./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a 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_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R --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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- 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-38b53e6 [2022-11-25 15:47:26,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:47:26,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:47:26,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:47:26,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:47:26,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:47:26,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:47:26,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:47:26,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:47:26,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:47:26,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:47:26,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:47:26,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:47:26,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:47:26,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:47:26,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:47:26,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:47:26,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:47:26,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:47:26,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:47:26,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:47:26,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:47:26,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:47:26,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:47:26,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:47:26,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:47:26,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:47:26,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:47:26,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:47:26,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:47:26,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:47:26,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:47:26,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:47:26,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:47:26,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:47:26,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:47:26,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:47:26,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:47:26,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:47:26,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:47:26,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:47:26,210 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 15:47:26,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:47:26,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:47:26,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:47:26,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:47:26,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:47:26,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:47:26,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:47:26,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:47:26,255 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:47:26,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:47:26,256 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:47:26,256 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:47:26,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:47:26,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:47:26,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:47:26,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:47:26,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:47:26,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:47:26,257 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 15:47:26,258 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:47:26,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:47:26,258 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:47:26,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:47:26,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:47:26,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:47:26,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:47:26,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:47:26,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:47:26,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:47:26,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:47:26,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:47:26,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:47:26,261 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:47:26,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:47:26,262 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:47:26,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:47:26,262 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2022-11-25 15:47:26,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:47:26,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:47:26,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:47:26,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:47:26,593 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:47:26,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-25 15:47:29,726 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:47:30,042 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:47:30,043 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-25 15:47:30,061 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/data/1c088f68b/d7eef4a03e524a068129f24e79058e79/FLAG5ed051a77 [2022-11-25 15:47:30,082 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/data/1c088f68b/d7eef4a03e524a068129f24e79058e79 [2022-11-25 15:47:30,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:47:30,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:47:30,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:47:30,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:47:30,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:47:30,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:30,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e25a221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30, skipping insertion in model container [2022-11-25 15:47:30,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:30,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:47:30,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:47:30,657 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-25 15:47:30,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:47:30,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:47:30,858 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-25 15:47:30,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:47:30,936 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:47:30,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30 WrapperNode [2022-11-25 15:47:30,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:47:30,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:47:30,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:47:30,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:47:30,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:30,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:30,996 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 238 [2022-11-25 15:47:30,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:47:30,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:47:30,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:47:30,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:47:31,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,065 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:47:31,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:47:31,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:47:31,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:47:31,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (1/1) ... [2022-11-25 15:47:31,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:47:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:47:31,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:47:31,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:47:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:47:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 15:47:31,189 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-25 15:47:31,189 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-25 15:47:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:47:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:47:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-25 15:47:31,191 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-25 