./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --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_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/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_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/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_c9c90b03-c9c7-4770-9d86-b2e15b792308/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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- 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 15:41:12,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:41:12,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:41:12,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:41:12,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:41:12,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:41:12,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:41:12,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:41:12,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:41:12,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:41:12,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:41:12,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:41:12,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:41:12,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:41:12,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:41:12,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:41:12,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:41:12,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:41:12,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:41:12,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:41:12,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:41:12,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:41:12,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:41:12,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:41:12,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:41:12,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:41:12,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:41:12,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:41:12,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:41:12,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:41:12,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:41:12,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:41:12,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:41:12,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:41:12,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:41:12,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:41:12,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:41:12,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:41:12,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:41:12,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:41:12,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:41:12,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 15:41:12,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:41:12,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:41:12,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:41:12,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:41:12,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:41:12,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:41:12,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:41:12,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:41:12,299 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:41:12,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:41:12,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:41:12,300 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:41:12,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:41:12,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:41:12,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:41:12,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:41:12,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:41:12,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:41:12,301 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 15:41:12,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:41:12,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:41:12,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:41:12,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:41:12,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:41:12,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:41:12,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:41:12,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:41:12,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:41:12,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:41:12,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:41:12,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:41:12,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:41:12,304 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:41:12,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:41:12,305 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:41:12,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:41:12,305 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_c9c90b03-c9c7-4770-9d86-b2e15b792308/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-11-25 15:41:12,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:41:12,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:41:12,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:41:12,653 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:41:12,654 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:41:12,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-25 15:41:15,796 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:41:16,005 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:41:16,006 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-25 15:41:16,014 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/data/eabe4f64b/d126551def0c4026a1d88b750a45d126/FLAGed29548e3 [2022-11-25 15:41:16,032 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/data/eabe4f64b/d126551def0c4026a1d88b750a45d126 [2022-11-25 15:41:16,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:41:16,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:41:16,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:41:16,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:41:16,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:41:16,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fdcff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16, skipping insertion in model container [2022-11-25 15:41:16,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:41:16,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:41:16,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:16,253 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:16,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:16,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:16,264 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_c9c90b03-c9c7-4770-9d86-b2e15b792308/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-25 15:41:16,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:41:16,274 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:41:16,290 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:16,290 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:16,292 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:41:16,292 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:41:16,297 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_c9c90b03-c9c7-4770-9d86-b2e15b792308/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-25 15:41:16,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:41:16,313 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:41:16,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16 WrapperNode [2022-11-25 15:41:16,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:41:16,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:41:16,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:41:16,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:41:16,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,371 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-25 15:41:16,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:41:16,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:41:16,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:41:16,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:41:16,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,428 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:41:16,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:41:16,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:41:16,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:41:16,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (1/1) ... [2022-11-25 15:41:16,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:41:16,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:16,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:41:16,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:41:16,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:41:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:41:16,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:41:16,526 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:41:16,526 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:41:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:41:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:41:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:41:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:41:16,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:41:16,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:41:16,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:41:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:41:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:41:16,532 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 15:41:16,725 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:41:16,728 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:41:17,114 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:41:17,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:41:17,175 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 15:41:17,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:41:17 BoogieIcfgContainer [2022-11-25 15:41:17,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:41:17,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:41:17,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:41:17,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:41:17,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:41:16" (1/3) ... [2022-11-25 15:41:17,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b01543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:41:17, skipping insertion in model container [2022-11-25 15:41:17,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:41:16" (2/3) ... [2022-11-25 15:41:17,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b01543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:41:17, skipping insertion in model container [2022-11-25 15:41:17,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:41:17" (3/3) ... [2022-11-25 15:41:17,198 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-11-25 15:41:17,210 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:41:17,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:41:17,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-25 15:41:17,224 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:41:17,370 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:41:17,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 98 transitions, 212 flow [2022-11-25 15:41:17,514 INFO L130 PetriNetUnfolder]: 6/96 cut-off events. [2022-11-25 15:41:17,514 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:41:17,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 96 events. 6/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 111 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2022-11-25 15:41:17,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 98 transitions, 212 flow [2022-11-25 15:41:17,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 77 transitions, 163 flow [2022-11-25 15:41:17,540 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:41:17,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 77 transitions, 163 flow [2022-11-25 15:41:17,570 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 77 transitions, 163 flow [2022-11-25 15:41:17,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 163 flow [2022-11-25 15:41:17,612 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2022-11-25 15:41:17,618 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:41:17,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 77 events. 5/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 108 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2022-11-25 15:41:17,622 INFO L119 LiptonReduction]: Number of co-enabled transitions 1088 [2022-11-25 15:41:20,434 INFO L134 LiptonReduction]: Checked pairs total: 999 [2022-11-25 15:41:20,434 INFO L136 LiptonReduction]: Total number of compositions: 71 [2022-11-25 15:41:20,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:41:20,467 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;@73f281cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:41:20,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-25 15:41:20,471 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-11-25 15:41:20,471 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:41:20,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:20,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:41:20,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 11318200, now seen corresponding path program 1 times [2022-11-25 15:41:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:20,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588895941] [2022-11-25 15:41:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:20,718 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 15:41:20,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:20,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588895941] [2022-11-25 15:41:20,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588895941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:20,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:20,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:41:20,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895420599] [2022-11-25 15:41:20,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:20,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:41:20,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:20,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:41:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:41:20,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 169 [2022-11-25 15:41:20,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 15:41:20,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:20,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 169 [2022-11-25 15:41:20,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:20,908 INFO L130 PetriNetUnfolder]: 100/177 cut-off events. [2022-11-25 15:41:20,908 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-25 15:41:20,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 177 events. 100/177 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 573 event pairs, 43 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 312. Up to 98 conditions per place. [2022-11-25 15:41:20,914 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 27 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2022-11-25 15:41:20,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 140 flow [2022-11-25 15:41:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:41:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:41:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-11-25 15:41:20,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.571992110453649 [2022-11-25 15:41:20,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-11-25 15:41:20,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-11-25 15:41:20,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:20,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-11-25 15:41:20,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 15:41:20,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 15:41:20,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 15:41:20,966 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 290 transitions. [2022-11-25 15:41:20,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 140 flow [2022-11-25 15:41:20,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 15:41:20,974 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 55 flow [2022-11-25 15:41:20,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2022-11-25 15:41:20,986 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2022-11-25 15:41:20,987 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 55 flow [2022-11-25 15:41:20,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 15:41:20,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:20,989 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:41:20,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:41:20,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:20,991 INFO L85 PathProgramCache]: Analyzing trace with hash 11318201, now seen corresponding path program 1 times [2022-11-25 15:41:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:20,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505270724] [2022-11-25 15:41:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:20,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:21,187 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 15:41:21,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:21,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505270724] [2022-11-25 15:41:21,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505270724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:21,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:21,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:41:21,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901155123] [2022-11-25 15:41:21,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:21,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:21,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:21,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2022-11-25 15:41:21,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 15:41:21,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:21,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2022-11-25 15:41:21,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:21,352 INFO L130 PetriNetUnfolder]: 79/142 cut-off events. [2022-11-25 15:41:21,352 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:41:21,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 142 events. 