./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8 --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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- 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-2329fc7 [2022-12-13 12:37:37,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:37:37,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:37:37,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:37:37,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:37:37,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:37:37,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:37:37,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:37:37,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:37:37,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:37:37,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:37:37,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:37:37,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:37:37,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:37:37,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:37:37,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:37:37,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:37:37,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:37:37,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:37:37,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:37:37,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:37:37,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:37:37,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:37:37,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:37:37,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:37:37,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:37:37,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:37:37,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:37:37,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:37:37,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:37:37,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:37:37,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:37:37,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:37:37,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:37:37,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:37:37,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:37:37,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:37:37,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:37:37,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:37:37,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:37:37,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:37:37,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 12:37:37,669 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:37:37,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:37:37,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:37:37,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:37:37,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:37:37,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:37:37,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:37:37,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:37:37,672 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:37:37,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:37:37,672 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:37:37,672 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:37:37,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:37:37,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:37:37,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:37:37,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:37:37,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:37:37,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:37:37,674 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 12:37:37,674 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:37:37,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:37:37,674 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:37:37,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:37:37,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:37:37,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:37:37,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:37:37,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:37:37,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:37:37,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:37:37,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:37:37,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:37:37,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:37:37,676 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:37:37,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:37:37,681 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:37:37,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:37:37,681 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:37:37,682 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_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-12-13 12:37:37,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:37:37,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:37:37,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:37:37,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:37:37,881 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:37:37,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-13 12:37:40,442 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:37:40,586 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:37:40,586 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-13 12:37:40,591 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/data/4964f825f/871e815e9566440faa168cbd6666259f/FLAGcd43cb135 [2022-12-13 12:37:40,996 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/data/4964f825f/871e815e9566440faa168cbd6666259f [2022-12-13 12:37:40,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:37:40,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:37:41,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:37:41,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:37:41,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:37:41,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:37:40" (1/1) ... [2022-12-13 12:37:41,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2006a93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41, skipping insertion in model container [2022-12-13 12:37:41,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:37:40" (1/1) ... [2022-12-13 12:37:41,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:37:41,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:37:41,165 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,167 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,168 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,177 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,178 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,187 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_23ae4bb9-9ec3-478b-8509-73dbc363a108/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-13 12:37:41,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:37:41,201 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:37:41,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,216 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,217 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,219 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,219 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,220 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:37:41,222 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:37:41,227 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_23ae4bb9-9ec3-478b-8509-73dbc363a108/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-13 12:37:41,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:37:41,244 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:37:41,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41 WrapperNode [2022-12-13 12:37:41,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:37:41,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:37:41,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:37:41,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:37:41,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,299 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 265 [2022-12-13 12:37:41,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:37:41,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:37:41,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:37:41,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:37:41,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:37:41,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:37:41,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:37:41,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:37:41,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (1/1) ... [2022-12-13 12:37:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:37:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:37:41,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:37:41,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:37:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:37:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:37:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:37:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:37:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:37:41,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:37:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:37:41,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:37:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 12:37:41,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 12:37:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:37:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:37:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:37:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:37:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:37:41,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:37:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:37:41,401 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:37:41,499 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:37:41,501 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:37:41,840 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:37:41,963 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:37:41,963 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 12:37:41,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:37:41 BoogieIcfgContainer [2022-12-13 12:37:41,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:37:41,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:37:41,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:37:41,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:37:41,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:37:40" (1/3) ... [2022-12-13 12:37:41,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8e4318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:37:41, skipping insertion in model container [2022-12-13 12:37:41,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:37:41" (2/3) ... [2022-12-13 12:37:41,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8e4318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:37:41, skipping insertion in model container [2022-12-13 12:37:41,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:37:41" (3/3) ... [2022-12-13 12:37:41,975 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-12-13 12:37:41,983 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 12:37:41,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:37:41,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-12-13 12:37:41,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:37:42,061 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 12:37:42,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 240 transitions, 504 flow [2022-12-13 12:37:42,192 INFO L130 PetriNetUnfolder]: 18/237 cut-off events. [2022-12-13 12:37:42,193 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:37:42,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 237 events. 18/237 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 219 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 194. Up to 3 conditions per place. [2022-12-13 12:37:42,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 240 transitions, 504 flow [2022-12-13 12:37:42,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 216 transitions, 447 flow [2022-12-13 12:37:42,208 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:37:42,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 216 transitions, 447 flow [2022-12-13 12:37:42,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 216 transitions, 447 flow [2022-12-13 12:37:42,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 216 transitions, 447 flow [2022-12-13 12:37:42,262 INFO L130 PetriNetUnfolder]: 17/216 cut-off events. [2022-12-13 12:37:42,263 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:37:42,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 216 events. 17/216 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 217 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 194. Up to 3 conditions per place. [2022-12-13 12:37:42,266 INFO L119 LiptonReduction]: Number of co-enabled transitions 3252 [2022-12-13 12:37:51,030 INFO L134 LiptonReduction]: Checked pairs total: 6445 [2022-12-13 12:37:51,031 INFO L136 LiptonReduction]: Total number of compositions: 242 [2022-12-13 12:37:51,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:37:51,052 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;@6ea0f10e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:37:51,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 12:37:51,054 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 12:37:51,054 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:37:51,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:37:51,055 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:37:51,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:37:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:37:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash 35922, now seen corresponding path program 1 times [2022-12-13 12:37:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:37:51,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122448342] [2022-12-13 12:37:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:37:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:51,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:37:51,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122448342] [2022-12-13 12:37:51,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122448342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:37:51,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:37:51,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:37:51,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212873194] [2022-12-13 12:37:51,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:37:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:37:51,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:37:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:37:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:37:51,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2022-12-13 12:37:51,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:51,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:37:51,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2022-12-13 12:37:51,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:37:52,476 INFO L130 PetriNetUnfolder]: 6213/8035 cut-off events. [2022-12-13 12:37:52,476 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-12-13 12:37:52,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16382 conditions, 8035 events. 