transitions. [2022-11-16 12:00:47,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:47,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:47,470 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:47,470 INFO L175 Difference]: Start difference. First operand has 458 places, 375 transitions, 1844 flow. Second operand 4 states and 1141 transitions. [2022-11-16 12:00:47,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 384 transitions, 1948 flow [2022-11-16 12:00:47,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 384 transitions, 1818 flow, removed 2 selfloop flow, removed 47 redundant places. [2022-11-16 12:00:47,498 INFO L231 Difference]: Finished difference. Result has 415 places, 375 transitions, 1729 flow [2022-11-16 12:00:47,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1729, PETRI_PLACES=415, PETRI_TRANSITIONS=375} [2022-11-16 12:00:47,499 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 146 predicate places. [2022-11-16 12:00:47,500 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 375 transitions, 1729 flow [2022-11-16 12:00:47,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:47,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:00:47,500 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:47,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:00:47,501 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 12:00:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1625453219, now seen corresponding path program 1 times [2022-11-16 12:00:47,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:47,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181872272] [2022-11-16 12:00:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:47,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 27 proven. 97 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 12:00:50,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:50,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181872272] [2022-11-16 12:00:50,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181872272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:50,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841423863] [2022-11-16 12:00:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:50,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:50,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:51,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:00:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 12:00:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:51,195 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 [2022-11-16 12:00:51,267 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:00:51,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:00:51,337 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:00:51,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:00:51,707 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 15 treesize of output 11 [2022-11-16 12:00:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:00:52,123 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 23 treesize of output 22 [2022-11-16 12:00:52,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:00:52,457 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 23 treesize of output 22 [2022-11-16 12:00:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:00:52,820 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 23 treesize of output 22 [2022-11-16 12:00:53,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:00:53,196 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 23 treesize of output 22 [2022-11-16 12:00:54,029 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:00:54,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:00:54,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:00:54,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:00:54,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:00:54,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:00:54,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:00:54,989 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 [2022-11-16 12:00:55,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:00:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 12:00:55,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:00,594 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_771 (Array Int Int)) (v_ArrVal_772 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_#t~malloc19#1.base_55| Int)) (or (< (select (select (store (store |c_#memory_int| |v_ULTIMATE.start_create_fresh_int_array_#t~malloc19#1.base_55| v_ArrVal_771) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_772) |c_ULTIMATE.start_main_#t~ret9#1.base|) |c_ULTIMATE.start_main_#t~ret9#1.offset|) 2147483648) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_#t~malloc19#1.base_55|) 0)))) is different from false [2022-11-16 12:01:56,640 INFO L321 Elim1Store]: treesize reduction 203, result has 19.4 percent of original size [2022-11-16 12:01:56,641 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 4 case distinctions, treesize of input 46 treesize of output 62 [2022-11-16 12:01:56,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:01:56,667 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 [2022-11-16 12:01:56,673 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 [2022-11-16 12:01:56,680 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 [2022-11-16 12:02:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-16 12:02:11,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841423863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:11,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:11,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29, 29] total 80 [2022-11-16 12:02:11,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811598889] [2022-11-16 12:02:11,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:11,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-16 12:02:11,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:11,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-16 12:02:11,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=5733, Unknown=57, NotChecked=156, Total=6480 [2022-11-16 12:02:11,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 321 [2022-11-16 12:02:11,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 375 transitions, 1729 flow. Second operand has 81 states, 81 states have (on average 170.0493827160494) internal successors, (13774), 81 states have internal predecessors, (13774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:11,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:11,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 321 [2022-11-16 12:02:11,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:38,189 INFO L130 PetriNetUnfolder]: 10601/39785 cut-off events. [2022-11-16 12:02:38,189 INFO L131 PetriNetUnfolder]: For 31789/31792 co-relation queries the response was YES. [2022-11-16 12:02:38,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76506 conditions, 39785 events. 10601/39785 cut-off events. For 31789/31792 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 524098 event pairs, 1782 based on Foata normal form. 2/33738 useless extension candidates. Maximal degree in co-relation 76144. Up to 5016 conditions per place. [2022-11-16 12:02:38,888 INFO L137 encePairwiseOnDemand]: 272/321 looper letters, 308 selfloop transitions, 141 changer transitions 0/616 dead transitions. [2022-11-16 12:02:38,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 616 transitions, 3600 flow [2022-11-16 12:02:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-16 12:02:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-11-16 12:02:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 14339 transitions. [2022-11-16 12:02:38,906 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5317831182317163 [2022-11-16 12:02:38,906 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 14339 transitions. [2022-11-16 12:02:38,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 14339 transitions. [2022-11-16 12:02:38,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:38,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 14339 transitions. [2022-11-16 12:02:38,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 170.70238095238096) internal successors, (14339), 84 states have internal predecessors, (14339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 321.0) internal successors, (27285), 85 states have internal predecessors, (27285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,961 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 321.0) internal successors, (27285), 85 states have internal predecessors, (27285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,961 INFO L175 Difference]: Start difference. First operand has 415 places, 375 transitions, 1729 flow. Second operand 84 states and 14339 transitions. [2022-11-16 12:02:38,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 616 transitions, 3600 flow [2022-11-16 12:02:39,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 616 transitions, 3591 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-16 12:02:39,184 INFO L231 Difference]: Finished difference. Result has 510 places, 429 transitions, 2457 flow [2022-11-16 12:02:39,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=2457, PETRI_PLACES=510, PETRI_TRANSITIONS=429} [2022-11-16 12:02:39,185 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 241 predicate places. [2022-11-16 12:02:39,185 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 429 transitions, 2457 flow [2022-11-16 12:02:39,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 170.0493827160494) internal successors, (13774), 81 states have internal predecessors, (13774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:39,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:39,187 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:39,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 12:02:39,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:02:39,387 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-16 12:02:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1004370683, now seen corresponding path program 1 times [2022-11-16 12:02:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384288810] [2022-11-16 12:02:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:02:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384288810] [2022-11-16 12:02:44,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384288810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:44,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131395527] [2022-11-16 12:02:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:44,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:44,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:44,534 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:44,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f273b05e-7fa9-4ad5-87f2-93bc086c5619/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:02:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:02:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:44,756 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 [2022-11-16 12:02:44,912 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:02:44,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:02:45,240 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 15 treesize of output 11 [2022-11-16 12:02:45,673 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:02:45,673 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:02:46,046 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:02:46,046 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:02:46,432 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:02:46,433 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:02:46,833 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:02:46,833 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:02:47,692 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:02:47,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:02:47,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:02:48,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:02:48,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:02:48,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:02:48,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:02:48,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:02:48,928 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 [2022-11-16 12:02:49,047 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 [2022-11-16 12:02:49,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-16 12:02:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 12:02:49,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:52,613 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_854 (Array Int Int)) (v_ArrVal_853 (Array Int Int)) (v_ArrVal_855 (Array Int Int))) (< 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc19#1.base| v_ArrVal_853) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_854) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_855) c_~o_0~0.base) c_~o_0~0.offset) 4294967296))) is different from false