79/142 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 464 event pairs, 5 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 282. Up to 69 conditions per place. [2022-11-25 15:41:21,355 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 32 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2022-11-25 15:41:21,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 37 transitions, 172 flow [2022-11-25 15:41:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2022-11-25 15:41:21,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5177514792899408 [2022-11-25 15:41:21,358 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2022-11-25 15:41:21,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2022-11-25 15:41:21,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:21,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2022-11-25 15:41:21,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 15:41:21,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:21,364 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:21,364 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 55 flow. Second operand 4 states and 350 transitions. [2022-11-25 15:41:21,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 37 transitions, 172 flow [2022-11-25 15:41:21,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 37 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:41:21,366 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 78 flow [2022-11-25 15:41:21,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2022-11-25 15:41:21,367 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2022-11-25 15:41:21,368 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 78 flow [2022-11-25 15:41:21,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 15:41:21,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:21,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:41:21,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:41:21,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 11318181, now seen corresponding path program 1 times [2022-11-25 15:41:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:21,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756909275] [2022-11-25 15:41:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:21,453 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 15:41:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756909275] [2022-11-25 15:41:21,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756909275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:21,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:21,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:41:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978468208] [2022-11-25 15:41:21,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:21,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:21,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:21,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 169 [2022-11-25 15:41:21,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:41:21,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:21,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 169 [2022-11-25 15:41:21,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:21,612 INFO L130 PetriNetUnfolder]: 62/113 cut-off events. [2022-11-25 15:41:21,612 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-25 15:41:21,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 113 events. 62/113 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 328 event pairs, 6 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 260. Up to 94 conditions per place. [2022-11-25 15:41:21,614 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 24 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2022-11-25 15:41:21,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 146 flow [2022-11-25 15:41:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2022-11-25 15:41:21,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.507396449704142 [2022-11-25 15:41:21,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2022-11-25 15:41:21,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2022-11-25 15:41:21,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:21,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2022-11-25 15:41:21,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 15:41:21,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:21,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:21,621 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 78 flow. Second operand 4 states and 343 transitions. [2022-11-25 15:41:21,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 146 flow [2022-11-25 15:41:21,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:21,624 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 74 flow [2022-11-25 15:41:21,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-11-25 15:41:21,625 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2022-11-25 15:41:21,626 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 74 flow [2022-11-25 15:41:21,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 15:41:21,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:21,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:41:21,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:41:21,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2006990346, now seen corresponding path program 1 times [2022-11-25 15:41:21,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:21,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110855620] [2022-11-25 15:41:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:21,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:21,745 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 15:41:21,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:21,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110855620] [2022-11-25 15:41:21,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110855620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:21,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:21,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:41:21,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354879478] [2022-11-25 15:41:21,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:21,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:21,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:21,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2022-11-25 15:41:21,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 15:41:21,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:21,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2022-11-25 15:41:21,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:21,903 INFO L130 PetriNetUnfolder]: 54/101 cut-off events. [2022-11-25 15:41:21,905 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-25 15:41:21,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 101 events. 54/101 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 253 event pairs, 11 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 182. Up to 62 conditions per place. [2022-11-25 15:41:21,909 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 25 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2022-11-25 15:41:21,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 169 flow [2022-11-25 15:41:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2022-11-25 15:41:21,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.507396449704142 [2022-11-25 15:41:21,912 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2022-11-25 15:41:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2022-11-25 15:41:21,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:21,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2022-11-25 15:41:21,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 15:41:21,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:21,917 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:21,917 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 74 flow. Second operand 4 states and 343 transitions. [2022-11-25 15:41:21,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 169 flow [2022-11-25 15:41:21,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:21,922 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 100 flow [2022-11-25 15:41:21,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2022-11-25 15:41:21,924 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2022-11-25 15:41:21,924 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 100 flow [2022-11-25 15:41:21,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 15:41:21,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:21,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:41:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:41:21,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2006990352, now seen corresponding path program 1 times [2022-11-25 15:41:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:21,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023503818] [2022-11-25 15:41:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:22,038 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 15:41:22,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:22,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023503818] [2022-11-25 15:41:22,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023503818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:22,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:22,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:41:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377570316] [2022-11-25 15:41:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:22,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:22,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:22,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 169 [2022-11-25 15:41:22,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 15:41:22,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:22,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 169 [2022-11-25 15:41:22,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:22,152 INFO L130 PetriNetUnfolder]: 43/82 cut-off events. [2022-11-25 15:41:22,152 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-25 15:41:22,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 82 events. 43/82 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 184 event pairs, 6 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 178. Up to 57 conditions per place. [2022-11-25 15:41:22,154 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 23 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2022-11-25 15:41:22,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 166 flow [2022-11-25 15:41:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2022-11-25 15:41:22,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5029585798816568 [2022-11-25 15:41:22,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 340 transitions. [2022-11-25 15:41:22,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 340 transitions. [2022-11-25 15:41:22,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:22,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 340 transitions. [2022-11-25 15:41:22,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 15:41:22,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:22,160 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:22,160 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 100 flow. Second operand 4 states and 340 transitions. [2022-11-25 15:41:22,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 166 flow [2022-11-25 15:41:22,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:41:22,162 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 99 flow [2022-11-25 15:41:22,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2022-11-25 15:41:22,163 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2022-11-25 15:41:22,163 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 99 flow [2022-11-25 15:41:22,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 15:41:22,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:22,164 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:22,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:41:22,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1338605412, now seen corresponding path program 1 times [2022-11-25 15:41:22,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756330080] [2022-11-25 15:41:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:22,288 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 15:41:22,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756330080] [2022-11-25 15:41:22,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756330080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:22,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:22,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:41:22,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559495933] [2022-11-25 15:41:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:41:22,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:41:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:41:22,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2022-11-25 15:41:22,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:22,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:22,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2022-11-25 15:41:22,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:22,566 INFO L130 PetriNetUnfolder]: 50/93 cut-off events. [2022-11-25 15:41:22,566 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-25 15:41:22,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 93 events. 50/93 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 223 event pairs, 2 based on Foata normal form. 4/97 useless extension candidates. Maximal degree in co-relation 234. Up to 29 conditions per place. [2022-11-25 15:41:22,568 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 29 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2022-11-25 15:41:22,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 239 flow [2022-11-25 15:41:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:41:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:41:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 610 transitions. [2022-11-25 15:41:22,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4511834319526627 [2022-11-25 15:41:22,572 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 610 transitions. [2022-11-25 15:41:22,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 610 transitions. [2022-11-25 15:41:22,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:22,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 610 transitions. [2022-11-25 15:41:22,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 76.25) internal successors, (610), 8 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 15:41:22,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:22,582 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:22,585 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 99 flow. Second operand 8 states and 610 transitions. [2022-11-25 15:41:22,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 239 flow [2022-11-25 15:41:22,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:22,594 INFO L231 Difference]: Finished difference. Result has 39 places, 25 transitions, 153 flow [2022-11-25 15:41:22,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=153, PETRI_PLACES=39, PETRI_TRANSITIONS=25} [2022-11-25 15:41:22,595 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2022-11-25 15:41:22,595 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 25 transitions, 153 flow [2022-11-25 15:41:22,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:22,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:22,596 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:22,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:41:22,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:22,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:22,597 INFO L85 PathProgramCache]: Analyzing trace with hash -277718143, now seen corresponding path program 1 times [2022-11-25 15:41:22,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:22,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890545759] [2022-11-25 15:41:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:22,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:22,668 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 15:41:22,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890545759] [2022-11-25 15:41:22,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890545759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:22,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:41:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007137099] [2022-11-25 15:41:22,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:22,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:41:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:41:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:41:22,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 169 [2022-11-25 15:41:22,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 25 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 15:41:22,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:22,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 169 [2022-11-25 15:41:22,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:22,748 INFO L130 PetriNetUnfolder]: 42/79 cut-off events. [2022-11-25 15:41:22,749 INFO L131 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2022-11-25 15:41:22,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 79 events. 