6213/8035 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 39320 event pairs, 3335 based on Foata normal form. 0/2647 useless extension candidates. Maximal degree in co-relation 7334. Up to 3991 conditions per place. [2022-12-13 12:37:52,515 INFO L137 encePairwiseOnDemand]: 468/482 looper letters, 65 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2022-12-13 12:37:52,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 312 flow [2022-12-13 12:37:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:37:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:37:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-12-13 12:37:52,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47164591977869985 [2022-12-13 12:37:52,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-12-13 12:37:52,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-12-13 12:37:52,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:37:52,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-12-13 12:37:52,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:52,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:52,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:52,559 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 107 flow. Second operand 3 states and 682 transitions. [2022-12-13 12:37:52,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 312 flow [2022-12-13 12:37:52,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 72 transitions, 294 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:37:52,569 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 122 flow [2022-12-13 12:37:52,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-13 12:37:52,574 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2022-12-13 12:37:52,574 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 122 flow [2022-12-13 12:37:52,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:52,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:37:52,575 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:37:52,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:37:52,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:37:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:37:52,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1115683, now seen corresponding path program 1 times [2022-12-13 12:37:52,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:37:52,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407758034] [2022-12-13 12:37:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:52,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:37:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:52,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:37:52,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407758034] [2022-12-13 12:37:52,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407758034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:37:52,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65968706] [2022-12-13 12:37:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:52,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:37:52,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:37:52,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:37:52,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:37:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:52,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:37:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:37:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:52,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:37:52,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65968706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:37:52,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:37:52,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-12-13 12:37:52,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399645842] [2022-12-13 12:37:52,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:37:52,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:37:52,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:37:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:37:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:37:52,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2022-12-13 12:37:52,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:52,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:37:52,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2022-12-13 12:37:52,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:37:53,669 INFO L130 PetriNetUnfolder]: 6213/8033 cut-off events. [2022-12-13 12:37:53,669 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 12:37:53,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16266 conditions, 8033 events. 6213/8033 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 39287 event pairs, 3335 based on Foata normal form. 0/2651 useless extension candidates. Maximal degree in co-relation 8127. Up to 3991 conditions per place. [2022-12-13 12:37:53,708 INFO L137 encePairwiseOnDemand]: 476/482 looper letters, 63 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2022-12-13 12:37:53,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 70 transitions, 312 flow [2022-12-13 12:37:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:37:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:37:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 865 transitions. [2022-12-13 12:37:53,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4486514522821577 [2022-12-13 12:37:53,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 865 transitions. [2022-12-13 12:37:53,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 865 transitions. [2022-12-13 12:37:53,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:37:53,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 865 transitions. [2022-12-13 12:37:53,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:53,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:53,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:53,716 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 122 flow. Second operand 4 states and 865 transitions. [2022-12-13 12:37:53,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 70 transitions, 312 flow [2022-12-13 12:37:53,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:37:53,718 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 114 flow [2022-12-13 12:37:53,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2022-12-13 12:37:53,719 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2022-12-13 12:37:53,719 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 114 flow [2022-12-13 12:37:53,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:53,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:37:53,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:37:53,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:37:53,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 12:37:53,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:37:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:37:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1115695, now seen corresponding path program 1 times [2022-12-13 12:37:53,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:37:53,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754822429] [2022-12-13 12:37:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:53,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:37:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:37:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754822429] [2022-12-13 12:37:53,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754822429] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:37:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510876238] [2022-12-13 12:37:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:53,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:37:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:37:53,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:37:53,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:37:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:37:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:37:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:54,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:37:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:54,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510876238] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:37:54,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:37:54,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 12:37:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255554046] [2022-12-13 12:37:54,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:37:54,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:37:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:37:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:37:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:37:54,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2022-12-13 12:37:54,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 200.14285714285714) internal successors, (1401), 7 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:54,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:37:54,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2022-12-13 12:37:54,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:37:56,111 INFO L130 PetriNetUnfolder]: 15519/20066 cut-off events. [2022-12-13 12:37:56,112 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-12-13 12:37:56,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40617 conditions, 20066 events. 15519/20066 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 106988 event pairs, 8336 based on Foata normal form. 0/6677 useless extension candidates. Maximal degree in co-relation 32443. Up to 3994 conditions per place. [2022-12-13 12:37:56,187 INFO L137 encePairwiseOnDemand]: 476/482 looper letters, 150 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2022-12-13 12:37:56,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 166 transitions, 738 flow [2022-12-13 12:37:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:37:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:37:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1363 transitions. [2022-12-13 12:37:56,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47130013831258644 [2022-12-13 12:37:56,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1363 transitions. [2022-12-13 12:37:56,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1363 transitions. [2022-12-13 12:37:56,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:37:56,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1363 transitions. [2022-12-13 12:37:56,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 227.16666666666666) internal successors, (1363), 6 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:56,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:56,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:56,199 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 114 flow. Second operand 6 states and 1363 transitions. [2022-12-13 12:37:56,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 166 transitions, 738 flow [2022-12-13 12:37:56,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 166 transitions, 730 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:37:56,201 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 205 flow [2022-12-13 12:37:56,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2022-12-13 12:37:56,202 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2022-12-13 12:37:56,202 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 205 flow [2022-12-13 12:37:56,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.14285714285714) internal successors, (1401), 7 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:56,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:37:56,203 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 12:37:56,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 12:37:56,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:37:56,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:37:56,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:37:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1113094289, now seen corresponding path program 1 times [2022-12-13 12:37:56,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:37:56,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033405911] [2022-12-13 12:37:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:56,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:37:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:56,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:37:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033405911] [2022-12-13 12:37:56,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033405911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:37:56,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:37:56,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:37:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730026924] [2022-12-13 12:37:56,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:37:56,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:37:56,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:37:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:37:56,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:37:56,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 482 [2022-12-13 12:37:56,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:56,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:37:56,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 482 [2022-12-13 12:37:56,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:37:58,513 INFO L130 PetriNetUnfolder]: 15561/20209 cut-off events. [2022-12-13 12:37:58,513 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-12-13 12:37:58,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40953 conditions, 20209 events. 