15:47:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:47:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 15:47:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:47:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:47:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 15:47:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:47:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:47:31,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:47:31,194 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:47:31,403 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:47:31,405 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:47:31,963 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:47:31,974 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:47:31,974 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-25 15:47:31,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:47:31 BoogieIcfgContainer [2022-11-25 15:47:31,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:47:31,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:47:31,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:47:31,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:47:31,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:47:30" (1/3) ... [2022-11-25 15:47:31,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f802d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:47:31, skipping insertion in model container [2022-11-25 15:47:31,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:47:30" (2/3) ... [2022-11-25 15:47:31,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f802d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:47:31, skipping insertion in model container [2022-11-25 15:47:31,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:47:31" (3/3) ... [2022-11-25 15:47:31,986 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2022-11-25 15:47:31,995 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:47:32,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:47:32,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-25 15:47:32,007 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:47:32,151 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 15:47:32,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 265 transitions, 552 flow [2022-11-25 15:47:32,431 INFO L130 PetriNetUnfolder]: 54/494 cut-off events. [2022-11-25 15:47:32,431 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 15:47:32,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 494 events. 54/494 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2027 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 249. Up to 8 conditions per place. [2022-11-25 15:47:32,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 265 transitions, 552 flow [2022-11-25 15:47:32,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 245 places, 265 transitions, 552 flow [2022-11-25 15:47:32,457 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:47:32,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 245 places, 265 transitions, 552 flow [2022-11-25 15:47:32,477 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 245 places, 265 transitions, 552 flow [2022-11-25 15:47:32,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 265 transitions, 552 flow [2022-11-25 15:47:32,635 INFO L130 PetriNetUnfolder]: 54/494 cut-off events. [2022-11-25 15:47:32,635 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 15:47:32,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 494 events. 54/494 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2027 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 249. Up to 8 conditions per place. [2022-11-25 15:47:32,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 21680 [2022-11-25 15:48:04,133 INFO L134 LiptonReduction]: Checked pairs total: 36024 [2022-11-25 15:48:04,133 INFO L136 LiptonReduction]: Total number of compositions: 237 [2022-11-25 15:48:04,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:48:04,159 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;@afae047, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:48:04,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-25 15:48:04,163 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 15:48:04,163 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:48:04,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:04,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:48:04,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash 33212, now seen corresponding path program 1 times [2022-11-25 15:48:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:04,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616776493] [2022-11-25 15:48:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:04,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616776493] [2022-11-25 15:48:04,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616776493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:04,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:04,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:48:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233695487] [2022-11-25 15:48:04,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:04,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:48:04,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:48:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:48:04,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 502 [2022-11-25 15:48:04,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 186 flow. Second operand has 2 states, 2 states have (on average 242.0) internal successors, (484), 2 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:04,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:04,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 502 [2022-11-25 15:48:04,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:05,764 INFO L130 PetriNetUnfolder]: 4997/8229 cut-off events. [2022-11-25 15:48:05,764 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-25 15:48:05,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16188 conditions, 8229 events. 4997/8229 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 48677 event pairs, 4694 based on Foata normal form. 232/6343 useless extension candidates. Maximal degree in co-relation 14321. Up to 7855 conditions per place. [2022-11-25 15:48:05,812 INFO L137 encePairwiseOnDemand]: 490/502 looper letters, 63 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2022-11-25 15:48:05,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 288 flow [2022-11-25 15:48:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:48:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 15:48:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 557 transitions. [2022-11-25 15:48:05,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5547808764940239 [2022-11-25 15:48:05,836 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 557 transitions. [2022-11-25 15:48:05,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 557 transitions. [2022-11-25 15:48:05,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:05,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 557 transitions. [2022-11-25 15:48:05,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 278.5) internal successors, (557), 2 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:05,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:05,863 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:05,865 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 186 flow. Second operand 2 states and 557 transitions. [2022-11-25 15:48:05,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 288 flow [2022-11-25 15:48:05,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:48:05,877 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 162 flow [2022-11-25 15:48:05,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2022-11-25 15:48:05,883 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2022-11-25 15:48:05,884 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 162 flow [2022-11-25 15:48:05,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 242.0) internal successors, (484), 2 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:05,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:05,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:48:05,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:48:05,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash 33213, now seen corresponding path program 1 times [2022-11-25 15:48:05,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:05,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218464246] [2022-11-25 15:48:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:05,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:06,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218464246] [2022-11-25 15:48:06,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218464246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:06,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:06,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:48:06,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189127713] [2022-11-25 15:48:06,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:06,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:48:06,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:48:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:48:06,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 502 [2022-11-25 15:48:06,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:06,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:06,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 502 [2022-11-25 15:48:06,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:07,466 INFO L130 PetriNetUnfolder]: 4997/8230 cut-off events. [2022-11-25 15:48:07,466 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-25 15:48:07,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16191 conditions, 8230 events. 