42/79 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 9 based on Foata normal form. 10/89 useless extension candidates. Maximal degree in co-relation 202. Up to 49 conditions per place. [2022-11-25 15:41:22,751 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 22 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2022-11-25 15:41:22,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 203 flow [2022-11-25 15:41:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:41:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:41:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2022-11-25 15:41:22,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5325443786982249 [2022-11-25 15:41:22,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2022-11-25 15:41:22,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2022-11-25 15:41:22,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:22,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2022-11-25 15:41:22,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 15:41:22,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:22,758 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states 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 15:41:22,758 INFO L175 Difference]: Start difference. First operand has 39 places, 25 transitions, 153 flow. Second operand 4 states and 360 transitions. [2022-11-25 15:41:22,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 203 flow [2022-11-25 15:41:22,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 165 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-11-25 15:41:22,763 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 107 flow [2022-11-25 15:41:22,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2022-11-25 15:41:22,764 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2022-11-25 15:41:22,764 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 107 flow [2022-11-25 15:41:22,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 15:41:22,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:22,765 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:22,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:41:22,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1340363083, now seen corresponding path program 1 times [2022-11-25 15:41:22,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:22,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120572673] [2022-11-25 15:41:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:22,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:22,927 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 15:41:22,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:22,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120572673] [2022-11-25 15:41:22,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120572673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:22,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:22,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:41:22,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034541627] [2022-11-25 15:41:22,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:22,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:41:22,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:22,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:41:22,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:41:23,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2022-11-25 15:41:23,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 73.33333333333333) internal successors, (440), 6 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 15:41:23,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:23,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2022-11-25 15:41:23,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:23,199 INFO L130 PetriNetUnfolder]: 50/91 cut-off events. [2022-11-25 15:41:23,200 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 15:41:23,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 91 events. 50/91 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 207 event pairs, 5 based on Foata normal form. 2/93 useless extension candidates. Maximal degree in co-relation 250. Up to 54 conditions per place. [2022-11-25 15:41:23,201 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 25 selfloop transitions, 13 changer transitions 0/38 dead transitions. [2022-11-25 15:41:23,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 236 flow [2022-11-25 15:41:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:41:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:41:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2022-11-25 15:41:23,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-11-25 15:41:23,205 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2022-11-25 15:41:23,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2022-11-25 15:41:23,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:23,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2022-11-25 15:41:23,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 15:41:23,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:23,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:23,212 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 107 flow. Second operand 6 states and 468 transitions. [2022-11-25 15:41:23,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 236 flow [2022-11-25 15:41:23,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:23,214 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 163 flow [2022-11-25 15:41:23,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2022-11-25 15:41:23,216 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2022-11-25 15:41:23,216 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 163 flow [2022-11-25 15:41:23,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.33333333333333) internal successors, (440), 6 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 15:41:23,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:23,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:23,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:41:23,218 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash -277718142, now seen corresponding path program 2 times [2022-11-25 15:41:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:23,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144706826] [2022-11-25 15:41:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:23,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:23,409 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 15:41:23,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144706826] [2022-11-25 15:41:23,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144706826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:23,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:23,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:41:23,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576872793] [2022-11-25 15:41:23,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:23,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:41:23,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:41:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:41:23,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2022-11-25 15:41:23,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:23,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:23,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2022-11-25 15:41:23,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:23,671 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2022-11-25 15:41:23,671 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-25 15:41:23,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 98 events. 53/98 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 235 event pairs, 4 based on Foata normal form. 4/102 useless extension candidates. Maximal degree in co-relation 328. Up to 59 conditions per place. [2022-11-25 15:41:23,673 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 30 selfloop transitions, 14 changer transitions 0/44 dead transitions. [2022-11-25 15:41:23,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 310 flow [2022-11-25 15:41:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:41:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:41:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 611 transitions. [2022-11-25 15:41:23,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2022-11-25 15:41:23,677 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 611 transitions. [2022-11-25 15:41:23,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 611 transitions. [2022-11-25 15:41:23,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:23,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 611 transitions. [2022-11-25 15:41:23,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 76.375) internal successors, (611), 8 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 15:41:23,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:23,683 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:23,684 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 163 flow. Second operand 8 states and 611 transitions. [2022-11-25 15:41:23,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 310 flow [2022-11-25 15:41:23,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 291 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:23,686 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 184 flow [2022-11-25 15:41:23,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2022-11-25 15:41:23,688 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2022-11-25 15:41:23,688 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 184 flow [2022-11-25 15:41:23,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:23,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:23,689 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:23,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:41:23,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:23,690 INFO L85 PathProgramCache]: Analyzing trace with hash -277429842, now seen corresponding path program 3 times [2022-11-25 15:41:23,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:23,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922567409] [2022-11-25 15:41:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:23,814 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 15:41:23,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:23,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922567409] [2022-11-25 15:41:23,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922567409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:23,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:23,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:41:23,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709010406] [2022-11-25 15:41:23,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:23,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:41:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:41:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:41:23,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2022-11-25 15:41:23,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 73.33333333333333) internal successors, (440), 6 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 15:41:23,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:23,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2022-11-25 15:41:23,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:24,043 INFO L130 PetriNetUnfolder]: 63/114 cut-off events. [2022-11-25 15:41:24,043 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-11-25 15:41:24,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 114 events. 63/114 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 278 event pairs, 9 based on Foata normal form. 4/116 useless extension candidates. Maximal degree in co-relation 411. Up to 70 conditions per place. [2022-11-25 15:41:24,045 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 29 selfloop transitions, 15 changer transitions 0/44 dead transitions. [2022-11-25 15:41:24,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 352 flow [2022-11-25 15:41:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:41:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:41:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2022-11-25 15:41:24,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-11-25 15:41:24,048 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2022-11-25 15:41:24,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2022-11-25 15:41:24,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:24,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2022-11-25 15:41:24,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 15:41:24,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:24,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:24,053 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 184 flow. Second operand 6 states and 468 transitions. [2022-11-25 15:41:24,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 352 flow [2022-11-25 15:41:24,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 305 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-25 15:41:24,056 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 223 flow [2022-11-25 15:41:24,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2022-11-25 15:41:24,057 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2022-11-25 15:41:24,057 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 223 flow [2022-11-25 15:41:24,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.33333333333333) internal successors, (440), 6 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 15:41:24,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:24,058 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:24,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 15:41:24,058 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:24,059 INFO L85 PathProgramCache]: Analyzing trace with hash -277391683, now seen corresponding path program 2 times [2022-11-25 15:41:24,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:24,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005490350] [2022-11-25 15:41:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:24,160 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 15:41:24,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005490350] [2022-11-25 15:41:24,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005490350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:24,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:24,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:41:24,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672378036] [2022-11-25 15:41:24,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:24,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:41:24,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:41:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:41:24,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2022-11-25 15:41:24,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:24,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2022-11-25 15:41:24,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:24,387 INFO L130 PetriNetUnfolder]: 64/117 cut-off events. [2022-11-25 15:41:24,388 INFO L131 PetriNetUnfolder]: For 247/247 co-relation queries the response was YES. [2022-11-25 15:41:24,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 117 events. 64/117 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 300 event pairs, 6 based on Foata normal form. 2/117 useless extension candidates. Maximal degree in co-relation 456. Up to 55 conditions per place. [2022-11-25 15:41:24,389 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 33 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2022-11-25 15:41:24,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 391 flow [2022-11-25 15:41:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:41:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:41:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 605 transitions. [2022-11-25 15:41:24,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474852071005917 [2022-11-25 15:41:24,393 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 605 transitions. [2022-11-25 15:41:24,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 605 transitions. [2022-11-25 15:41:24,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:24,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 605 transitions. [2022-11-25 15:41:24,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 75.625) internal successors, (605), 8 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,398 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,399 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 223 flow. Second operand 8 states and 605 transitions. [2022-11-25 15:41:24,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 391 flow [2022-11-25 15:41:24,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 356 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:24,402 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 232 flow [2022-11-25 15:41:24,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2022-11-25 15:41:24,403 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2022-11-25 15:41:24,404 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 232 flow [2022-11-25 15:41:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:24,404 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 15:41:24,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -277429813, now seen corresponding path program 3 times [2022-11-25 15:41:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:24,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964758519] [2022-11-25 15:41:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:24,504 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 15:41:24,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964758519] [2022-11-25 15:41:24,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964758519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:24,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:24,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:41:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396108152] [2022-11-25 15:41:24,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:41:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:41:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:41:24,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2022-11-25 15:41:24,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:24,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2022-11-25 15:41:24,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:24,833 INFO L130 PetriNetUnfolder]: 65/120 cut-off events. [2022-11-25 15:41:24,833 INFO L131 PetriNetUnfolder]: For 268/268 co-relation queries the response was YES. [2022-11-25 15:41:24,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 120 events. 