15561/20209 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 109760 event pairs, 8355 based on Foata normal form. 135/6939 useless extension candidates. Maximal degree in co-relation 32453. Up to 19912 conditions per place. [2022-12-13 12:37:58,614 INFO L137 encePairwiseOnDemand]: 471/482 looper letters, 61 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2022-12-13 12:37:58,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 410 flow [2022-12-13 12:37:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:37:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:37:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2022-12-13 12:37:58,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43516597510373445 [2022-12-13 12:37:58,617 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2022-12-13 12:37:58,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2022-12-13 12:37:58,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:37:58,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2022-12-13 12:37:58,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:58,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:58,622 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:58,622 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 205 flow. Second operand 4 states and 839 transitions. [2022-12-13 12:37:58,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 410 flow [2022-12-13 12:37:58,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 384 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 12:37:58,625 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 209 flow [2022-12-13 12:37:58,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2022-12-13 12:37:58,625 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2022-12-13 12:37:58,625 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 209 flow [2022-12-13 12:37:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:58,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:37:58,626 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 12:37:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:37:58,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:37:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:37:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1120339810, now seen corresponding path program 2 times [2022-12-13 12:37:58,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:37:58,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156127480] [2022-12-13 12:37:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:58,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:37:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:58,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:37:58,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156127480] [2022-12-13 12:37:58,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156127480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:37:58,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688150932] [2022-12-13 12:37:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:37:58,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:37:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:37:58,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:37:58,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:37:58,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:37:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:37:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:37:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:37:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:37:58,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:37:58,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688150932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:37:58,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:37:58,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 12:37:58,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674593039] [2022-12-13 12:37:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:37:58,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:37:58,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:37:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:37:58,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:37:58,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 482 [2022-12-13 12:37:58,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:58,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:37:58,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 482 [2022-12-13 12:37:58,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:00,649 INFO L130 PetriNetUnfolder]: 15601/20248 cut-off events. [2022-12-13 12:38:00,650 INFO L131 PetriNetUnfolder]: For 1887/1887 co-relation queries the response was YES. [2022-12-13 12:38:00,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49693 conditions, 20248 events. 15601/20248 cut-off events. For 1887/1887 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 110251 event pairs, 8360 based on Foata normal form. 1/6809 useless extension candidates. Maximal degree in co-relation 49348. Up to 20088 conditions per place. [2022-12-13 12:38:00,738 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 40 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2022-12-13 12:38:00,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 291 flow [2022-12-13 12:38:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:38:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:38:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2022-12-13 12:38:00,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4412171507607192 [2022-12-13 12:38:00,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2022-12-13 12:38:00,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2022-12-13 12:38:00,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:00,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2022-12-13 12:38:00,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:00,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:00,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:00,747 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 209 flow. Second operand 3 states and 638 transitions. [2022-12-13 12:38:00,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 291 flow [2022-12-13 12:38:00,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 285 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 12:38:00,749 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 205 flow [2022-12-13 12:38:00,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2022-12-13 12:38:00,750 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2022-12-13 12:38:00,750 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 205 flow [2022-12-13 12:38:00,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:00,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:00,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:00,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:38:00,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:00,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash -363548480, now seen corresponding path program 1 times [2022-12-13 12:38:00,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:00,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575164388] [2022-12-13 12:38:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:00,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575164388] [2022-12-13 12:38:01,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575164388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624187790] [2022-12-13 12:38:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:01,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:01,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:01,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:38:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:01,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:38:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:01,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:38:01,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624187790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:01,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:38:01,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 12:38:01,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329240215] [2022-12-13 12:38:01,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:01,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:38:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:38:01,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:38:01,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 482 [2022-12-13 12:38:01,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:01,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:01,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 482 [2022-12-13 12:38:01,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:02,176 INFO L130 PetriNetUnfolder]: 9641/12738 cut-off events. [2022-12-13 12:38:02,176 INFO L131 PetriNetUnfolder]: For 1578/1578 co-relation queries the response was YES. [2022-12-13 12:38:02,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30506 conditions, 12738 events. 9641/12738 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 68430 event pairs, 5300 based on Foata normal form. 0/4983 useless extension candidates. Maximal degree in co-relation 30127. Up to 12648 conditions per place. [2022-12-13 12:38:02,215 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 42 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2022-12-13 12:38:02,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 279 flow [2022-12-13 12:38:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:38:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:38:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2022-12-13 12:38:02,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44467496542185336 [2022-12-13 12:38:02,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2022-12-13 12:38:02,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2022-12-13 12:38:02,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:02,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2022-12-13 12:38:02,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:02,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:02,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:02,219 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 205 flow. Second operand 3 states and 643 transitions. [2022-12-13 12:38:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 279 flow [2022-12-13 12:38:02,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:38:02,221 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 183 flow [2022-12-13 12:38:02,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-12-13 12:38:02,222 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2022-12-13 12:38:02,222 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 183 flow [2022-12-13 12:38:02,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:02,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:02,223 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 12:38:02,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:38:02,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 12:38:02,424 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:02,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:02,425 INFO L85 PathProgramCache]: Analyzing trace with hash -140806495, now seen corresponding path program 1 times [2022-12-13 12:38:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:02,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537366911] [2022-12-13 12:38:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:02,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537366911] [2022-12-13 12:38:02,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537366911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240757219] [2022-12-13 12:38:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:02,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:02,530 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:02,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:38:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:02,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 12:38:02,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:02,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:38:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:02,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240757219] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:38:02,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:38:02,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 12:38:02,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69311524] [2022-12-13 12:38:02,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:38:02,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:38:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:02,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:38:02,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:38:02,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2022-12-13 12:38:02,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 183 flow. Second operand has 13 states, 13 states have (on average 200.15384615384616) internal successors, (2602), 13 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:02,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:02,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2022-12-13 12:38:02,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:05,605 INFO L130 PetriNetUnfolder]: 21209/28020 cut-off events. [2022-12-13 12:38:05,605 INFO L131 PetriNetUnfolder]: For 3479/3479 co-relation queries the response was YES. [2022-12-13 12:38:05,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67065 conditions, 28020 events. 21209/28020 cut-off events. For 3479/3479 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 158549 event pairs, 11660 based on Foata normal form. 12/10981 useless extension candidates. Maximal degree in co-relation 67051. Up to 10242 conditions per place. [2022-12-13 12:38:05,710 INFO L137 encePairwiseOnDemand]: 477/482 looper letters, 290 selfloop transitions, 31 changer transitions 0/324 dead transitions. [2022-12-13 12:38:05,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 324 transitions, 1613 flow [2022-12-13 12:38:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:38:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:38:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2715 transitions. [2022-12-13 12:38:05,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46939834024896265 [2022-12-13 12:38:05,714 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2715 transitions. [2022-12-13 12:38:05,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2715 transitions. [2022-12-13 12:38:05,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:05,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2715 transitions. [2022-12-13 12:38:05,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 226.25) internal successors, (2715), 12 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:05,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:05,724 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 482.0) internal successors, (6266), 13 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:05,724 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 183 flow. Second operand 12 states and 2715 transitions. [2022-12-13 12:38:05,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 324 transitions, 1613 flow [2022-12-13 12:38:05,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 324 transitions, 1612 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:38:05,729 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 398 flow [2022-12-13 12:38:05,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=398, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2022-12-13 12:38:05,730 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2022-12-13 12:38:05,730 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 398 flow [2022-12-13 12:38:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 200.15384615384616) internal successors, (2602), 13 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:05,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:05,732 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:05,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:38:05,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 12:38:05,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:05,934 INFO L85 PathProgramCache]: Analyzing trace with hash -363548484, now seen corresponding path program 1 times [2022-12-13 12:38:05,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:05,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089923600] [2022-12-13 12:38:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:05,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:06,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089923600] [2022-12-13 12:38:06,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089923600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:06,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:38:06,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:38:06,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887263043] [2022-12-13 12:38:06,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:38:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:38:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:38:06,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 482 [2022-12-13 12:38:06,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:06,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:06,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 482 [2022-12-13 12:38:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:09,094 INFO L130 PetriNetUnfolder]: 28073/38305 cut-off events. [2022-12-13 12:38:09,094 INFO L131 PetriNetUnfolder]: For 3938/3938 co-relation queries the response was YES. [2022-12-13 12:38:09,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87061 conditions, 38305 events. 