4997/8230 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 48678 event pairs, 4694 based on Foata normal form. 0/6112 useless extension candidates. Maximal degree in co-relation 16186. Up to 7855 conditions per place. [2022-11-25 15:48:07,530 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 62 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2022-11-25 15:48:07,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 292 flow [2022-11-25 15:48:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:48:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:48:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2022-11-25 15:48:07,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5159362549800797 [2022-11-25 15:48:07,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2022-11-25 15:48:07,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2022-11-25 15:48:07,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:07,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2022-11-25 15:48:07,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:07,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:07,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:07,545 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 162 flow. Second operand 3 states and 777 transitions. [2022-11-25 15:48:07,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 292 flow [2022-11-25 15:48:07,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:48:07,554 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 176 flow [2022-11-25 15:48:07,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2022-11-25 15:48:07,556 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2022-11-25 15:48:07,556 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 176 flow [2022-11-25 15:48:07,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:07,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:07,557 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:48:07,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:48:07,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1030545, now seen corresponding path program 1 times [2022-11-25 15:48:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:07,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543370597] [2022-11-25 15:48:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:07,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543370597] [2022-11-25 15:48:07,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543370597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:07,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:07,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:48:07,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463893104] [2022-11-25 15:48:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:07,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:48:07,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:07,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:48:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:48:07,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 502 [2022-11-25 15:48:07,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:07,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:07,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 502 [2022-11-25 15:48:07,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:09,076 INFO L130 PetriNetUnfolder]: 4997/8229 cut-off events. [2022-11-25 15:48:09,077 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-25 15:48:09,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16196 conditions, 8229 events. 4997/8229 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 48689 event pairs, 4694 based on Foata normal form. 0/6112 useless extension candidates. Maximal degree in co-relation 16189. Up to 7854 conditions per place. [2022-11-25 15:48:09,123 INFO L137 encePairwiseOnDemand]: 500/502 looper letters, 62 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2022-11-25 15:48:09,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 298 flow [2022-11-25 15:48:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:48:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:48:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2022-11-25 15:48:09,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5139442231075697 [2022-11-25 15:48:09,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2022-11-25 15:48:09,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2022-11-25 15:48:09,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:09,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2022-11-25 15:48:09,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:09,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:09,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:09,135 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 176 flow. Second operand 3 states and 774 transitions. [2022-11-25 15:48:09,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 298 flow [2022-11-25 15:48:09,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 294 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:09,142 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 170 flow [2022-11-25 15:48:09,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2022-11-25 15:48:09,144 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2022-11-25 15:48:09,144 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 170 flow [2022-11-25 15:48:09,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:09,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:09,145 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:48:09,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:48:09,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash 635477825, now seen corresponding path program 1 times [2022-11-25 15:48:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933096074] [2022-11-25 15:48:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:09,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:09,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933096074] [2022-11-25 15:48:09,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933096074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:48:09,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727493052] [2022-11-25 15:48:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:09,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:09,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:09,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:09,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:48:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:48:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:09,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:09,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727493052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:09,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:48:09,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:48:09,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129184603] [2022-11-25 15:48:09,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:09,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:48:09,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:48:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:48:09,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 502 [2022-11-25 15:48:09,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 237.57142857142858) internal successors, (1663), 7 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:09,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:09,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 502 [2022-11-25 15:48:09,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:10,864 INFO L130 PetriNetUnfolder]: 4997/8232 cut-off events. [2022-11-25 15:48:10,864 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-25 15:48:10,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16204 conditions, 8232 events. 