65/120 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 317 event pairs, 6 based on Foata normal form. 2/118 useless extension candidates. Maximal degree in co-relation 460. Up to 78 conditions per place. [2022-11-25 15:41:24,835 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 33 selfloop transitions, 16 changer transitions 0/49 dead transitions. [2022-11-25 15:41:24,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 408 flow [2022-11-25 15:41:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:41:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:41:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 609 transitions. [2022-11-25 15:41:24,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4504437869822485 [2022-11-25 15:41:24,839 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 609 transitions. [2022-11-25 15:41:24,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 609 transitions. [2022-11-25 15:41:24,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:24,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 609 transitions. [2022-11-25 15:41:24,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 15:41:24,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,845 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,845 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 232 flow. Second operand 8 states and 609 transitions. [2022-11-25 15:41:24,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 408 flow [2022-11-25 15:41:24,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 372 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-25 15:41:24,849 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 244 flow [2022-11-25 15:41:24,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2022-11-25 15:41:24,850 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2022-11-25 15:41:24,850 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 244 flow [2022-11-25 15:41:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:24,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:24,851 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:24,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 15:41:24,851 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash -18462094, now seen corresponding path program 1 times [2022-11-25 15:41:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:24,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133428735] [2022-11-25 15:41:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:24,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:24,903 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 15:41:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:24,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133428735] [2022-11-25 15:41:24,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133428735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:24,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:24,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:41:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496732863] [2022-11-25 15:41:24,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:24,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:41:24,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:24,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:24,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:24,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:24,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:25,129 INFO L130 PetriNetUnfolder]: 102/193 cut-off events. [2022-11-25 15:41:25,130 INFO L131 PetriNetUnfolder]: For 593/593 co-relation queries the response was YES. [2022-11-25 15:41:25,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 193 events. 102/193 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 650 event pairs, 14 based on Foata normal form. 4/191 useless extension candidates. Maximal degree in co-relation 667. Up to 78 conditions per place. [2022-11-25 15:41:25,132 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 42 selfloop transitions, 22 changer transitions 4/68 dead transitions. [2022-11-25 15:41:25,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 577 flow [2022-11-25 15:41:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:41:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:41:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 554 transitions. [2022-11-25 15:41:25,135 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46830092983939137 [2022-11-25 15:41:25,135 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 554 transitions. [2022-11-25 15:41:25,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 554 transitions. [2022-11-25 15:41:25,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:25,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 554 transitions. [2022-11-25 15:41:25,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 15:41:25,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:41:25,141 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:41:25,141 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 244 flow. Second operand 7 states and 554 transitions. [2022-11-25 15:41:25,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 577 flow [2022-11-25 15:41:25,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 522 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-25 15:41:25,147 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 378 flow [2022-11-25 15:41:25,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=378, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2022-11-25 15:41:25,148 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2022-11-25 15:41:25,148 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 378 flow [2022-11-25 15:41:25,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:25,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:25,149 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:25,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 15:41:25,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:25,149 INFO L85 PathProgramCache]: Analyzing trace with hash -19326190, now seen corresponding path program 1 times [2022-11-25 15:41:25,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:25,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418518366] [2022-11-25 15:41:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:25,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:25,203 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 15:41:25,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:25,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418518366] [2022-11-25 15:41:25,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418518366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:25,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:25,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:41:25,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594300811] [2022-11-25 15:41:25,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:25,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:25,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:41:25,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:25,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 378 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:25,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:25,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:25,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:25,404 INFO L130 PetriNetUnfolder]: 111/214 cut-off events. [2022-11-25 15:41:25,405 INFO L131 PetriNetUnfolder]: For 1010/1010 co-relation queries the response was YES. [2022-11-25 15:41:25,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 214 events. 111/214 cut-off events. For 1010/1010 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 773 event pairs, 12 based on Foata normal form. 6/220 useless extension candidates. Maximal degree in co-relation 990. Up to 83 conditions per place. [2022-11-25 15:41:25,408 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 42 selfloop transitions, 19 changer transitions 2/63 dead transitions. [2022-11-25 15:41:25,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 642 flow [2022-11-25 15:41:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:41:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:41:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-11-25 15:41:25,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46942800788954636 [2022-11-25 15:41:25,411 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-11-25 15:41:25,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-11-25 15:41:25,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:25,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-11-25 15:41:25,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 15:41:25,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:25,416 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:25,416 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 378 flow. Second operand 6 states and 476 transitions. [2022-11-25 15:41:25,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 642 flow [2022-11-25 15:41:25,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 610 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:25,424 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 452 flow [2022-11-25 15:41:25,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2022-11-25 15:41:25,425 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2022-11-25 15:41:25,425 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 452 flow [2022-11-25 15:41:25,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:25,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:25,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:25,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 15:41:25,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash -19316735, now seen corresponding path program 1 times [2022-11-25 15:41:25,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:25,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217692712] [2022-11-25 15:41:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:25,475 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 15:41:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217692712] [2022-11-25 15:41:25,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217692712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:25,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141556400] [2022-11-25 15:41:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:25,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:25,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:25,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:25,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:41:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:25,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:41:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:25,654 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 15:41:25,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:25,708 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 15:41:25,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141556400] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:25,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:41:25,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2022-11-25 15:41:25,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500869209] [2022-11-25 15:41:25,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:25,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:25,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:25,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:25,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:41:25,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:25,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:25,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:25,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:25,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:26,014 INFO L130 PetriNetUnfolder]: 123/238 cut-off events. [2022-11-25 15:41:26,014 INFO L131 PetriNetUnfolder]: For 1787/1787 co-relation queries the response was YES. [2022-11-25 15:41:26,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 238 events. 123/238 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 900 event pairs, 20 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 1078. Up to 110 conditions per place. [2022-11-25 15:41:26,020 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 50 selfloop transitions, 22 changer transitions 0/72 dead transitions. [2022-11-25 15:41:26,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 771 flow [2022-11-25 15:41:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:41:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:41:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-11-25 15:41:26,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47928994082840237 [2022-11-25 15:41:26,024 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-11-25 15:41:26,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-11-25 15:41:26,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:26,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-11-25 15:41:26,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 15:41:26,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:26,029 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:26,029 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 452 flow. Second operand 6 states and 486 transitions. [2022-11-25 15:41:26,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 771 flow [2022-11-25 15:41:26,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 716 flow, removed 26 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:26,041 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 573 flow [2022-11-25 15:41:26,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2022-11-25 15:41:26,042 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2022-11-25 15:41:26,043 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 573 flow [2022-11-25 15:41:26,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:26,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:26,044 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:26,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:26,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:41:26,258 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash -19321569, now seen corresponding path program 1 times [2022-11-25 15:41:26,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:26,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253177482] [2022-11-25 15:41:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:26,334 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 15:41:26,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253177482] [2022-11-25 15:41:26,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253177482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848888131] [2022-11-25 15:41:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:26,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:26,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:26,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:41:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:26,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:41:26,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:26,451 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 15:41:26,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:26,520 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 15:41:26,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848888131] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:26,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:41:26,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2022-11-25 15:41:26,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612590200] [2022-11-25 15:41:26,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:26,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:41:26,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:26,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 573 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:26,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:26,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:26,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:26,764 INFO L130 PetriNetUnfolder]: 127/246 cut-off events. [2022-11-25 15:41:26,765 INFO L131 PetriNetUnfolder]: For 1754/1754 co-relation queries the response was YES. [2022-11-25 15:41:26,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 246 events. 