28073/38305 cut-off events. For 3938/3938 co-relation queries the response was YES. Maximal size of possible extension queue 1857. Compared 243789 event pairs, 10450 based on Foata normal form. 0/17086 useless extension candidates. Maximal degree in co-relation 87040. Up to 25304 conditions per place. [2022-12-13 12:38:09,237 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 82 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 12:38:09,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 621 flow [2022-12-13 12:38:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:38:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:38:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2022-12-13 12:38:09,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4598893499308437 [2022-12-13 12:38:09,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2022-12-13 12:38:09,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2022-12-13 12:38:09,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:09,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2022-12-13 12:38:09,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:09,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:09,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:09,242 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 398 flow. Second operand 3 states and 665 transitions. [2022-12-13 12:38:09,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 621 flow [2022-12-13 12:38:09,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 531 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-12-13 12:38:09,245 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 324 flow [2022-12-13 12:38:09,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2022-12-13 12:38:09,245 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2022-12-13 12:38:09,245 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 324 flow [2022-12-13 12:38:09,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:09,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:09,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:09,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 12:38:09,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1614901690, now seen corresponding path program 1 times [2022-12-13 12:38:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:09,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790435982] [2022-12-13 12:38:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:09,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790435982] [2022-12-13 12:38:09,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790435982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977363878] [2022-12-13 12:38:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:09,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:09,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:38:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:38:09,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:09,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:38:09,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977363878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:09,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:38:09,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-12-13 12:38:09,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222287258] [2022-12-13 12:38:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:09,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:38:09,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:38:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:38:09,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 482 [2022-12-13 12:38:09,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:09,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:09,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 482 [2022-12-13 12:38:09,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:12,796 INFO L130 PetriNetUnfolder]: 25136/34268 cut-off events. [2022-12-13 12:38:12,796 INFO L131 PetriNetUnfolder]: For 9136/9136 co-relation queries the response was YES. [2022-12-13 12:38:12,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83172 conditions, 34268 events. 25136/34268 cut-off events. For 9136/9136 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 220559 event pairs, 5214 based on Foata normal form. 0/18032 useless extension candidates. Maximal degree in co-relation 83151. Up to 17908 conditions per place. [2022-12-13 12:38:12,942 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 97 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2022-12-13 12:38:12,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 101 transitions, 604 flow [2022-12-13 12:38:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:38:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:38:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 882 transitions. [2022-12-13 12:38:12,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4574688796680498 [2022-12-13 12:38:12,945 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 882 transitions. [2022-12-13 12:38:12,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 882 transitions. [2022-12-13 12:38:12,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:12,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 882 transitions. [2022-12-13 12:38:12,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.5) internal successors, (882), 4 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:12,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:12,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:12,952 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 324 flow. Second operand 4 states and 882 transitions. [2022-12-13 12:38:12,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 101 transitions, 604 flow [2022-12-13 12:38:12,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 602 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:38:12,969 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 320 flow [2022-12-13 12:38:12,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2022-12-13 12:38:12,970 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2022-12-13 12:38:12,970 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 320 flow [2022-12-13 12:38:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:12,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:12,970 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:12,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:38:13,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:13,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1614901710, now seen corresponding path program 1 times [2022-12-13 12:38:13,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:13,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547071163] [2022-12-13 12:38:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:13,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:13,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547071163] [2022-12-13 12:38:13,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547071163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522543602] [2022-12-13 12:38:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:13,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:13,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:13,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:13,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:38:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:13,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:38:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:13,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:38:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:13,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522543602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:38:13,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:38:13,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 12:38:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387926746] [2022-12-13 12:38:13,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:38:13,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:38:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:38:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:38:13,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 482 [2022-12-13 12:38:13,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:13,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:13,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 482 [2022-12-13 12:38:13,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:19,325 INFO L130 PetriNetUnfolder]: 52438/71338 cut-off events. [2022-12-13 12:38:19,325 INFO L131 PetriNetUnfolder]: For 16572/16572 co-relation queries the response was YES. [2022-12-13 12:38:19,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171854 conditions, 71338 events. 52438/71338 cut-off events. For 16572/16572 co-relation queries the response was YES. Maximal size of possible extension queue 3186. Compared 494298 event pairs, 8954 based on Foata normal form. 0/38371 useless extension candidates. Maximal degree in co-relation 171833. Up to 20981 conditions per place. [2022-12-13 12:38:19,645 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 144 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2022-12-13 12:38:19,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 151 transitions, 840 flow [2022-12-13 12:38:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:38:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:38:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1340 transitions. [2022-12-13 12:38:19,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4633471645919779 [2022-12-13 12:38:19,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1340 transitions. [2022-12-13 12:38:19,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1340 transitions. [2022-12-13 12:38:19,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:19,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1340 transitions. [2022-12-13 12:38:19,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.33333333333334) internal successors, (1340), 6 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:19,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:19,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:19,653 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 320 flow. Second operand 6 states and 1340 transitions. [2022-12-13 12:38:19,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 151 transitions, 840 flow [2022-12-13 12:38:19,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 151 transitions, 837 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:38:19,669 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 359 flow [2022-12-13 12:38:19,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2022-12-13 12:38:19,669 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2022-12-13 12:38:19,669 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 359 flow [2022-12-13 12:38:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:19,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:19,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:19,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:38:19,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:38:19,872 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1386314166, now seen corresponding path program 1 times [2022-12-13 12:38:19,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:19,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355438326] [2022-12-13 12:38:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:19,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:19,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355438326] [2022-12-13 12:38:19,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355438326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:19,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:38:19,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:38:19,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937289447] [2022-12-13 12:38:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:19,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:38:19,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:19,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:38:19,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:38:19,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 482 [2022-12-13 12:38:19,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 359 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:19,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:19,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 482 [2022-12-13 12:38:19,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:26,413 INFO L130 PetriNetUnfolder]: 47070/64166 cut-off events. [2022-12-13 12:38:26,413 INFO L131 PetriNetUnfolder]: For 79151/81263 co-relation queries the response was YES. [2022-12-13 12:38:26,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164905 conditions, 64166 events. 