4997/8232 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 48670 event pairs, 4694 based on Foata normal form. 0/6115 useless extension candidates. Maximal degree in co-relation 16197. Up to 7854 conditions per place. [2022-11-25 15:48:10,908 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 61 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-11-25 15:48:10,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 314 flow [2022-11-25 15:48:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:48:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:48:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1485 transitions. [2022-11-25 15:48:10,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49302788844621515 [2022-11-25 15:48:10,914 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1485 transitions. [2022-11-25 15:48:10,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1485 transitions. [2022-11-25 15:48:10,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:10,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1485 transitions. [2022-11-25 15:48:10,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.5) internal successors, (1485), 6 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:10,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:10,928 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:10,928 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 170 flow. Second operand 6 states and 1485 transitions. [2022-11-25 15:48:10,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 314 flow [2022-11-25 15:48:10,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:10,936 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 205 flow [2022-11-25 15:48:10,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2022-11-25 15:48:10,939 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2022-11-25 15:48:10,939 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 205 flow [2022-11-25 15:48:10,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 237.57142857142858) internal successors, (1663), 7 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:10,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:10,941 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 15:48:10,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:11,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:11,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:11,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1291412117, now seen corresponding path program 2 times [2022-11-25 15:48:11,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:11,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150993894] [2022-11-25 15:48:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:48:11,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:11,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150993894] [2022-11-25 15:48:11,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150993894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:48:11,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:48:11,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:48:11,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332582477] [2022-11-25 15:48:11,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:48:11,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:48:11,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:11,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:48:11,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:48:11,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 502 [2022-11-25 15:48:11,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:11,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:11,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 502 [2022-11-25 15:48:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:12,774 INFO L130 PetriNetUnfolder]: 4854/7869 cut-off events. [2022-11-25 15:48:12,775 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-11-25 15:48:12,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15594 conditions, 7869 events. 4854/7869 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 46110 event pairs, 2346 based on Foata normal form. 0/5898 useless extension candidates. Maximal degree in co-relation 15584. Up to 7569 conditions per place. [2022-11-25 15:48:12,815 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 71 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-11-25 15:48:12,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 80 transitions, 365 flow [2022-11-25 15:48:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:48:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:48:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 783 transitions. [2022-11-25 15:48:12,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5199203187250996 [2022-11-25 15:48:12,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 783 transitions. [2022-11-25 15:48:12,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 783 transitions. [2022-11-25 15:48:12,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:12,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 783 transitions. [2022-11-25 15:48:12,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:12,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:12,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:12,827 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 205 flow. Second operand 3 states and 783 transitions. [2022-11-25 15:48:12,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 80 transitions, 365 flow [2022-11-25 15:48:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 351 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:48:12,830 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 195 flow [2022-11-25 15:48:12,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-11-25 15:48:12,831 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2022-11-25 15:48:12,831 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 195 flow [2022-11-25 15:48:12,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:12,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:12,832 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-25 15:48:12,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:48:12,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -198475381, now seen corresponding path program 1 times [2022-11-25 15:48:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:12,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936850271] [2022-11-25 15:48:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:12,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936850271] [2022-11-25 15:48:13,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936850271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:48:13,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367780712] [2022-11-25 15:48:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:13,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:13,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:13,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:13,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:48:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:48:13,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:13,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367780712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:13,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:48:13,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-25 15:48:13,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387780406] [2022-11-25 15:48:13,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:48:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:48:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:48:13,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 502 [2022-11-25 15:48:13,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 195 flow. Second operand has 12 states, 12 states have (on average 237.25) internal successors, (2847), 12 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:13,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:13,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 502 [2022-11-25 15:48:13,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:14,660 INFO L130 PetriNetUnfolder]: 4854/7913 cut-off events. [2022-11-25 15:48:14,661 INFO L131 PetriNetUnfolder]: For 248/248 co-relation queries the response was YES. [2022-11-25 15:48:14,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15663 conditions, 7913 events. 4854/7913 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 46163 event pairs, 4586 based on Foata normal form. 6/5946 useless extension candidates. Maximal degree in co-relation 15651. Up to 7576 conditions per place. [2022-11-25 15:48:14,718 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 59 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2022-11-25 15:48:14,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 77 transitions, 371 flow [2022-11-25 15:48:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:48:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:48:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2908 transitions. [2022-11-25 15:48:14,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48273572377158036 [2022-11-25 15:48:14,728 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2908 transitions. [2022-11-25 15:48:14,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2908 transitions. [2022-11-25 15:48:14,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:14,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2908 transitions. [2022-11-25 15:48:14,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 242.33333333333334) internal successors, (2908), 12 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:14,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:14,751 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:14,751 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 195 flow. Second operand 12 states and 2908 transitions. [2022-11-25 15:48:14,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 77 transitions, 371 flow [2022-11-25 15:48:14,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 77 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:48:14,755 INFO L231 Difference]: Finished difference. Result has 94 places, 77 transitions, 275 flow [2022-11-25 15:48:14,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=275, PETRI_PLACES=94, PETRI_TRANSITIONS=77} [2022-11-25 15:48:14,756 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 25 predicate places. [2022-11-25 15:48:14,757 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 77 transitions, 275 flow [2022-11-25 15:48:14,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 237.25) internal successors, (2847), 12 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:14,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:14,759 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-25 15:48:14,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:14,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:48:14,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash 579199499, now seen corresponding path program 2 times [2022-11-25 15:48:14,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:14,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881103480] [2022-11-25 15:48:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:14,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:15,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:15,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881103480] [2022-11-25 15:48:15,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881103480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:48:15,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082261436] [2022-11-25 15:48:15,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:48:15,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:15,620 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:15,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:48:15,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:48:15,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:48:15,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:48:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:16,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:16,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082261436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:16,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:48:16,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-25 15:48:16,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783172279] [2022-11-25 15:48:16,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:16,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:48:16,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:48:16,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:48:16,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 502 [2022-11-25 15:48:16,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 77 transitions, 275 flow. Second operand has 24 states, 24 states have (on average 237.125) internal successors, (5691), 24 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:16,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:48:16,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 502 [2022-11-25 15:48:16,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:48:18,460 INFO L130 PetriNetUnfolder]: 4854/7925 cut-off events. [2022-11-25 15:48:18,460 INFO L131 PetriNetUnfolder]: For 743/743 co-relation queries the response was YES. [2022-11-25 15:48:18,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15743 conditions, 7925 events. 4854/7925 cut-off events. For 743/743 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 46145 event pairs, 4586 based on Foata normal form. 12/5964 useless extension candidates. Maximal degree in co-relation 15725. Up to 7576 conditions per place. [2022-11-25 15:48:18,528 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 59 selfloop transitions, 23 changer transitions 0/89 dead transitions. [2022-11-25 15:48:18,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 89 transitions, 535 flow [2022-11-25 15:48:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:48:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:48:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5758 transitions. [2022-11-25 15:48:18,547 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47792164674634796 [2022-11-25 15:48:18,547 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5758 transitions. [2022-11-25 15:48:18,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5758 transitions. [2022-11-25 15:48:18,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:48:18,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5758 transitions. [2022-11-25 15:48:18,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 239.91666666666666) internal successors, (5758), 24 states have internal predecessors, (5758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:18,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 502.0) internal successors, (12550), 25 states have internal predecessors, (12550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:18,604 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 502.0) internal successors, (12550), 25 states have internal predecessors, (12550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:18,612 INFO L175 Difference]: Start difference. First operand has 94 places, 77 transitions, 275 flow. Second operand 24 states and 5758 transitions. [2022-11-25 15:48:18,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 89 transitions, 535 flow [2022-11-25 15:48:18,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 89 transitions, 463 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-25 15:48:18,618 INFO L231 Difference]: Finished difference. Result has 124 places, 89 transitions, 395 flow [2022-11-25 15:48:18,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=395, PETRI_PLACES=124, PETRI_TRANSITIONS=89} [2022-11-25 15:48:18,620 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 55 predicate places. [2022-11-25 15:48:18,620 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 89 transitions, 395 flow [2022-11-25 15:48:18,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 237.125) internal successors, (5691), 24 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:18,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:48:18,624 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2022-11-25 15:48:18,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 15:48:18,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:18,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-25 15:48:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1241744139, now seen corresponding path program 3 times [2022-11-25 15:48:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505556926] [2022-11-25 15:48:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:48:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:20,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:20,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505556926] [2022-11-25 15:48:20,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505556926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:48:20,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868373572] [2022-11-25 15:48:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:48:20,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:20,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:20,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d62ed22-d737-43ad-9bad-c94289280933/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process