127/246 cut-off events. For 1754/1754 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 941 event pairs, 8 based on Foata normal form. 6/252 useless extension candidates. Maximal degree in co-relation 1304. Up to 148 conditions per place. [2022-11-25 15:41:26,769 INFO L137 encePairwiseOnDemand]: 160/169 looper letters, 45 selfloop transitions, 24 changer transitions 0/69 dead transitions. [2022-11-25 15:41:26,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 799 flow [2022-11-25 15:41:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:41:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:41:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 404 transitions. [2022-11-25 15:41:26,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47810650887573963 [2022-11-25 15:41:26,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 404 transitions. [2022-11-25 15:41:26,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 404 transitions. [2022-11-25 15:41:26,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:26,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 404 transitions. [2022-11-25 15:41:26,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 15:41:26,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 15:41:26,780 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 15:41:26,781 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 573 flow. Second operand 5 states and 404 transitions. [2022-11-25 15:41:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 799 flow [2022-11-25 15:41:26,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 738 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-25 15:41:26,794 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 622 flow [2022-11-25 15:41:26,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=622, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2022-11-25 15:41:26,795 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2022-11-25 15:41:26,796 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 622 flow [2022-11-25 15:41:26,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:26,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:26,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:26,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:27,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:27,003 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -19326994, now seen corresponding path program 2 times [2022-11-25 15:41:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:27,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068629678] [2022-11-25 15:41:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:27,064 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 15:41:27,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:27,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068629678] [2022-11-25 15:41:27,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068629678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:27,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:27,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:41:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003574177] [2022-11-25 15:41:27,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:27,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:27,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:41:27,141 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:27,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 622 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:27,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:27,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:27,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:27,333 INFO L130 PetriNetUnfolder]: 117/228 cut-off events. [2022-11-25 15:41:27,333 INFO L131 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2022-11-25 15:41:27,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 228 events. 117/228 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 847 event pairs, 20 based on Foata normal form. 4/232 useless extension candidates. Maximal degree in co-relation 1305. Up to 108 conditions per place. [2022-11-25 15:41:27,336 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 51 selfloop transitions, 20 changer transitions 3/74 dead transitions. [2022-11-25 15:41:27,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 864 flow [2022-11-25 15:41:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:41:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:41:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 633 transitions. [2022-11-25 15:41:27,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4681952662721893 [2022-11-25 15:41:27,341 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 633 transitions. [2022-11-25 15:41:27,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 633 transitions. [2022-11-25 15:41:27,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:27,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 633 transitions. [2022-11-25 15:41:27,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.125) internal successors, (633), 8 states have internal predecessors, (633), 0 states have call successors, (0), 0 states 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 15:41:27,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:27,346 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:27,347 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 622 flow. Second operand 8 states and 633 transitions. [2022-11-25 15:41:27,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 864 flow [2022-11-25 15:41:27,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 851 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 15:41:27,361 INFO L231 Difference]: Finished difference. Result has 77 places, 52 transitions, 610 flow [2022-11-25 15:41:27,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=610, PETRI_PLACES=77, PETRI_TRANSITIONS=52} [2022-11-25 15:41:27,363 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2022-11-25 15:41:27,364 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 52 transitions, 610 flow [2022-11-25 15:41:27,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:27,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:27,364 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:27,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 15:41:27,365 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:27,365 INFO L85 PathProgramCache]: Analyzing trace with hash -9206860, now seen corresponding path program 2 times [2022-11-25 15:41:27,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:27,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573250271] [2022-11-25 15:41:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:27,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:27,420 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 15:41:27,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:27,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573250271] [2022-11-25 15:41:27,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573250271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:27,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:27,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:41:27,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720009776] [2022-11-25 15:41:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:27,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:27,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:41:27,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:27,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 52 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:27,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:27,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:27,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:27,646 INFO L130 PetriNetUnfolder]: 149/288 cut-off events. [2022-11-25 15:41:27,647 INFO L131 PetriNetUnfolder]: For 2493/2493 co-relation queries the response was YES. [2022-11-25 15:41:27,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 288 events. 149/288 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1140 event pairs, 28 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 1703. Up to 110 conditions per place. [2022-11-25 15:41:27,652 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 50 selfloop transitions, 29 changer transitions 2/81 dead transitions. [2022-11-25 15:41:27,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 1057 flow [2022-11-25 15:41:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:41:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:41:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 550 transitions. [2022-11-25 15:41:27,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46491969568892644 [2022-11-25 15:41:27,658 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 550 transitions. [2022-11-25 15:41:27,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 550 transitions. [2022-11-25 15:41:27,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:27,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 550 transitions. [2022-11-25 15:41:27,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.57142857142857) internal successors, (550), 7 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 15:41:27,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:41:27,668 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 15:41:27,668 INFO L175 Difference]: Start difference. First operand has 77 places, 52 transitions, 610 flow. Second operand 7 states and 550 transitions. [2022-11-25 15:41:27,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 1057 flow [2022-11-25 15:41:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 1015 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 15:41:27,684 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 835 flow [2022-11-25 15:41:27,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2022-11-25 15:41:27,685 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 58 predicate places. [2022-11-25 15:41:27,685 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 835 flow [2022-11-25 15:41:27,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:27,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:27,686 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:27,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 15:41:27,686 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:27,687 INFO L85 PathProgramCache]: Analyzing trace with hash -10389694, now seen corresponding path program 3 times [2022-11-25 15:41:27,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:27,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008308102] [2022-11-25 15:41:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:27,744 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 15:41:27,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:27,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008308102] [2022-11-25 15:41:27,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008308102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:27,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:27,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:41:27,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451320090] [2022-11-25 15:41:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:27,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:27,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:27,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:41:27,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:27,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 835 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:27,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:27,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:27,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:27,960 INFO L130 PetriNetUnfolder]: 129/256 cut-off events. [2022-11-25 15:41:27,961 INFO L131 PetriNetUnfolder]: For 2589/2589 co-relation queries the response was YES. [2022-11-25 15:41:27,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1725 conditions, 256 events. 129/256 cut-off events. For 2589/2589 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1011 event pairs, 10 based on Foata normal form. 12/268 useless extension candidates. Maximal degree in co-relation 1625. Up to 106 conditions per place. [2022-11-25 15:41:27,965 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 53 selfloop transitions, 21 changer transitions 2/76 dead transitions. [2022-11-25 15:41:27,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 76 transitions, 1072 flow [2022-11-25 15:41:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:41:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:41:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-11-25 15:41:27,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46942800788954636 [2022-11-25 15:41:27,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-11-25 15:41:27,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-11-25 15:41:27,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:27,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-11-25 15:41:27,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 15:41:27,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:27,973 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:27,973 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 835 flow. Second operand 6 states and 476 transitions. [2022-11-25 15:41:27,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 76 transitions, 1072 flow [2022-11-25 15:41:27,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 76 transitions, 1033 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:27,998 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 798 flow [2022-11-25 15:41:27,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=798, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2022-11-25 15:41:27,999 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 63 predicate places. [2022-11-25 15:41:28,000 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 798 flow [2022-11-25 15:41:28,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:28,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:28,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:28,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 15:41:28,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash -10384269, now seen corresponding path program 2 times [2022-11-25 15:41:28,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:28,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692492917] [2022-11-25 15:41:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:28,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:28,079 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 15:41:28,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692492917] [2022-11-25 15:41:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692492917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229015400] [2022-11-25 15:41:28,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:41:28,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:28,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:28,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:28,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:41:28,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:41:28,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:41:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:28,194 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 15:41:28,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:28,241 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 15:41:28,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229015400] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:28,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:41:28,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2022-11-25 15:41:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899427515] [2022-11-25 15:41:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:41:28,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:28,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 798 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:28,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:28,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:28,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:28,477 INFO L130 PetriNetUnfolder]: 120/231 cut-off events. [2022-11-25 15:41:28,477 INFO L131 PetriNetUnfolder]: For 2531/2531 co-relation queries the response was YES. [2022-11-25 15:41:28,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 231 events. 