47070/64166 cut-off events. For 79151/81263 co-relation queries the response was YES. Maximal size of possible extension queue 2824. Compared 403980 event pairs, 6446 based on Foata normal form. 3168/37744 useless extension candidates. Maximal degree in co-relation 164881. Up to 59313 conditions per place. [2022-12-13 12:38:26,712 INFO L137 encePairwiseOnDemand]: 472/482 looper letters, 77 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2022-12-13 12:38:26,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 613 flow [2022-12-13 12:38:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:38:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:38:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2022-12-13 12:38:26,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4508990318118949 [2022-12-13 12:38:26,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2022-12-13 12:38:26,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2022-12-13 12:38:26,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:26,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2022-12-13 12:38:26,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:26,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:26,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:26,717 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 359 flow. Second operand 3 states and 652 transitions. [2022-12-13 12:38:26,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 613 flow [2022-12-13 12:38:26,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 598 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 12:38:26,749 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 392 flow [2022-12-13 12:38:26,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2022-12-13 12:38:26,750 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2022-12-13 12:38:26,750 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 392 flow [2022-12-13 12:38:26,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:26,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:26,750 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:26,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 12:38:26,750 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1663312678, now seen corresponding path program 1 times [2022-12-13 12:38:26,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:26,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803682445] [2022-12-13 12:38:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:26,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:26,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803682445] [2022-12-13 12:38:26,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803682445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:26,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:38:26,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:38:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285498299] [2022-12-13 12:38:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:26,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:38:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:38:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:38:26,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 482 [2022-12-13 12:38:26,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 197.25) internal successors, (789), 4 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:26,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:26,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 482 [2022-12-13 12:38:26,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:32,941 INFO L130 PetriNetUnfolder]: 42935/58633 cut-off events. [2022-12-13 12:38:32,941 INFO L131 PetriNetUnfolder]: For 62121/64077 co-relation queries the response was YES. [2022-12-13 12:38:33,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181010 conditions, 58633 events. 42935/58633 cut-off events. For 62121/64077 co-relation queries the response was YES. Maximal size of possible extension queue 2723. Compared 368095 event pairs, 23273 based on Foata normal form. 2064/36495 useless extension candidates. Maximal degree in co-relation 180983. Up to 58177 conditions per place. [2022-12-13 12:38:33,280 INFO L137 encePairwiseOnDemand]: 474/482 looper letters, 69 selfloop transitions, 13 changer transitions 3/88 dead transitions. [2022-12-13 12:38:33,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 645 flow [2022-12-13 12:38:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:38:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:38:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2022-12-13 12:38:33,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4299792531120332 [2022-12-13 12:38:33,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2022-12-13 12:38:33,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2022-12-13 12:38:33,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:33,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2022-12-13 12:38:33,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:33,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:33,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 482.0) internal successors, (2410), 5 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:33,286 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 392 flow. Second operand 4 states and 829 transitions. [2022-12-13 12:38:33,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 645 flow [2022-12-13 12:38:33,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 88 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:38:33,319 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 441 flow [2022-12-13 12:38:33,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-12-13 12:38:33,320 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2022-12-13 12:38:33,320 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 441 flow [2022-12-13 12:38:33,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.25) internal successors, (789), 4 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:33,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:33,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:33,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 12:38:33,320 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2105181722, now seen corresponding path program 1 times [2022-12-13 12:38:33,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:33,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263738258] [2022-12-13 12:38:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:38:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:33,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263738258] [2022-12-13 12:38:33,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263738258] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:33,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:38:33,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:38:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461605422] [2022-12-13 12:38:33,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:33,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:38:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:38:33,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:38:33,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2022-12-13 12:38:33,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 441 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:33,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:33,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2022-12-13 12:38:33,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:38,566 INFO L130 PetriNetUnfolder]: 39184/53859 cut-off events. [2022-12-13 12:38:38,566 INFO L131 PetriNetUnfolder]: For 43814/43902 co-relation queries the response was YES. [2022-12-13 12:38:38,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167056 conditions, 53859 events. 39184/53859 cut-off events. For 43814/43902 co-relation queries the response was YES. Maximal size of possible extension queue 2612. Compared 334102 event pairs, 14702 based on Foata normal form. 132/31269 useless extension candidates. Maximal degree in co-relation 167027. Up to 53593 conditions per place. [2022-12-13 12:38:38,888 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 72 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2022-12-13 12:38:38,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 608 flow [2022-12-13 12:38:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:38:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:38:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2022-12-13 12:38:38,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4391424619640387 [2022-12-13 12:38:38,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2022-12-13 12:38:38,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2022-12-13 12:38:38,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:38,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2022-12-13 12:38:38,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:38,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:38,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:38,893 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 441 flow. Second operand 3 states and 635 transitions. [2022-12-13 12:38:38,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 608 flow [2022-12-13 12:38:38,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 581 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 12:38:38,933 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 431 flow [2022-12-13 12:38:38,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=431, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2022-12-13 12:38:38,933 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2022-12-13 12:38:38,933 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 431 flow [2022-12-13 12:38:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:38,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:38,934 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:38,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 12:38:38,934 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:38,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1610350672, now seen corresponding path program 2 times [2022-12-13 12:38:38,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:38,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331305498] [2022-12-13 12:38:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:38:38,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331305498] [2022-12-13 12:38:38,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331305498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941989900] [2022-12-13 12:38:38,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:38:38,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:38,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:39,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:39,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:38:39,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:38:39,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:38:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:38:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 12:38:39,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:38:39,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941989900] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:39,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:38:39,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 12:38:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214122656] [2022-12-13 12:38:39,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:39,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:38:39,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:38:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:38:39,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 482 [2022-12-13 12:38:39,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:39,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:39,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 482 [2022-12-13 12:38:39,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:44,116 INFO L130 PetriNetUnfolder]: 36302/50053 cut-off events. [2022-12-13 12:38:44,116 INFO L131 PetriNetUnfolder]: For 56299/56387 co-relation queries the response was YES. [2022-12-13 12:38:44,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158366 conditions, 50053 events. 36302/50053 cut-off events. For 56299/56387 co-relation queries the response was YES. Maximal size of possible extension queue 2425. Compared 310690 event pairs, 18960 based on Foata normal form. 1078/29909 useless extension candidates. Maximal degree in co-relation 158336. Up to 49921 conditions per place. [2022-12-13 12:38:44,428 INFO L137 encePairwiseOnDemand]: 480/482 looper letters, 67 selfloop transitions, 1 changer transitions 1/72 dead transitions. [2022-12-13 12:38:44,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 557 flow [2022-12-13 12:38:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:38:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:38:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-12-13 12:38:44,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44190871369294604 [2022-12-13 12:38:44,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-12-13 12:38:44,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-12-13 12:38:44,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:44,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-12-13 12:38:44,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:44,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:44,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:44,432 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 431 flow. Second operand 3 states and 639 transitions. [2022-12-13 12:38:44,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 557 flow [2022-12-13 12:38:44,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 544 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 12:38:44,463 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 402 flow [2022-12-13 12:38:44,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2022-12-13 12:38:44,464 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2022-12-13 12:38:44,464 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 402 flow [2022-12-13 12:38:44,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:44,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:44,464 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-12-13 12:38:44,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:38:44,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:44,665 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1836193249, now seen corresponding path program 2 times [2022-12-13 12:38:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:44,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864939492] [2022-12-13 12:38:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:44,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:44,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864939492] [2022-12-13 12:38:44,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864939492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:44,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313266855] [2022-12-13 12:38:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:38:44,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:44,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:44,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:44,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:38:44,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:38:44,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:38:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:38:44,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 12:38:44,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:38:44,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313266855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:38:44,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:38:44,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-12-13 12:38:44,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333818395] [2022-12-13 12:38:44,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:38:44,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:38:44,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:44,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:38:44,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:38:44,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 482 [2022-12-13 12:38:44,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:44,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:44,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 482 [2022-12-13 12:38:44,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:48,373 INFO L130 PetriNetUnfolder]: 25502/35295 cut-off events. [2022-12-13 12:38:48,373 INFO L131 PetriNetUnfolder]: For 25024/25064 co-relation queries the response was YES. [2022-12-13 12:38:48,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109694 conditions, 35295 events. 