120/231 cut-off events. For 2531/2531 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 843 event pairs, 24 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 1481. Up to 130 conditions per place. [2022-11-25 15:41:28,482 INFO L137 encePairwiseOnDemand]: 160/169 looper letters, 50 selfloop transitions, 27 changer transitions 0/77 dead transitions. [2022-11-25 15:41:28,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 77 transitions, 1038 flow [2022-11-25 15:41:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:41:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:41:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 483 transitions. [2022-11-25 15:41:28,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47633136094674555 [2022-11-25 15:41:28,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 483 transitions. [2022-11-25 15:41:28,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 483 transitions. [2022-11-25 15:41:28,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:28,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 483 transitions. [2022-11-25 15:41:28,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:28,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:28,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 15:41:28,490 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 798 flow. Second operand 6 states and 483 transitions. [2022-11-25 15:41:28,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 77 transitions, 1038 flow [2022-11-25 15:41:28,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 77 transitions, 1015 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:28,504 INFO L231 Difference]: Finished difference. Result has 93 places, 61 transitions, 870 flow [2022-11-25 15:41:28,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=870, PETRI_PLACES=93, PETRI_TRANSITIONS=61} [2022-11-25 15:41:28,505 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2022-11-25 15:41:28,506 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 61 transitions, 870 flow [2022-11-25 15:41:28,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:28,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:28,506 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:28,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:28,713 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash -10379464, now seen corresponding path program 4 times [2022-11-25 15:41:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:28,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62373487] [2022-11-25 15:41:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:28,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:28,765 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 15:41:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:28,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62373487] [2022-11-25 15:41:28,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62373487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:28,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:28,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:41:28,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316249832] [2022-11-25 15:41:28,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:28,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:28,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:28,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:41:28,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:28,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 61 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:28,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:28,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:28,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:28,965 INFO L130 PetriNetUnfolder]: 115/216 cut-off events. [2022-11-25 15:41:28,965 INFO L131 PetriNetUnfolder]: For 2552/2552 co-relation queries the response was YES. [2022-11-25 15:41:28,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 216 events. 115/216 cut-off events. For 2552/2552 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 736 event pairs, 10 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 1484. Up to 156 conditions per place. [2022-11-25 15:41:28,969 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 48 selfloop transitions, 17 changer transitions 0/65 dead transitions. [2022-11-25 15:41:28,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 65 transitions, 984 flow [2022-11-25 15:41:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:41:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:41:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 396 transitions. [2022-11-25 15:41:28,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4686390532544379 [2022-11-25 15:41:28,972 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 396 transitions. [2022-11-25 15:41:28,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 396 transitions. [2022-11-25 15:41:28,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:28,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 396 transitions. [2022-11-25 15:41:28,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.2) internal successors, (396), 5 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 15:41:28,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 15:41:28,976 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states 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 15:41:28,977 INFO L175 Difference]: Start difference. First operand has 93 places, 61 transitions, 870 flow. Second operand 5 states and 396 transitions. [2022-11-25 15:41:28,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 65 transitions, 984 flow [2022-11-25 15:41:28,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 65 transitions, 907 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-11-25 15:41:28,990 INFO L231 Difference]: Finished difference. Result has 88 places, 58 transitions, 772 flow [2022-11-25 15:41:28,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=772, PETRI_PLACES=88, PETRI_TRANSITIONS=58} [2022-11-25 15:41:28,991 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 62 predicate places. [2022-11-25 15:41:28,991 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 58 transitions, 772 flow [2022-11-25 15:41:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:28,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:28,993 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:28,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 15:41:28,993 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:28,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash -10388890, now seen corresponding path program 3 times [2022-11-25 15:41:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:28,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417490403] [2022-11-25 15:41:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:29,039 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 15:41:29,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:29,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417490403] [2022-11-25 15:41:29,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417490403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:41:29,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:41:29,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:41:29,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533939414] [2022-11-25 15:41:29,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:41:29,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:41:29,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:29,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:41:29,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:41:29,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:29,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 58 transitions, 772 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:29,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:29,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:29,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:29,281 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2022-11-25 15:41:29,281 INFO L131 PetriNetUnfolder]: For 2006/2006 co-relation queries the response was YES. [2022-11-25 15:41:29,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 208 events. 111/208 cut-off events. For 2006/2006 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 695 event pairs, 20 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 1338. Up to 92 conditions per place. [2022-11-25 15:41:29,285 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 49 selfloop transitions, 23 changer transitions 1/73 dead transitions. [2022-11-25 15:41:29,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 73 transitions, 979 flow [2022-11-25 15:41:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:41:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:41:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 628 transitions. [2022-11-25 15:41:29,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46449704142011833 [2022-11-25 15:41:29,288 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 628 transitions. [2022-11-25 15:41:29,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 628 transitions. [2022-11-25 15:41:29,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:29,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 628 transitions. [2022-11-25 15:41:29,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 15:41:29,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:29,294 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 169.0) internal successors, (1521), 9 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:29,294 INFO L175 Difference]: Start difference. First operand has 88 places, 58 transitions, 772 flow. Second operand 8 states and 628 transitions. [2022-11-25 15:41:29,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 73 transitions, 979 flow [2022-11-25 15:41:29,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 946 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 15:41:29,306 INFO L231 Difference]: Finished difference. Result has 90 places, 55 transitions, 738 flow [2022-11-25 15:41:29,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=738, PETRI_PLACES=90, PETRI_TRANSITIONS=55} [2022-11-25 15:41:29,307 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 64 predicate places. [2022-11-25 15:41:29,307 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 55 transitions, 738 flow [2022-11-25 15:41:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:41:29,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:29,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:29,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 15:41:29,308 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2031924081, now seen corresponding path program 1 times [2022-11-25 15:41:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:29,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160856712] [2022-11-25 15:41:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:29,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160856712] [2022-11-25 15:41:29,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160856712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388563097] [2022-11-25 15:41:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:29,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:29,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:29,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:29,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:41:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:29,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:41:29,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:29,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:29,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388563097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:29,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:29,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 15:41:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443003741] [2022-11-25 15:41:29,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:29,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:41:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:41:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:41:30,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 169 [2022-11-25 15:41:30,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 55 transitions, 738 flow. Second operand has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:30,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:30,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 169 [2022-11-25 15:41:30,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:30,774 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2022-11-25 15:41:30,774 INFO L131 PetriNetUnfolder]: For 2162/2162 co-relation queries the response was YES. [2022-11-25 15:41:30,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1550 conditions, 216 events. 117/216 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 745 event pairs, 0 based on Foata normal form. 8/224 useless extension candidates. Maximal degree in co-relation 1374. Up to 57 conditions per place. [2022-11-25 15:41:30,778 INFO L137 encePairwiseOnDemand]: 160/169 looper letters, 35 selfloop transitions, 32 changer transitions 28/95 dead transitions. [2022-11-25 15:41:30,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 95 transitions, 1185 flow [2022-11-25 15:41:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:41:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 15:41:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1405 transitions. [2022-11-25 15:41:30,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4375583930239801 [2022-11-25 15:41:30,785 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1405 transitions. [2022-11-25 15:41:30,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1405 transitions. [2022-11-25 15:41:30,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:30,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1405 transitions. [2022-11-25 15:41:30,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.94736842105263) internal successors, (1405), 19 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 15:41:30,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 169.0) internal successors, (3380), 20 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states 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 15:41:30,798 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 169.0) internal successors, (3380), 20 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states 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 15:41:30,798 INFO L175 Difference]: Start difference. First operand has 90 places, 55 transitions, 738 flow. Second operand 19 states and 1405 transitions. [2022-11-25 15:41:30,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 95 transitions, 1185 flow [2022-11-25 15:41:30,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 1051 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-25 15:41:30,812 INFO L231 Difference]: Finished difference. Result has 97 places, 43 transitions, 563 flow [2022-11-25 15:41:30,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=563, PETRI_PLACES=97, PETRI_TRANSITIONS=43} [2022-11-25 15:41:30,813 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2022-11-25 15:41:30,814 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 43 transitions, 563 flow [2022-11-25 15:41:30,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:30,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:30,815 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:30,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 15:41:31,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -390411899, now seen corresponding path program 1 times [2022-11-25 15:41:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:31,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115370699] [2022-11-25 15:41:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:31,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:31,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115370699] [2022-11-25 15:41:31,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115370699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:31,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137560591] [2022-11-25 15:41:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:31,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:31,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:41:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:31,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:41:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:31,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:31,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137560591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:31,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:31,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 15:41:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207389048] [2022-11-25 15:41:31,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:31,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:41:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:41:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:41:31,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:31,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 43 transitions, 563 flow. Second operand has 11 states, 11 states have (on average 74.45454545454545) internal successors, (819), 11 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 15:41:31,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:31,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:31,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:31,617 INFO L130 PetriNetUnfolder]: 86/159 cut-off events. [2022-11-25 15:41:31,618 INFO L131 PetriNetUnfolder]: For 1278/1278 co-relation queries the response was YES. [2022-11-25 15:41:31,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 159 events. 