25502/35295 cut-off events. For 25024/25064 co-relation queries the response was YES. Maximal size of possible extension queue 1713. Compared 212215 event pairs, 12470 based on Foata normal form. 2082/22237 useless extension candidates. Maximal degree in co-relation 109667. Up to 35175 conditions per place. [2022-12-13 12:38:48,546 INFO L137 encePairwiseOnDemand]: 478/482 looper letters, 63 selfloop transitions, 1 changer transitions 1/68 dead transitions. [2022-12-13 12:38:48,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 502 flow [2022-12-13 12:38:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:38:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:38:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2022-12-13 12:38:48,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43291839557399725 [2022-12-13 12:38:48,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2022-12-13 12:38:48,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2022-12-13 12:38:48,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:48,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2022-12-13 12:38:48,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:48,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:48,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:48,551 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 402 flow. Second operand 3 states and 626 transitions. [2022-12-13 12:38:48,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 502 flow [2022-12-13 12:38:48,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 431 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-12-13 12:38:48,554 INFO L231 Difference]: Finished difference. Result has 59 places, 67 transitions, 296 flow [2022-12-13 12:38:48,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=59, PETRI_TRANSITIONS=67} [2022-12-13 12:38:48,554 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2022-12-13 12:38:48,554 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 67 transitions, 296 flow [2022-12-13 12:38:48,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:48,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:48,554 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:48,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:38:48,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 12:38:48,756 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1781545746, now seen corresponding path program 1 times [2022-12-13 12:38:48,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:48,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109232123] [2022-12-13 12:38:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:48,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:49,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:49,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109232123] [2022-12-13 12:38:49,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109232123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:49,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967424521] [2022-12-13 12:38:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:49,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:49,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:49,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:38:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:38:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:38:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:38:49,468 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 12:38:49,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-12-13 12:38:49,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 12:38:49,616 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 12:38:49,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 12:38:49,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:38:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:38:49,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:38:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:38:49,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:38:49,924 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 12:38:49,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-13 12:38:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:49,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:38:52,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:38:52,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-12-13 12:38:52,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:38:52,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1361 treesize of output 1301 [2022-12-13 12:38:52,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 643 treesize of output 595 [2022-12-13 12:38:52,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1238 treesize of output 1142 [2022-12-13 12:38:52,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1142 treesize of output 950 [2022-12-13 12:38:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:53,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967424521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:38:53,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:38:53,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-12-13 12:38:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525177279] [2022-12-13 12:38:53,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:38:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 12:38:53,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 12:38:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=510, Unknown=6, NotChecked=0, Total=600 [2022-12-13 12:38:53,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 482 [2022-12-13 12:38:53,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 67 transitions, 296 flow. Second operand has 25 states, 25 states have (on average 142.4) internal successors, (3560), 25 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:53,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:53,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 482 [2022-12-13 12:38:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:59,408 INFO L130 PetriNetUnfolder]: 35258/51198 cut-off events. [2022-12-13 12:38:59,408 INFO L131 PetriNetUnfolder]: For 33202/33315 co-relation queries the response was YES. [2022-12-13 12:38:59,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154468 conditions, 51198 events. 35258/51198 cut-off events. For 33202/33315 co-relation queries the response was YES. Maximal size of possible extension queue 2440. Compared 358371 event pairs, 7883 based on Foata normal form. 113/31739 useless extension candidates. Maximal degree in co-relation 154451. Up to 26239 conditions per place. [2022-12-13 12:38:59,608 INFO L137 encePairwiseOnDemand]: 467/482 looper letters, 142 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2022-12-13 12:38:59,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 182 transitions, 1144 flow [2022-12-13 12:38:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:38:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:38:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2374 transitions. [2022-12-13 12:38:59,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3078319502074689 [2022-12-13 12:38:59,613 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2374 transitions. [2022-12-13 12:38:59,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2374 transitions. [2022-12-13 12:38:59,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:59,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2374 transitions. [2022-12-13 12:38:59,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 148.375) internal successors, (2374), 16 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:59,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 482.0) internal successors, (8194), 17 states have internal predecessors, (8194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:59,622 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 482.0) internal successors, (8194), 17 states have internal predecessors, (8194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:59,622 INFO L175 Difference]: Start difference. First operand has 59 places, 67 transitions, 296 flow. Second operand 16 states and 2374 transitions. [2022-12-13 12:38:59,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 182 transitions, 1144 flow [2022-12-13 12:38:59,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 182 transitions, 1131 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 12:38:59,626 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 593 flow [2022-12-13 12:38:59,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=593, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2022-12-13 12:38:59,627 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2022-12-13 12:38:59,627 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 593 flow [2022-12-13 12:38:59,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 142.4) internal successors, (3560), 25 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:59,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:59,628 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:59,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:38:59,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:59,829 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:38:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash -154473127, now seen corresponding path program 1 times [2022-12-13 12:38:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:59,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627505645] [2022-12-13 12:38:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:59,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:39:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:39:00,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:39:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627505645] [2022-12-13 12:39:00,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627505645] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:39:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989857041] [2022-12-13 12:39:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:39:00,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:39:00,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:39:00,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:39:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:39:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:39:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:39:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:39:00,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 12:39:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:39:00,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:39:00,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:39:00,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-12-13 12:39:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:39:00,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989857041] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:39:00,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:39:00,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 12:39:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591277924] [2022-12-13 12:39:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:39:00,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 12:39:00,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:39:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 12:39:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-12-13 12:39:01,023 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 482 [2022-12-13 12:39:01,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 593 flow. Second operand has 17 states, 17 states have (on average 173.11764705882354) internal successors, (2943), 17 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:01,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:39:01,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 482 [2022-12-13 12:39:01,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:39:18,904 INFO L130 PetriNetUnfolder]: 109168/154106 cut-off events. [2022-12-13 12:39:18,904 INFO L131 PetriNetUnfolder]: For 261103/261286 co-relation queries the response was YES. [2022-12-13 12:39:19,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555855 conditions, 154106 events. 