86/159 cut-off events. For 1278/1278 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 474 event pairs, 3 based on Foata normal form. 4/163 useless extension candidates. Maximal degree in co-relation 1014. Up to 61 conditions per place. [2022-11-25 15:41:31,621 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 37 selfloop transitions, 28 changer transitions 0/65 dead transitions. [2022-11-25 15:41:31,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 65 transitions, 877 flow [2022-11-25 15:41:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:41:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:41:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 772 transitions. [2022-11-25 15:41:31,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45680473372781066 [2022-11-25 15:41:31,624 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 772 transitions. [2022-11-25 15:41:31,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 772 transitions. [2022-11-25 15:41:31,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:31,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 772 transitions. [2022-11-25 15:41:31,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.2) internal successors, (772), 10 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 15:41:31,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 169.0) internal successors, (1859), 11 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states 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 15:41:31,630 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 169.0) internal successors, (1859), 11 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states 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 15:41:31,630 INFO L175 Difference]: Start difference. First operand has 97 places, 43 transitions, 563 flow. Second operand 10 states and 772 transitions. [2022-11-25 15:41:31,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 65 transitions, 877 flow [2022-11-25 15:41:31,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 612 flow, removed 46 selfloop flow, removed 24 redundant places. [2022-11-25 15:41:31,638 INFO L231 Difference]: Finished difference. Result has 74 places, 49 transitions, 513 flow [2022-11-25 15:41:31,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=513, PETRI_PLACES=74, PETRI_TRANSITIONS=49} [2022-11-25 15:41:31,639 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2022-11-25 15:41:31,640 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 49 transitions, 513 flow [2022-11-25 15:41:31,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.45454545454545) internal successors, (819), 11 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 15:41:31,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:31,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:31,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:31,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 15:41:31,847 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash -566783284, now seen corresponding path program 2 times [2022-11-25 15:41:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:31,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63883147] [2022-11-25 15:41:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:31,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:31,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63883147] [2022-11-25 15:41:31,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63883147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:31,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95337115] [2022-11-25 15:41:31,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:41:31,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:31,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:31,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:32,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:41:32,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:41:32,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:32,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:41:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:32,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:32,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95337115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:32,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:32,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 15:41:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092259463] [2022-11-25 15:41:32,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:32,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:41:32,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:41:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:41:32,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 169 [2022-11-25 15:41:32,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 49 transitions, 513 flow. Second operand has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:32,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:32,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 169 [2022-11-25 15:41:32,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:32,932 INFO L130 PetriNetUnfolder]: 92/169 cut-off events. [2022-11-25 15:41:32,933 INFO L131 PetriNetUnfolder]: For 994/994 co-relation queries the response was YES. [2022-11-25 15:41:32,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 169 events. 92/169 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 504 event pairs, 2 based on Foata normal form. 10/179 useless extension candidates. Maximal degree in co-relation 946. Up to 61 conditions per place. [2022-11-25 15:41:32,935 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 26 selfloop transitions, 16 changer transitions 29/71 dead transitions. [2022-11-25 15:41:32,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 811 flow [2022-11-25 15:41:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:41:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:41:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 884 transitions. [2022-11-25 15:41:32,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2022-11-25 15:41:32,939 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 884 transitions. [2022-11-25 15:41:32,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 884 transitions. [2022-11-25 15:41:32,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:32,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 884 transitions. [2022-11-25 15:41:32,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 73.66666666666667) internal successors, (884), 12 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 15:41:32,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states 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 15:41:32,946 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states 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 15:41:32,947 INFO L175 Difference]: Start difference. First operand has 74 places, 49 transitions, 513 flow. Second operand 12 states and 884 transitions. [2022-11-25 15:41:32,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 811 flow [2022-11-25 15:41:32,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 71 transitions, 721 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-11-25 15:41:32,954 INFO L231 Difference]: Finished difference. Result has 81 places, 34 transitions, 322 flow [2022-11-25 15:41:32,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=81, PETRI_TRANSITIONS=34} [2022-11-25 15:41:32,955 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 55 predicate places. [2022-11-25 15:41:32,955 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 34 transitions, 322 flow [2022-11-25 15:41:32,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:32,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:32,956 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:32,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:33,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 15:41:33,163 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash -598818064, now seen corresponding path program 3 times [2022-11-25 15:41:33,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:33,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906380169] [2022-11-25 15:41:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:33,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:33,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906380169] [2022-11-25 15:41:33,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906380169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:33,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535169893] [2022-11-25 15:41:33,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:41:33,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:33,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:33,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:33,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:41:33,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:41:33,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:41:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:33,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:33,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535169893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:33,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:33,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-25 15:41:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450515160] [2022-11-25 15:41:33,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:41:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:41:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:41:33,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 169 [2022-11-25 15:41:33,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 34 transitions, 322 flow. Second operand has 19 states, 19 states have (on average 71.57894736842105) internal successors, (1360), 19 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 15:41:33,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:33,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 169 [2022-11-25 15:41:33,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:34,389 INFO L130 PetriNetUnfolder]: 71/144 cut-off events. [2022-11-25 15:41:34,390 INFO L131 PetriNetUnfolder]: For 760/760 co-relation queries the response was YES. [2022-11-25 15:41:34,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 144 events. 71/144 cut-off events. For 760/760 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 453 event pairs, 1 based on Foata normal form. 14/158 useless extension candidates. Maximal degree in co-relation 820. Up to 43 conditions per place. [2022-11-25 15:41:34,392 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 25 selfloop transitions, 31 changer transitions 14/70 dead transitions. [2022-11-25 15:41:34,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 70 transitions, 745 flow [2022-11-25 15:41:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:41:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 15:41:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1390 transitions. [2022-11-25 15:41:34,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43288695110557457 [2022-11-25 15:41:34,397 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1390 transitions. [2022-11-25 15:41:34,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1390 transitions. [2022-11-25 15:41:34,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:34,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1390 transitions. [2022-11-25 15:41:34,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.15789473684211) internal successors, (1390), 19 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states 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 15:41:34,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 169.0) internal successors, (3380), 20 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states 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 15:41:34,408 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 169.0) internal successors, (3380), 20 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states 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 15:41:34,409 INFO L175 Difference]: Start difference. First operand has 81 places, 34 transitions, 322 flow. Second operand 19 states and 1390 transitions. [2022-11-25 15:41:34,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 70 transitions, 745 flow [2022-11-25 15:41:34,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 70 transitions, 644 flow, removed 35 selfloop flow, removed 11 redundant places. [2022-11-25 15:41:34,415 INFO L231 Difference]: Finished difference. Result has 80 places, 41 transitions, 448 flow [2022-11-25 15:41:34,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=448, PETRI_PLACES=80, PETRI_TRANSITIONS=41} [2022-11-25 15:41:34,416 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2022-11-25 15:41:34,416 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 41 transitions, 448 flow [2022-11-25 15:41:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 71.57894736842105) internal successors, (1360), 19 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 15:41:34,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:34,417 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:34,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:34,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 15:41:34,623 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash -321757114, now seen corresponding path program 4 times [2022-11-25 15:41:34,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:34,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208779929] [2022-11-25 15:41:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:34,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:34,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:34,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208779929] [2022-11-25 15:41:34,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208779929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:34,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257691067] [2022-11-25 15:41:34,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:41:34,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:34,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:34,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:34,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:41:34,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:41:34,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:34,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:41:34,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:34,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:35,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257691067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:35,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:35,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 15:41:35,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048750256] [2022-11-25 15:41:35,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:35,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:41:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:41:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:41:35,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 169 [2022-11-25 15:41:35,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 41 transitions, 448 flow. Second operand has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:35,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:35,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 169 [2022-11-25 15:41:35,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:35,743 INFO L130 PetriNetUnfolder]: 71/148 cut-off events. [2022-11-25 15:41:35,743 INFO L131 PetriNetUnfolder]: For 661/661 co-relation queries the response was YES. [2022-11-25 15:41:35,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 148 events. 71/148 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 480 event pairs, 0 based on Foata normal form. 10/158 useless extension candidates. Maximal degree in co-relation 837. Up to 47 conditions per place. [2022-11-25 15:41:35,745 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 26 selfloop transitions, 19 changer transitions 22/67 dead transitions. [2022-11-25 15:41:35,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 67 transitions, 813 flow [2022-11-25 15:41:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:41:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:41:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1095 transitions. [2022-11-25 15:41:35,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4319526627218935 [2022-11-25 15:41:35,752 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1095 transitions. [2022-11-25 15:41:35,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1095 transitions. [2022-11-25 15:41:35,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:35,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1095 transitions. [2022-11-25 15:41:35,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.0) internal successors, (1095), 15 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 15:41:35,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states 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 15:41:35,782 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states 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 15:41:35,782 INFO L175 Difference]: Start difference. First operand has 80 places, 41 transitions, 448 flow. Second operand 15 states and 1095 transitions. [2022-11-25 15:41:35,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 67 transitions, 813 flow [2022-11-25 15:41:35,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 67 transitions, 682 flow, removed 39 selfloop flow, removed 10 redundant places. [2022-11-25 15:41:35,790 INFO L231 Difference]: Finished difference. Result has 83 places, 37 transitions, 371 flow [2022-11-25 15:41:35,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=371, PETRI_PLACES=83, PETRI_TRANSITIONS=37} [2022-11-25 15:41:35,791 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 57 predicate places. [2022-11-25 15:41:35,791 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 37 transitions, 371 flow [2022-11-25 15:41:35,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:35,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:35,792 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:35,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:35,998 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1456928428, now seen corresponding path program 5 times [2022-11-25 15:41:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:35,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552287826] [2022-11-25 15:41:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:35,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:36,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:36,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552287826] [2022-11-25 15:41:36,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552287826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:36,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553364557] [2022-11-25 15:41:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:41:36,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:36,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:36,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:41:36,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:41:36,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:41:36,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:36,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:36,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553364557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:36,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:36,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-11-25 15:41:36,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868077197] [2022-11-25 15:41:36,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:36,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:41:36,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:41:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:41:36,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 169 [2022-11-25 15:41:36,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 37 transitions, 371 flow. Second operand has 10 states, 10 states have (on average 74.6) internal successors, (746), 10 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 15:41:36,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:36,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 169 [2022-11-25 15:41:36,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:36,620 INFO L130 PetriNetUnfolder]: 45/98 cut-off events. [2022-11-25 15:41:36,621 INFO L131 PetriNetUnfolder]: For 485/485 co-relation queries the response was YES. [2022-11-25 15:41:36,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 98 events. 