109168/154106 cut-off events. For 261103/261286 co-relation queries the response was YES. Maximal size of possible extension queue 7196. Compared 1182080 event pairs, 11030 based on Foata normal form. 2613/106063 useless extension candidates. Maximal degree in co-relation 555830. Up to 83189 conditions per place. [2022-12-13 12:39:19,820 INFO L137 encePairwiseOnDemand]: 470/482 looper letters, 314 selfloop transitions, 103 changer transitions 0/419 dead transitions. [2022-12-13 12:39:19,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 419 transitions, 3089 flow [2022-12-13 12:39:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 12:39:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 12:39:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3685 transitions. [2022-12-13 12:39:19,826 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3822614107883817 [2022-12-13 12:39:19,826 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3685 transitions. [2022-12-13 12:39:19,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3685 transitions. [2022-12-13 12:39:19,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:39:19,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3685 transitions. [2022-12-13 12:39:19,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 184.25) internal successors, (3685), 20 states have internal predecessors, (3685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:19,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 482.0) internal successors, (10122), 21 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:19,839 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 482.0) internal successors, (10122), 21 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:19,839 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 593 flow. Second operand 20 states and 3685 transitions. [2022-12-13 12:39:19,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 419 transitions, 3089 flow [2022-12-13 12:39:23,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 419 transitions, 3057 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-12-13 12:39:23,710 INFO L231 Difference]: Finished difference. Result has 112 places, 204 transitions, 1793 flow [2022-12-13 12:39:23,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1793, PETRI_PLACES=112, PETRI_TRANSITIONS=204} [2022-12-13 12:39:23,710 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2022-12-13 12:39:23,710 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 204 transitions, 1793 flow [2022-12-13 12:39:23,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 173.11764705882354) internal successors, (2943), 17 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:23,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:39:23,711 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:39:23,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:39:23,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 12:39:23,912 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:39:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:39:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1633681935, now seen corresponding path program 1 times [2022-12-13 12:39:23,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:39:23,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130274828] [2022-12-13 12:39:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:39:23,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:39:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:39:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:39:24,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:39:24,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130274828] [2022-12-13 12:39:24,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130274828] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:39:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048630634] [2022-12-13 12:39:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:39:24,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:39:24,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:39:24,183 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:39:24,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:39:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:39:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:39:24,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:39:24,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 12:39:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:39:24,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:39:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:39:24,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:39:24,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:39:24,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 12:39:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:39:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:39:24,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:39:24,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-12-13 12:39:24,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:39:24,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 681 treesize of output 653 [2022-12-13 12:39:24,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 295 [2022-12-13 12:39:24,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 614 treesize of output 566 [2022-12-13 12:39:24,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 566 treesize of output 470 [2022-12-13 12:39:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:39:25,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048630634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:39:25,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:39:25,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-12-13 12:39:25,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730833560] [2022-12-13 12:39:25,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:39:25,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:39:25,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:39:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:39:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=285, Unknown=8, NotChecked=0, Total=342 [2022-12-13 12:39:26,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 482 [2022-12-13 12:39:26,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 204 transitions, 1793 flow. Second operand has 19 states, 19 states have (on average 139.05263157894737) internal successors, (2642), 19 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:39:26,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:39:26,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 482 [2022-12-13 12:39:26,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:39:34,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:39:59,204 INFO L130 PetriNetUnfolder]: 125874/180687 cut-off events. [2022-12-13 12:39:59,204 INFO L131 PetriNetUnfolder]: For 1267347/1267533 co-relation queries the response was YES. [2022-12-13 12:39:59,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835439 conditions, 180687 events. 125874/180687 cut-off events. For 1267347/1267533 co-relation queries the response was YES. Maximal size of possible extension queue 9088. Compared 1457522 event pairs, 37506 based on Foata normal form. 705/131712 useless extension candidates. Maximal degree in co-relation 835398. Up to 107873 conditions per place. [2022-12-13 12:40:00,657 INFO L137 encePairwiseOnDemand]: 468/482 looper letters, 427 selfloop transitions, 168 changer transitions 4/601 dead transitions. [2022-12-13 12:40:00,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 601 transitions, 6400 flow [2022-12-13 12:40:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:40:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 12:40:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4630 transitions. [2022-12-13 12:40:00,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30018153526970953 [2022-12-13 12:40:00,664 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4630 transitions. [2022-12-13 12:40:00,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4630 transitions. [2022-12-13 12:40:00,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:40:00,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4630 transitions. [2022-12-13 12:40:00,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 144.6875) internal successors, (4630), 32 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:00,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 482.0) internal successors, (15906), 33 states have internal predecessors, (15906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:00,680 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 482.0) internal successors, (15906), 33 states have internal predecessors, (15906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:00,681 INFO L175 Difference]: Start difference. First operand has 112 places, 204 transitions, 1793 flow. Second operand 32 states and 4630 transitions. [2022-12-13 12:40:00,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 601 transitions, 6400 flow [2022-12-13 12:40:23,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 601 transitions, 6121 flow, removed 137 selfloop flow, removed 2 redundant places. [2022-12-13 12:40:23,501 INFO L231 Difference]: Finished difference. Result has 154 places, 322 transitions, 3513 flow [2022-12-13 12:40:23,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3513, PETRI_PLACES=154, PETRI_TRANSITIONS=322} [2022-12-13 12:40:23,501 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2022-12-13 12:40:23,501 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 322 transitions, 3513 flow [2022-12-13 12:40:23,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 139.05263157894737) internal successors, (2642), 19 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:23,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:40:23,502 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:40:23,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 12:40:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 12:40:23,703 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:40:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:40:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash 979929421, now seen corresponding path program 1 times [2022-12-13 12:40:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:40:23,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683752645] [2022-12-13 12:40:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:40:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:40:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:40:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:40:24,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:40:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683752645] [2022-12-13 12:40:24,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683752645] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:40:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162549211] [2022-12-13 12:40:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:40:24,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:40:24,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:40:24,082 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:40:24,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:40:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:40:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:40:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:40:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:40:24,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:40:24,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 12:40:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:40:24,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:40:24,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:40:24,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 44 [2022-12-13 12:40:24,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-12-13 12:40:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:40:24,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162549211] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:40:24,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:40:24,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 12:40:24,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545580427] [2022-12-13 12:40:24,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:40:24,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 12:40:24,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:40:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 12:40:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=315, Unknown=5, NotChecked=0, Total=380 [2022-12-13 12:40:25,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 482 [2022-12-13 12:40:25,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 322 transitions, 3513 flow. Second operand has 20 states, 20 states have (on average 150.8) internal successors, (3016), 20 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:40:25,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:40:25,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 482 [2022-12-13 12:40:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:40:28,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:40:32,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:41:12,409 INFO L130 PetriNetUnfolder]: 187985/268883 cut-off events. [2022-12-13 12:41:12,409 INFO L131 PetriNetUnfolder]: For 2164107/2164380 co-relation queries the response was YES. [2022-12-13 12:41:13,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284893 conditions, 268883 events. 187985/268883 cut-off events. For 2164107/2164380 co-relation queries the response was YES. Maximal size of possible extension queue 13214. Compared 2266302 event pairs, 17934 based on Foata normal form. 2019/195666 useless extension candidates. Maximal degree in co-relation 1284838. Up to 147046 conditions per place. [2022-12-13 12:41:14,990 INFO L137 encePairwiseOnDemand]: 467/482 looper letters, 410 selfloop transitions, 293 changer transitions 4/709 dead transitions. [2022-12-13 12:41:14,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 709 transitions, 8434 flow [2022-12-13 12:41:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 12:41:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 12:41:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4329 transitions. [2022-12-13 12:41:14,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3326417704011065 [2022-12-13 12:41:14,996 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4329 transitions. [2022-12-13 12:41:14,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4329 transitions. [2022-12-13 12:41:14,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:41:14,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4329 transitions. [2022-12-13 12:41:15,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 160.33333333333334) internal successors, (4329), 27 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:15,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 482.0) internal successors, (13496), 28 states have internal predecessors, (13496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:15,009 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 482.0) internal successors, (13496), 28 states have internal predecessors, (13496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:41:15,009 INFO L175 Difference]: Start difference. First operand has 154 places, 322 transitions, 3513 flow. Second operand 27 states and 4329 transitions. [2022-12-13 12:41:15,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 709 transitions, 8434 flow [2022-12-13 12:42:13,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 709 transitions, 8062 flow, removed 104 selfloop flow, removed 9 redundant places. [2022-12-13 12:42:13,643 INFO L231 Difference]: Finished difference. Result has 182 places, 459 transitions, 6277 flow [2022-12-13 12:42:13,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6277, PETRI_PLACES=182, PETRI_TRANSITIONS=459} [2022-12-13 12:42:13,644 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 132 predicate places. [2022-12-13 12:42:13,644 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 459 transitions, 6277 flow [2022-12-13 12:42:13,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 150.8) internal successors, (3016), 20 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:13,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:42:13,644 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:42:13,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:42:13,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:13,845 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:42:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:42:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1020851196, now seen corresponding path program 1 times [2022-12-13 12:42:13,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:42:13,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051822527] [2022-12-13 12:42:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:42:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:42:14,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:42:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051822527] [2022-12-13 12:42:14,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051822527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:42:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396527461] [2022-12-13 12:42:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:42:14,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:42:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:42:14,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:42:14,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:42:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:42:14,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:42:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:42:14,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 12:42:14,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:14,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 12:42:14,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:14,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 12:42:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:42:14,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 12:42:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:42:14,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:42:14,732 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_798 (Array Int Int)) (~q2_back~0 Int)) (or (not (< ~q2_back~0 c_~n2~0)) (not (<= 0 ~q2_back~0)) (<= 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_798) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648)))) is different from false [2022-12-13 12:42:14,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:42:14,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-12-13 12:42:14,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:42:14,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 347 [2022-12-13 12:42:14,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 282 [2022-12-13 12:42:14,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 134 [2022-12-13 12:42:14,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 246 [2022-12-13 12:42:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:42:15,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396527461] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:42:15,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:42:15,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2022-12-13 12:42:15,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489413046] [2022-12-13 12:42:15,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:42:15,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:42:15,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:42:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:42:15,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=318, Unknown=5, NotChecked=36, Total=420 [2022-12-13 12:42:15,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 482 [2022-12-13 12:42:15,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 459 transitions, 6277 flow. Second operand has 21 states, 21 states have (on average 145.85714285714286) internal successors, (3063), 21 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:42:15,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:42:15,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 482 [2022-12-13 12:42:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:43:01,465 INFO L130 PetriNetUnfolder]: 187665/268684 cut-off events. [2022-12-13 12:43:01,465 INFO L131 PetriNetUnfolder]: For 2809107/2809380 co-relation queries the response was YES. [2022-12-13 12:43:03,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1426169 conditions, 268684 events. 187665/268684 cut-off events. For 2809107/2809380 co-relation queries the response was YES. Maximal size of possible extension queue 13187. Compared 2260341 event pairs, 66971 based on Foata normal form. 1118/221216 useless extension candidates. Maximal degree in co-relation 1426104. Up to 152338 conditions per place. [2022-12-13 12:43:04,272 INFO L137 encePairwiseOnDemand]: 468/482 looper letters, 568 selfloop transitions, 220 changer transitions 2/792 dead transitions. [2022-12-13 12:43:04,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 792 transitions, 11837 flow [2022-12-13 12:43:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 12:43:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 12:43:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2004 transitions. [2022-12-13 12:43:04,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31982125758059365 [2022-12-13 12:43:04,276 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2004 transitions. [2022-12-13 12:43:04,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2004 transitions. [2022-12-13 12:43:04,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:43:04,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2004 transitions. [2022-12-13 12:43:04,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 154.15384615384616) internal successors, (2004), 13 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:04,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 482.0) internal successors, (6748), 14 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:04,283 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 482.0) internal successors, (6748), 14 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:43:04,283 INFO L175 Difference]: Start difference. First operand has 182 places, 459 transitions, 6277 flow. Second operand 13 states and 2004 transitions. [2022-12-13 12:43:04,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 792 transitions, 11837 flow [2022-12-13 12:45:36,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 792 transitions, 11337 flow, removed 239 selfloop flow, removed 3 redundant places. [2022-12-13 12:45:36,965 INFO L231 Difference]: Finished difference. Result has 196 places, 530 transitions, 7663 flow [2022-12-13 12:45:36,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7663, PETRI_PLACES=196, PETRI_TRANSITIONS=530} [2022-12-13 12:45:36,966 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2022-12-13 12:45:36,966 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 530 transitions, 7663 flow [2022-12-13 12:45:36,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 145.85714285714286) internal successors, (3063), 21 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:45:36,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:45:36,966 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:45:36,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 12:45:37,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:37,168 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 12:45:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 804000354, now seen corresponding path program 1 times [2022-12-13 12:45:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534287100] [2022-12-13 12:45:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:45:37,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534287100] [2022-12-13 12:45:37,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534287100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:45:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812225939] [2022-12-13 12:45:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:37,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:37,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:45:37,914 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:45:37,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ae4bb9-9ec3-478b-8509-73dbc363a108/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:45:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:37,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 12:45:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:45:38,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:45:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:45:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:45:38,032 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 12:45:38,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 12:45:38,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 12:45:38,140 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 12:45:38,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 12:45:38,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:45:38,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:45:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:45:38,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:45:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:45:38,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:45:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:45:38,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 12:45:38,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:45:38,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:45:38,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-12-13 12:45:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:45:38,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:45:38,473 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_865 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_865) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2022-12-13 12:45:38,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:45:38,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2022-12-13 12:45:38,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:45:38,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5667 treesize of output 5543 [2022-12-13 12:45:38,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5526 treesize of output 5334 [2022-12-13 12:45:38,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2715 treesize of output 2619 [2022-12-13 12:45:38,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5238 treesize of output 4854 [2022-12-13 12:45:38,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4854 treesize of output 4086 [2022-12-13 12:46:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:46:39,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812225939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:46:39,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:46:39,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 12:46:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013050819] [2022-12-13 12:46:39,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:46:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 12:46:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:46:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 12:46:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=588, Unknown=6, NotChecked=50, Total=756 [2022-12-13 12:46:41,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:43,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:45,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:47,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:49,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:51,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:53,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:55,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:57,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:46:59,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:02,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:04,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:06,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:08,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:10,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:12,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:14,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:16,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:18,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:20,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:22,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:24,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:26,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:26,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 482 [2022-12-13 12:47:26,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 530 transitions, 7663 flow. Second operand has 28 states, 28 states have (on average 141.46428571428572) internal successors, (3961), 28 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:47:26,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:47:26,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 482 [2022-12-13 12:47:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:47:28,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:30,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:47:38,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:48:36,204 INFO L130 PetriNetUnfolder]: 198096/286333 cut-off events. [2022-12-13 12:48:36,204 INFO L131 PetriNetUnfolder]: For 3370364/3370664 co-relation queries the response was YES. [2022-12-13 12:48:38,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593616 conditions, 286333 events. 198096/286333 cut-off events. For 3370364/3370664 co-relation queries the response was YES. Maximal size of possible extension queue 13647. Compared 2442706 event pairs, 51719 based on Foata normal form. 1334/237727 useless extension candidates. Maximal degree in co-relation 1593545. Up to 151581 conditions per place. [2022-12-13 12:48:39,699 INFO L137 encePairwiseOnDemand]: 466/482 looper letters, 480 selfloop transitions, 267 changer transitions 0/749 dead transitions. [2022-12-13 12:48:39,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 749 transitions, 11917 flow [2022-12-13 12:48:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 12:48:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 12:48:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2947 transitions. [2022-12-13 12:48:39,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3057053941908714 [2022-12-13 12:48:39,705 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2947 transitions. [2022-12-13 12:48:39,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2947 transitions. [2022-12-13 12:48:39,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:48:39,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2947 transitions. [2022-12-13 12:48:39,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 147.35) internal successors, (2947), 20 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:39,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 482.0) internal successors, (10122), 21 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:39,720 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 482.0) internal successors, (10122), 21 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:48:39,720 INFO L175 Difference]: Start difference. First operand has 196 places, 530 transitions, 7663 flow. Second operand 20 states and 2947 transitions. [2022-12-13 12:48:39,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 749 transitions, 11917 flow