45/98 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 257 event pairs, 8 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 525. Up to 48 conditions per place. [2022-11-25 15:41:36,623 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 27 selfloop transitions, 21 changer transitions 0/48 dead transitions. [2022-11-25 15:41:36,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 48 transitions, 502 flow [2022-11-25 15:41:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:41:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 15:41:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 842 transitions. [2022-11-25 15:41:36,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45293168370091447 [2022-11-25 15:41:36,630 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 842 transitions. [2022-11-25 15:41:36,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 842 transitions. [2022-11-25 15:41:36,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:36,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 842 transitions. [2022-11-25 15:41:36,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.54545454545455) internal successors, (842), 11 states have internal predecessors, (842), 0 states have call successors, (0), 0 states 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 15:41:36,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:36,642 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:36,642 INFO L175 Difference]: Start difference. First operand has 83 places, 37 transitions, 371 flow. Second operand 11 states and 842 transitions. [2022-11-25 15:41:36,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 48 transitions, 502 flow [2022-11-25 15:41:36,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 48 transitions, 435 flow, removed 8 selfloop flow, removed 14 redundant places. [2022-11-25 15:41:36,647 INFO L231 Difference]: Finished difference. Result has 72 places, 36 transitions, 334 flow [2022-11-25 15:41:36,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=72, PETRI_TRANSITIONS=36} [2022-11-25 15:41:36,652 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2022-11-25 15:41:36,653 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 36 transitions, 334 flow [2022-11-25 15:41:36,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 74.6) internal successors, (746), 10 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 15:41:36,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:36,654 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:36,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:36,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 15:41:36,860 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-25 15:41:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash -274999504, now seen corresponding path program 6 times [2022-11-25 15:41:36,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:36,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375841004] [2022-11-25 15:41:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:36,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:41:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375841004] [2022-11-25 15:41:36,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375841004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:41:36,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726158705] [2022-11-25 15:41:36,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:41:36,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:36,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:41:36,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:41:36,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:41:37,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:41:37,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:41:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:37,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:41:37,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726158705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:37,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:41:37,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 15:41:37,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414901721] [2022-11-25 15:41:37,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:37,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:41:37,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:41:37,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:41:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:41:37,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 169 [2022-11-25 15:41:37,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 36 transitions, 334 flow. Second operand has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:37,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:37,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 169 [2022-11-25 15:41:37,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:41:37,921 INFO L130 PetriNetUnfolder]: 40/87 cut-off events. [2022-11-25 15:41:37,922 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2022-11-25 15:41:37,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 87 events. 40/87 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 0 based on Foata normal form. 8/95 useless extension candidates. Maximal degree in co-relation 415. Up to 31 conditions per place. [2022-11-25 15:41:37,923 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2022-11-25 15:41:37,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 47 transitions, 445 flow [2022-11-25 15:41:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:41:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:41:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1018 transitions. [2022-11-25 15:41:37,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43026204564666104 [2022-11-25 15:41:37,929 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1018 transitions. [2022-11-25 15:41:37,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1018 transitions. [2022-11-25 15:41:37,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:37,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1018 transitions. [2022-11-25 15:41:37,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 72.71428571428571) internal successors, (1018), 14 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states 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 15:41:37,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:37,938 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:37,939 INFO L175 Difference]: Start difference. First operand has 72 places, 36 transitions, 334 flow. Second operand 14 states and 1018 transitions. [2022-11-25 15:41:37,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 47 transitions, 445 flow [2022-11-25 15:41:37,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 47 transitions, 392 flow, removed 6 selfloop flow, removed 9 redundant places. [2022-11-25 15:41:37,943 INFO L231 Difference]: Finished difference. Result has 70 places, 0 transitions, 0 flow [2022-11-25 15:41:37,943 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=70, PETRI_TRANSITIONS=0} [2022-11-25 15:41:37,945 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 44 predicate places. [2022-11-25 15:41:37,946 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 0 transitions, 0 flow [2022-11-25 15:41:37,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states 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 15:41:37,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 18 remaining) [2022-11-25 15:41:37,953 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2022-11-25 15:41:37,953 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2022-11-25 15:41:37,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2022-11-25 15:41:37,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2022-11-25 15:41:37,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2022-11-25 15:41:37,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2022-11-25 15:41:37,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2022-11-25 15:41:37,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 18 remaining) [2022-11-25 15:41:37,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 18 remaining) [2022-11-25 15:41:37,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 18 remaining) [2022-11-25 15:41:37,955 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 18 remaining) [2022-11-25 15:41:37,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2022-11-25 15:41:37,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2022-11-25 15:41:37,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2022-11-25 15:41:37,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2022-11-25 15:41:37,957 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2022-11-25 15:41:37,957 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2022-11-25 15:41:37,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 15:41:38,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:41:38,163 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:38,169 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 15:41:38,169 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 15:41:38,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 03:41:38 BasicIcfg [2022-11-25 15:41:38,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 15:41:38,174 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 15:41:38,174 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 15:41:38,174 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 15:41:38,175 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:41:17" (3/4) ... [2022-11-25 15:41:38,178 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 15:41:38,185 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-11-25 15:41:38,185 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-11-25 15:41:38,190 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-11-25 15:41:38,190 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 15:41:38,191 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 15:41:38,191 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 15:41:38,227 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 15:41:38,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 15:41:38,228 INFO L158 Benchmark]: Toolchain (without parser) took 22190.89ms. Allocated memory was 209.7MB in the beginning and 302.0MB in the end (delta: 92.3MB). Free memory was 165.8MB in the beginning and 180.1MB in the end (delta: -14.3MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2022-11-25 15:41:38,228 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 138.4MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:41:38,229 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.19ms. Allocated memory is still 209.7MB. Free memory was 165.8MB in the beginning and 155.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 15:41:38,229 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.29ms. Allocated memory is still 209.7MB. Free memory was 154.4MB in the beginning and 153.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:41:38,230 INFO L158 Benchmark]: Boogie Preprocessor took 66.66ms. Allocated memory is still 209.7MB. Free memory was 153.3MB in the beginning and 151.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 15:41:38,230 INFO L158 Benchmark]: RCFGBuilder took 739.66ms. Allocated memory is still 209.7MB. Free memory was 151.5MB in the beginning and 137.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-25 15:41:38,231 INFO L158 Benchmark]: TraceAbstraction took 20990.52ms. Allocated memory was 209.7MB in the beginning and 302.0MB in the end (delta: 92.3MB). Free memory was 137.1MB in the beginning and 183.3MB in the end (delta: -46.2MB). Peak memory consumption was 48.3MB. Max. memory is 16.1GB. [2022-11-25 15:41:38,231 INFO L158 Benchmark]: Witness Printer took 53.55ms. Allocated memory is still 302.0MB. Free memory was 183.3MB in the beginning and 180.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 15:41:38,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 138.4MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.19ms. Allocated memory is still 209.7MB. Free memory was 165.8MB in the beginning and 155.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.29ms. Allocated memory is still 209.7MB. Free memory was 154.4MB in the beginning and 153.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 66.66ms. Allocated memory is still 209.7MB. Free memory was 153.3MB in the beginning and 151.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 739.66ms. Allocated memory is still 209.7MB. Free memory was 151.5MB in the beginning and 137.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 20990.52ms. Allocated memory was 209.7MB in the beginning and 302.0MB in the end (delta: 92.3MB). Free memory was 137.1MB in the beginning and 183.3MB in the end (delta: -46.2MB). Peak memory consumption was 48.3MB. Max. memory is 16.1GB. * Witness Printer took 53.55ms. Allocated memory is still 302.0MB. Free memory was 183.3MB in the beginning and 180.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 79 PlacesBefore, 26 PlacesAfterwards, 77 TransitionsBefore, 21 TransitionsAfterwards, 1088 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 0 ConcurrentYvCompositions, 3 ChoiceCompositions, 71 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 937, independent: 930, independent conditional: 0, independent unconditional: 930, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 587, independent: 583, independent conditional: 0, independent unconditional: 583, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 587, independent: 583, independent conditional: 0, independent unconditional: 583, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 31, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 937, independent: 347, independent conditional: 0, independent unconditional: 347, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 587, unknown conditional: 0, unknown unconditional: 587] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 47]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 47]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 44]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 44]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 60]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 60]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 57]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 57]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 127 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 20.7s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2624 SdHoareTripleChecker+Valid, 5.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2106 mSDsluCounter, 1343 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1106 mSDsCounter, 416 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6051 IncrementalHoareTripleChecker+Invalid, 6467 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 416 mSolverCounterUnsat, 237 mSDtfsCounter, 6051 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=870occurred in iteration=20, InterpolantAutomatonStates: 231, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 341 NumberOfCodeBlocks, 341 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 391 ConstructedInterpolants, 0 QuantifiedInterpolants, 1639 SizeOfPredicates, 21 NumberOfNonLiveVariables, 996 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 49 InterpolantComputations, 22 PerfectInterpolantSequences, 20/70 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 15:41:38,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9c90b03-c9c7-4770-9d86-b2e15b792308/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE