./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.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_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/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_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/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_5ee14af8-45b7-470a-8eb0-57b26aeedd59/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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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 16:26:40,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:26:40,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:26:40,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:26:40,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:26:40,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:26:40,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:26:40,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:26:40,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:26:40,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:26:40,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:26:40,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:26:40,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:26:40,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:26:40,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:26:40,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:26:40,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:26:40,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:26:40,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:26:40,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:26:40,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:26:40,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:26:40,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:26:40,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:26:40,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:26:40,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:26:40,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:26:40,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:26:40,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:26:40,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:26:40,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:26:40,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:26:40,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:26:40,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:26:40,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:26:40,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:26:40,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:26:40,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:26:40,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:26:40,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:26:40,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:26:40,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 16:26:40,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:26:40,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:26:40,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:26:40,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:26:40,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:26:40,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:26:40,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:26:40,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:26:40,932 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:26:40,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:26:40,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:26:40,932 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:26:40,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:26:40,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:26:40,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:26:40,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:26:40,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:26:40,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:26:40,933 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 16:26:40,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:26:40,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:26:40,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:26:40,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:26:40,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:26:40,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:26:40,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:26:40,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:26:40,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:26:40,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:26:40,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:26:40,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:26:40,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:26:40,935 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:26:40,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:26:40,936 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:26:40,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:26:40,936 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:26:40,936 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_5ee14af8-45b7-470a-8eb0-57b26aeedd59/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-12-13 16:26:41,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:26:41,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:26:41,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:26:41,116 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:26:41,117 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:26:41,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-12-13 16:26:43,730 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:26:43,887 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:26:43,888 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-12-13 16:26:43,894 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/data/ba7abbdfb/5e1ff2e7da744bdcbc82ebc632c4dc48/FLAG59fc128a4 [2022-12-13 16:26:43,906 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/data/ba7abbdfb/5e1ff2e7da744bdcbc82ebc632c4dc48 [2022-12-13 16:26:43,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:26:43,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:26:43,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:26:43,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:26:43,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:26:43,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:26:43" (1/1) ... [2022-12-13 16:26:43,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8009113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:43, skipping insertion in model container [2022-12-13 16:26:43,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:26:43" (1/1) ... [2022-12-13 16:26:43,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:26:43,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:26:44,084 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,085 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,099 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,105 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_5ee14af8-45b7-470a-8eb0-57b26aeedd59/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-12-13 16:26:44,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:26:44,120 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:26:44,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,137 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,139 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,139 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:26:44,142 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:26:44,145 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_5ee14af8-45b7-470a-8eb0-57b26aeedd59/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-12-13 16:26:44,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:26:44,159 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:26:44,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44 WrapperNode [2022-12-13 16:26:44,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:26:44,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:26:44,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:26:44,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:26:44,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,196 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 161 [2022-12-13 16:26:44,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:26:44,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:26:44,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:26:44,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:26:44,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:26:44,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:26:44,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:26:44,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:26:44,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (1/1) ... [2022-12-13 16:26:44,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:26:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:44,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:26:44,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:26:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:26:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:26:44,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:26:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:26:44,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:26:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:26:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:26:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:26:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:26:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:26:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:26:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:26:44,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:26:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:26:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:26:44,285 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 16:26:44,368 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:26:44,370 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:26:44,605 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:26:44,658 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:26:44,658 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 16:26:44,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:26:44 BoogieIcfgContainer [2022-12-13 16:26:44,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:26:44,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:26:44,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:26:44,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:26:44,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:26:43" (1/3) ... [2022-12-13 16:26:44,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46860617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:26:44, skipping insertion in model container [2022-12-13 16:26:44,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:44" (2/3) ... [2022-12-13 16:26:44,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46860617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:26:44, skipping insertion in model container [2022-12-13 16:26:44,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:26:44" (3/3) ... [2022-12-13 16:26:44,667 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-12-13 16:26:44,674 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:26:44,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:26:44,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 16:26:44,682 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:26:44,748 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:26:44,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 157 transitions, 330 flow [2022-12-13 16:26:44,856 INFO L130 PetriNetUnfolder]: 11/155 cut-off events. [2022-12-13 16:26:44,856 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:26:44,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 11/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 182 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-12-13 16:26:44,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 157 transitions, 330 flow [2022-12-13 16:26:44,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 136 transitions, 281 flow [2022-12-13 16:26:44,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:26:44,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 136 transitions, 281 flow [2022-12-13 16:26:44,886 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 136 transitions, 281 flow [2022-12-13 16:26:44,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 136 transitions, 281 flow [2022-12-13 16:26:44,921 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2022-12-13 16:26:44,921 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:26:44,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 136 events. 10/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 176 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-12-13 16:26:44,924 INFO L119 LiptonReduction]: Number of co-enabled transitions 1980 [2022-12-13 16:26:49,567 INFO L134 LiptonReduction]: Checked pairs total: 2258 [2022-12-13 16:26:49,567 INFO L136 LiptonReduction]: Total number of compositions: 155 [2022-12-13 16:26:49,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:26:49,582 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;@78ed971a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:26:49,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 16:26:49,584 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 16:26:49,584 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:26:49,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:49,585 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:26:49,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash 21821, now seen corresponding path program 1 times [2022-12-13 16:26:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071275730] [2022-12-13 16:26:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:49,765 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 16:26:49,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071275730] [2022-12-13 16:26:49,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071275730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:49,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:49,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:26:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600312315] [2022-12-13 16:26:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:49,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:26:49,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:49,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:26:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:26:49,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 312 [2022-12-13 16:26:49,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 16:26:49,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:49,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 312 [2022-12-13 16:26:49,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:49,937 INFO L130 PetriNetUnfolder]: 383/577 cut-off events. [2022-12-13 16:26:49,937 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 16:26:49,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 577 events. 383/577 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 2522 event pairs, 178 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 523. Up to 284 conditions per place. [2022-12-13 16:26:49,940 INFO L137 encePairwiseOnDemand]: 305/312 looper letters, 37 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-12-13 16:26:49,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2022-12-13 16:26:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:26:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:26:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2022-12-13 16:26:49,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47649572649572647 [2022-12-13 16:26:49,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2022-12-13 16:26:49,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2022-12-13 16:26:49,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:49,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2022-12-13 16:26:49,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 16:26:49,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 16:26:49,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 16:26:49,965 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 446 transitions. [2022-12-13 16:26:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2022-12-13 16:26:49,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:26:49,970 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 64 flow [2022-12-13 16:26:49,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2022-12-13 16:26:49,974 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-12-13 16:26:49,974 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 64 flow [2022-12-13 16:26:49,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 16:26:49,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:49,975 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:26:49,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:26:49,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash 677378, now seen corresponding path program 1 times [2022-12-13 16:26:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:49,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657591750] [2022-12-13 16:26:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:49,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:50,046 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 16:26:50,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:50,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657591750] [2022-12-13 16:26:50,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657591750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855001712] [2022-12-13 16:26:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:50,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:50,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:50,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:50,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:26:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:50,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:26:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:50,133 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 16:26:50,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:26:50,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855001712] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:50,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:26:50,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-12-13 16:26:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419008524] [2022-12-13 16:26:50,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:50,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:26:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:26:50,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:26:50,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 312 [2022-12-13 16:26:50,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 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 16:26:50,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:50,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 312 [2022-12-13 16:26:50,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:50,296 INFO L130 PetriNetUnfolder]: 383/576 cut-off events. [2022-12-13 16:26:50,296 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:26:50,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 576 events. 383/576 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 2508 event pairs, 178 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 586. Up to 282 conditions per place. [2022-12-13 16:26:50,300 INFO L137 encePairwiseOnDemand]: 309/312 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-12-13 16:26:50,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 174 flow [2022-12-13 16:26:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:26:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:26:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 571 transitions. [2022-12-13 16:26:50,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45753205128205127 [2022-12-13 16:26:50,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 571 transitions. [2022-12-13 16:26:50,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 571 transitions. [2022-12-13 16:26:50,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:50,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 571 transitions. [2022-12-13 16:26:50,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 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 16:26:50,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 16:26:50,317 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 16:26:50,317 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 64 flow. Second operand 4 states and 571 transitions. [2022-12-13 16:26:50,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 174 flow [2022-12-13 16:26:50,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:26:50,318 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 62 flow [2022-12-13 16:26:50,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2022-12-13 16:26:50,319 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -2 predicate places. [2022-12-13 16:26:50,319 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 62 flow [2022-12-13 16:26:50,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 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 16:26:50,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:50,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:26:50,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:26:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:50,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 677387, now seen corresponding path program 1 times [2022-12-13 16:26:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:50,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618389466] [2022-12-13 16:26:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:50,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:50,698 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 16:26:50,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:50,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618389466] [2022-12-13 16:26:50,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618389466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:50,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766756923] [2022-12-13 16:26:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:50,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:50,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:50,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:50,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:26:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:50,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:26:50,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:50,762 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 16:26:50,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:50,776 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 16:26:50,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766756923] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:50,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:50,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 16:26:50,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141113213] [2022-12-13 16:26:50,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:50,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:26:50,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:50,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:26:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:26:50,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 312 [2022-12-13 16:26:50,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 134.14285714285714) internal successors, (939), 7 states have internal predecessors, (939), 0 states have call successors, (0), 0 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 16:26:50,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:50,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 312 [2022-12-13 16:26:50,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:51,090 INFO L130 PetriNetUnfolder]: 956/1437 cut-off events. [2022-12-13 16:26:51,090 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 16:26:51,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 1437 events. 956/1437 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 7122 event pairs, 445 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 2335. Up to 283 conditions per place. [2022-12-13 16:26:51,096 INFO L137 encePairwiseOnDemand]: 309/312 looper letters, 87 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2022-12-13 16:26:51,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 94 transitions, 410 flow [2022-12-13 16:26:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:26:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:26:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 893 transitions. [2022-12-13 16:26:51,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47702991452991456 [2022-12-13 16:26:51,100 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 893 transitions. [2022-12-13 16:26:51,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 893 transitions. [2022-12-13 16:26:51,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:51,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 893 transitions. [2022-12-13 16:26:51,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.83333333333334) internal successors, (893), 6 states have internal predecessors, (893), 0 states have call successors, (0), 0 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 16:26:51,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 16:26:51,106 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 312.0) internal successors, (2184), 7 states have internal predecessors, (2184), 0 states have call successors, (0), 0 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 16:26:51,106 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 62 flow. Second operand 6 states and 893 transitions. [2022-12-13 16:26:51,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 94 transitions, 410 flow [2022-12-13 16:26:51,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 94 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:26:51,108 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 95 flow [2022-12-13 16:26:51,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-12-13 16:26:51,108 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2022-12-13 16:26:51,108 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 95 flow [2022-12-13 16:26:51,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.14285714285714) internal successors, (939), 7 states have internal predecessors, (939), 0 states have call successors, (0), 0 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 16:26:51,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:51,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:26:51,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:26:51,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:51,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 650945810, now seen corresponding path program 1 times [2022-12-13 16:26:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:51,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953502227] [2022-12-13 16:26:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:51,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:51,521 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 16:26:51,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:51,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953502227] [2022-12-13 16:26:51,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953502227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:51,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:51,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:26:51,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495322434] [2022-12-13 16:26:51,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:26:51,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:26:51,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:26:51,542 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 312 [2022-12-13 16:26:51,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 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 16:26:51,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:51,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 312 [2022-12-13 16:26:51,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:51,745 INFO L130 PetriNetUnfolder]: 786/1432 cut-off events. [2022-12-13 16:26:51,745 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 16:26:51,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2921 conditions, 1432 events. 786/1432 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8520 event pairs, 285 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 2329. Up to 791 conditions per place. [2022-12-13 16:26:51,750 INFO L137 encePairwiseOnDemand]: 305/312 looper letters, 42 selfloop transitions, 4 changer transitions 3/50 dead transitions. [2022-12-13 16:26:51,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 245 flow [2022-12-13 16:26:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:26:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:26:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 693 transitions. [2022-12-13 16:26:51,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4442307692307692 [2022-12-13 16:26:51,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 693 transitions. [2022-12-13 16:26:51,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 693 transitions. [2022-12-13 16:26:51,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:51,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 693 transitions. [2022-12-13 16:26:51,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 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 16:26:51,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 16:26:51,755 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 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 16:26:51,755 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 95 flow. Second operand 5 states and 693 transitions. [2022-12-13 16:26:51,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 245 flow [2022-12-13 16:26:51,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 237 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 16:26:51,756 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 129 flow [2022-12-13 16:26:51,757 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2022-12-13 16:26:51,757 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2022-12-13 16:26:51,757 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 129 flow [2022-12-13 16:26:51,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 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 16:26:51,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:51,758 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 16:26:51,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:26:51,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1294147962, now seen corresponding path program 2 times [2022-12-13 16:26:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:51,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465089725] [2022-12-13 16:26:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:51,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:51,837 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 16:26:51,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:51,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465089725] [2022-12-13 16:26:51,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465089725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:51,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090442077] [2022-12-13 16:26:51,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:51,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:51,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:51,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:51,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:26:51,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:26:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:26:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:51,907 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 16:26:51,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:26:51,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090442077] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:51,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:26:51,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 16:26:51,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603989777] [2022-12-13 16:26:51,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:51,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:26:51,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:26:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:26:51,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 312 [2022-12-13 16:26:51,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 16:26:51,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:51,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 312 [2022-12-13 16:26:51,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:52,082 INFO L130 PetriNetUnfolder]: 851/1456 cut-off events. [2022-12-13 16:26:52,082 INFO L131 PetriNetUnfolder]: For 683/753 co-relation queries the response was YES. [2022-12-13 16:26:52,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1456 events. 851/1456 cut-off events. For 683/753 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 8927 event pairs, 525 based on Foata normal form. 56/972 useless extension candidates. Maximal degree in co-relation 3080. Up to 1436 conditions per place. [2022-12-13 16:26:52,090 INFO L137 encePairwiseOnDemand]: 310/312 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 16:26:52,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 169 flow [2022-12-13 16:26:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:26:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:26:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2022-12-13 16:26:52,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45085470085470086 [2022-12-13 16:26:52,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2022-12-13 16:26:52,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2022-12-13 16:26:52,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:52,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2022-12-13 16:26:52,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 16:26:52,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 16:26:52,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 16:26:52,097 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 129 flow. Second operand 3 states and 422 transitions. [2022-12-13 16:26:52,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 169 flow [2022-12-13 16:26:52,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 157 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 16:26:52,100 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 109 flow [2022-12-13 16:26:52,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2022-12-13 16:26:52,100 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2022-12-13 16:26:52,101 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 109 flow [2022-12-13 16:26:52,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 16:26:52,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:52,101 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:52,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:26:52,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:52,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1501428651, now seen corresponding path program 1 times [2022-12-13 16:26:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:52,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126341954] [2022-12-13 16:26:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:52,388 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 16:26:52,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126341954] [2022-12-13 16:26:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126341954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:52,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:52,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:26:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12715139] [2022-12-13 16:26:52,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:52,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:26:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:26:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:26:52,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 312 [2022-12-13 16:26:52,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 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 16:26:52,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:52,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 312 [2022-12-13 16:26:52,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:52,617 INFO L130 PetriNetUnfolder]: 690/1195 cut-off events. [2022-12-13 16:26:52,617 INFO L131 PetriNetUnfolder]: For 577/640 co-relation queries the response was YES. [2022-12-13 16:26:52,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 1195 events. 690/1195 cut-off events. For 577/640 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 7105 event pairs, 429 based on Foata normal form. 59/822 useless extension candidates. Maximal degree in co-relation 3134. Up to 1150 conditions per place. [2022-12-13 16:26:52,624 INFO L137 encePairwiseOnDemand]: 306/312 looper letters, 23 selfloop transitions, 2 changer transitions 9/37 dead transitions. [2022-12-13 16:26:52,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 199 flow [2022-12-13 16:26:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:26:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:26:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2022-12-13 16:26:52,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2022-12-13 16:26:52,626 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2022-12-13 16:26:52,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2022-12-13 16:26:52,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:52,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2022-12-13 16:26:52,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 16:26:52,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 16:26:52,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 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 16:26:52,630 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 109 flow. Second operand 4 states and 552 transitions. [2022-12-13 16:26:52,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 199 flow [2022-12-13 16:26:52,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:26:52,633 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 124 flow [2022-12-13 16:26:52,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2022-12-13 16:26:52,633 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2022-12-13 16:26:52,634 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 124 flow [2022-12-13 16:26:52,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 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 16:26:52,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:52,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:52,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:26:52,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:52,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1826797229, now seen corresponding path program 1 times [2022-12-13 16:26:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053452213] [2022-12-13 16:26:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:52,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:52,717 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 16:26:52,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053452213] [2022-12-13 16:26:52,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053452213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686621178] [2022-12-13 16:26:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:52,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:52,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:52,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:52,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:26:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:26:52,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:52,789 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 16:26:52,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:26:52,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686621178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:52,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:26:52,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 16:26:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114783450] [2022-12-13 16:26:52,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:52,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:26:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:26:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:26:52,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 312 [2022-12-13 16:26:52,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 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 16:26:52,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:52,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 312 [2022-12-13 16:26:52,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:52,869 INFO L130 PetriNetUnfolder]: 309/554 cut-off events. [2022-12-13 16:26:52,869 INFO L131 PetriNetUnfolder]: For 564/596 co-relation queries the response was YES. [2022-12-13 16:26:52,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 554 events. 309/554 cut-off events. For 564/596 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2789 event pairs, 164 based on Foata normal form. 128/606 useless extension candidates. Maximal degree in co-relation 1558. Up to 538 conditions per place. [2022-12-13 16:26:52,871 INFO L137 encePairwiseOnDemand]: 308/312 looper letters, 17 selfloop transitions, 1 changer transitions 5/25 dead transitions. [2022-12-13 16:26:52,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 25 transitions, 154 flow [2022-12-13 16:26:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:26:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:26:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2022-12-13 16:26:52,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4497863247863248 [2022-12-13 16:26:52,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2022-12-13 16:26:52,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2022-12-13 16:26:52,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:52,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2022-12-13 16:26:52,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 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 16:26:52,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 16:26:52,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 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 16:26:52,874 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 124 flow. Second operand 3 states and 421 transitions. [2022-12-13 16:26:52,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 25 transitions, 154 flow [2022-12-13 16:26:52,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 144 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 16:26:52,876 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 83 flow [2022-12-13 16:26:52,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2022-12-13 16:26:52,876 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-12-13 16:26:52,876 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 83 flow [2022-12-13 16:26:52,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 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 16:26:52,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:52,877 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:52,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:26:53,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:53,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1089463003, now seen corresponding path program 1 times [2022-12-13 16:26:53,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:53,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856407540] [2022-12-13 16:26:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:53,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:53,829 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 16:26:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856407540] [2022-12-13 16:26:53,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856407540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532895512] [2022-12-13 16:26:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:53,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:53,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:53,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:26:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 16:26:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:53,979 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 16:26:54,024 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 6 treesize of output 5 [2022-12-13 16:26:54,066 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 6 treesize of output 5 [2022-12-13 16:26:54,208 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 16:26:54,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:54,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:26:54,757 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 62 treesize of output 50 [2022-12-13 16:26:54,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:26:54,768 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 148 treesize of output 144 [2022-12-13 16:26:54,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:26:54,777 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 132 treesize of output 120 [2022-12-13 16:26:54,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:26:54,787 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 83 treesize of output 83 [2022-12-13 16:26:55,073 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 16:26:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532895512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:55,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2022-12-13 16:26:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708522216] [2022-12-13 16:26:55,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:55,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:26:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:26:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=348, Unknown=1, NotChecked=0, Total=462 [2022-12-13 16:26:56,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 312 [2022-12-13 16:26:56,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 83 flow. Second operand has 22 states, 22 states have (on average 83.36363636363636) internal successors, (1834), 22 states have internal predecessors, (1834), 0 states have call successors, (0), 0 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 16:26:56,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:56,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 312 [2022-12-13 16:26:56,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:57,857 INFO L130 PetriNetUnfolder]: 365/634 cut-off events. [2022-12-13 16:26:57,857 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2022-12-13 16:26:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1846 conditions, 634 events. 365/634 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2582 event pairs, 36 based on Foata normal form. 6/552 useless extension candidates. Maximal degree in co-relation 1832. Up to 290 conditions per place. [2022-12-13 16:26:57,859 INFO L137 encePairwiseOnDemand]: 301/312 looper letters, 69 selfloop transitions, 50 changer transitions 2/121 dead transitions. [2022-12-13 16:26:57,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 121 transitions, 688 flow [2022-12-13 16:26:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:26:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:26:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2259 transitions. [2022-12-13 16:26:57,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.27847633136094674 [2022-12-13 16:26:57,864 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2259 transitions. [2022-12-13 16:26:57,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2259 transitions. [2022-12-13 16:26:57,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:57,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2259 transitions. [2022-12-13 16:26:57,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.88461538461539) internal successors, (2259), 26 states have internal predecessors, (2259), 0 states have call successors, (0), 0 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 16:26:57,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 312.0) internal successors, (8424), 27 states have internal predecessors, (8424), 0 states have call successors, (0), 0 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 16:26:57,876 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 312.0) internal successors, (8424), 27 states have internal predecessors, (8424), 0 states have call successors, (0), 0 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 16:26:57,876 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 83 flow. Second operand 26 states and 2259 transitions. [2022-12-13 16:26:57,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 121 transitions, 688 flow [2022-12-13 16:26:57,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 121 transitions, 639 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-12-13 16:26:57,878 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 459 flow [2022-12-13 16:26:57,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=459, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2022-12-13 16:26:57,879 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2022-12-13 16:26:57,879 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 459 flow [2022-12-13 16:26:57,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.36363636363636) internal successors, (1834), 22 states have internal predecessors, (1834), 0 states have call successors, (0), 0 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 16:26:57,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:57,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:57,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:26:58,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:58,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:58,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1089463001, now seen corresponding path program 1 times [2022-12-13 16:26:58,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:58,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021264386] [2022-12-13 16:26:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:58,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:58,405 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 16:26:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021264386] [2022-12-13 16:26:58,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021264386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:58,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884860102] [2022-12-13 16:26:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:58,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:58,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:58,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:26:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:58,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:26:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:58,552 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 16:26:58,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:26:58,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884860102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:58,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:26:58,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-12-13 16:26:58,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123069733] [2022-12-13 16:26:58,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:58,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:26:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:26:58,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:26:58,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 312 [2022-12-13 16:26:58,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 16:26:58,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:58,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 312 [2022-12-13 16:26:58,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:58,790 INFO L130 PetriNetUnfolder]: 389/674 cut-off events. [2022-12-13 16:26:58,790 INFO L131 PetriNetUnfolder]: For 1570/1570 co-relation queries the response was YES. [2022-12-13 16:26:58,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2581 conditions, 674 events. 389/674 cut-off events. For 1570/1570 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2795 event pairs, 52 based on Foata normal form. 12/678 useless extension candidates. Maximal degree in co-relation 2558. Up to 445 conditions per place. [2022-12-13 16:26:58,794 INFO L137 encePairwiseOnDemand]: 305/312 looper letters, 61 selfloop transitions, 27 changer transitions 1/89 dead transitions. [2022-12-13 16:26:58,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 753 flow [2022-12-13 16:26:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:26:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:26:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 872 transitions. [2022-12-13 16:26:58,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3992673992673993 [2022-12-13 16:26:58,796 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 872 transitions. [2022-12-13 16:26:58,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 872 transitions. [2022-12-13 16:26:58,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:58,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 872 transitions. [2022-12-13 16:26:58,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 16:26:58,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 312.0) internal successors, (2496), 8 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 16:26:58,799 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 312.0) internal successors, (2496), 8 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 16:26:58,799 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 459 flow. Second operand 7 states and 872 transitions. [2022-12-13 16:26:58,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 753 flow [2022-12-13 16:26:58,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 689 flow, removed 28 selfloop flow, removed 4 redundant places. [2022-12-13 16:26:58,804 INFO L231 Difference]: Finished difference. Result has 65 places, 77 transitions, 576 flow [2022-12-13 16:26:58,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=576, PETRI_PLACES=65, PETRI_TRANSITIONS=77} [2022-12-13 16:26:58,805 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2022-12-13 16:26:58,805 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 77 transitions, 576 flow [2022-12-13 16:26:58,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 16:26:58,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:58,805 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:58,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:26:59,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 16:26:59,007 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:26:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1968148360, now seen corresponding path program 2 times [2022-12-13 16:26:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875019138] [2022-12-13 16:26:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:26:59,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:59,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875019138] [2022-12-13 16:26:59,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875019138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:59,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910994934] [2022-12-13 16:26:59,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:26:59,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:59,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:59,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:59,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:26:59,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 16:26:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:27:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:00,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:27:00,454 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-13 16:27:00,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 253 treesize of output 221 [2022-12-13 16:27:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:01,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910994934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:27:01,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:27:01,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2022-12-13 16:27:01,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662627100] [2022-12-13 16:27:01,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:27:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:27:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:27:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:27:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:27:02,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 312 [2022-12-13 16:27:02,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 77 transitions, 576 flow. Second operand has 25 states, 25 states have (on average 108.44) internal successors, (2711), 25 states have internal predecessors, (2711), 0 states have call successors, (0), 0 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 16:27:02,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:27:02,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 312 [2022-12-13 16:27:02,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:27:04,618 INFO L130 PetriNetUnfolder]: 613/1026 cut-off events. [2022-12-13 16:27:04,618 INFO L131 PetriNetUnfolder]: For 4507/4507 co-relation queries the response was YES. [2022-12-13 16:27:04,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4469 conditions, 1026 events. 613/1026 cut-off events. For 4507/4507 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4655 event pairs, 32 based on Foata normal form. 68/1086 useless extension candidates. Maximal degree in co-relation 4443. Up to 489 conditions per place. [2022-12-13 16:27:04,629 INFO L137 encePairwiseOnDemand]: 300/312 looper letters, 93 selfloop transitions, 84 changer transitions 3/180 dead transitions. [2022-12-13 16:27:04,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 180 transitions, 1624 flow [2022-12-13 16:27:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:27:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 16:27:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3018 transitions. [2022-12-13 16:27:04,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35826210826210825 [2022-12-13 16:27:04,633 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3018 transitions. [2022-12-13 16:27:04,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3018 transitions. [2022-12-13 16:27:04,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:27:04,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3018 transitions. [2022-12-13 16:27:04,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.77777777777777) internal successors, (3018), 27 states have internal predecessors, (3018), 0 states have call successors, (0), 0 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 16:27:04,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 312.0) internal successors, (8736), 28 states have internal predecessors, (8736), 0 states have call successors, (0), 0 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 16:27:04,644 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 312.0) internal successors, (8736), 28 states have internal predecessors, (8736), 0 states have call successors, (0), 0 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 16:27:04,644 INFO L175 Difference]: Start difference. First operand has 65 places, 77 transitions, 576 flow. Second operand 27 states and 3018 transitions. [2022-12-13 16:27:04,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 180 transitions, 1624 flow [2022-12-13 16:27:04,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 180 transitions, 1551 flow, removed 34 selfloop flow, removed 1 redundant places. [2022-12-13 16:27:04,659 INFO L231 Difference]: Finished difference. Result has 100 places, 129 transitions, 1326 flow [2022-12-13 16:27:04,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1326, PETRI_PLACES=100, PETRI_TRANSITIONS=129} [2022-12-13 16:27:04,660 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2022-12-13 16:27:04,660 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 129 transitions, 1326 flow [2022-12-13 16:27:04,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 108.44) internal successors, (2711), 25 states have internal predecessors, (2711), 0 states have call successors, (0), 0 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 16:27:04,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:27:04,661 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:27:04,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:27:04,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:27:04,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:27:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:27:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 621093962, now seen corresponding path program 2 times [2022-12-13 16:27:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:27:04,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737841177] [2022-12-13 16:27:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:27:04,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:27:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:27:06,016 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 16:27:06,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:27:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737841177] [2022-12-13 16:27:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737841177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:27:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963091174] [2022-12-13 16:27:06,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:27:06,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:27:06,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:27:06,018 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:27:06,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:27:06,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:27:06,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:27:06,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:27:06,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:27:06,189 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 16:27:06,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:27:06,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963091174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:27:06,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:27:06,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2022-12-13 16:27:06,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623519218] [2022-12-13 16:27:06,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:27:06,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:27:06,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:27:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:27:06,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:27:06,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 312 [2022-12-13 16:27:06,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 129 transitions, 1326 flow. Second operand has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 16:27:06,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:27:06,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 312 [2022-12-13 16:27:06,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:27:06,450 INFO L130 PetriNetUnfolder]: 599/1008 cut-off events. [2022-12-13 16:27:06,450 INFO L131 PetriNetUnfolder]: For 5727/5727 co-relation queries the response was YES. [2022-12-13 16:27:06,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5236 conditions, 1008 events. 599/1008 cut-off events. For 5727/5727 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4574 event pairs, 44 based on Foata normal form. 12/1012 useless extension candidates. Maximal degree in co-relation 5199. Up to 761 conditions per place. [2022-12-13 16:27:06,458 INFO L137 encePairwiseOnDemand]: 306/312 looper letters, 102 selfloop transitions, 33 changer transitions 1/136 dead transitions. [2022-12-13 16:27:06,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1598 flow [2022-12-13 16:27:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:27:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:27:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 868 transitions. [2022-12-13 16:27:06,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2022-12-13 16:27:06,460 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 868 transitions. [2022-12-13 16:27:06,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 868 transitions. [2022-12-13 16:27:06,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:27:06,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 868 transitions. [2022-12-13 16:27:06,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 16:27:06,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 312.0) internal successors, (2496), 8 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 16:27:06,466 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 312.0) internal successors, (2496), 8 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 16:27:06,466 INFO L175 Difference]: Start difference. First operand has 100 places, 129 transitions, 1326 flow. Second operand 7 states and 868 transitions. [2022-12-13 16:27:06,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1598 flow [2022-12-13 16:27:06,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 136 transitions, 1337 flow, removed 118 selfloop flow, removed 10 redundant places. [2022-12-13 16:27:06,501 INFO L231 Difference]: Finished difference. Result has 96 places, 125 transitions, 1081 flow [2022-12-13 16:27:06,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1081, PETRI_PLACES=96, PETRI_TRANSITIONS=125} [2022-12-13 16:27:06,501 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2022-12-13 16:27:06,501 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 125 transitions, 1081 flow [2022-12-13 16:27:06,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 16:27:06,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:27:06,502 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:27:06,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 16:27:06,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:27:06,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:27:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:27:06,703 INFO L85 PathProgramCache]: Analyzing trace with hash -888854204, now seen corresponding path program 1 times [2022-12-13 16:27:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:27:06,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123270641] [2022-12-13 16:27:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:27:06,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:27:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:27:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:27:06,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:27:06,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123270641] [2022-12-13 16:27:06,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123270641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:27:06,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066256272] [2022-12-13 16:27:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:27:06,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:27:06,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:27:06,829 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:27:06,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:27:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:27:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:27:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:27:06,951 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 154 treesize of output 122 [2022-12-13 16:27:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:27:06,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:27:07,071 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 170 treesize of output 138 [2022-12-13 16:27:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:27:07,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066256272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:27:07,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:27:07,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-12-13 16:27:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897169434] [2022-12-13 16:27:07,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:27:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:27:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:27:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:27:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:27:07,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 312 [2022-12-13 16:27:07,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 125 transitions, 1081 flow. Second operand has 10 states, 10 states have (on average 126.8) internal successors, (1268), 10 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 16:27:07,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:27:07,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 312 [2022-12-13 16:27:07,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:27:07,330 INFO L130 PetriNetUnfolder]: 415/752 cut-off events. [2022-12-13 16:27:07,330 INFO L131 PetriNetUnfolder]: For 4822/4822 co-relation queries the response was YES. [2022-12-13 16:27:07,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3419 conditions, 752 events. 415/752 cut-off events. For 4822/4822 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3412 event pairs, 66 based on Foata normal form. 120/872 useless extension candidates. Maximal degree in co-relation 3383. Up to 515 conditions per place. [2022-12-13 16:27:07,333 INFO L137 encePairwiseOnDemand]: 305/312 looper letters, 72 selfloop transitions, 15 changer transitions 28/115 dead transitions. [2022-12-13 16:27:07,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 115 transitions, 1214 flow [2022-12-13 16:27:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:27:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 16:27:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1035 transitions. [2022-12-13 16:27:07,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41466346153846156 [2022-12-13 16:27:07,338 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1035 transitions. [2022-12-13 16:27:07,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1035 transitions. [2022-12-13 16:27:07,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:27:07,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1035 transitions. [2022-12-13 16:27:07,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.375) internal successors, (1035), 8 states have internal predecessors, (1035), 0 states have call successors, (0), 0 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 16:27:07,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 312.0) internal successors, (2808), 9 states have internal predecessors, (2808), 0 states have call successors, (0), 0 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 16:27:07,342 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 312.0) internal successors, (2808), 9 states have internal predecessors, (2808), 0 states have call successors, (0), 0 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 16:27:07,342 INFO L175 Difference]: Start difference. First operand has 96 places, 125 transitions, 1081 flow. Second operand 8 states and 1035 transitions. [2022-12-13 16:27:07,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 115 transitions, 1214 flow [2022-12-13 16:27:07,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 115 transitions, 1099 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-12-13 16:27:07,351 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 735 flow [2022-12-13 16:27:07,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=735, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2022-12-13 16:27:07,352 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2022-12-13 16:27:07,352 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 735 flow [2022-12-13 16:27:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 126.8) internal successors, (1268), 10 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 16:27:07,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:27:07,353 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:27:07,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:27:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:27:07,554 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:27:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:27:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1784678844, now seen corresponding path program 2 times [2022-12-13 16:27:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:27:07,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176723057] [2022-12-13 16:27:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:27:07,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:27:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:27:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:08,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:27:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176723057] [2022-12-13 16:27:08,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176723057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:27:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974973717] [2022-12-13 16:27:08,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:27:08,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:27:08,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:27:08,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:27:08,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:27:08,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:27:08,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:27:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 16:27:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:27:08,535 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 16:27:08,574 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 6 treesize of output 5 [2022-12-13 16:27:08,610 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 6 treesize of output 5 [2022-12-13 16:27:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:27:10,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:27:10,231 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 151 treesize of output 103 [2022-12-13 16:27:10,256 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2022-12-13 16:27:10,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 329 treesize of output 309 [2022-12-13 16:27:10,277 INFO L321 Elim1Store]: treesize reduction 53, result has 18.5 percent of original size [2022-12-13 16:27:10,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 238 [2022-12-13 16:27:10,300 INFO L321 Elim1Store]: treesize reduction 53, result has 18.5 percent of original size [2022-12-13 16:27:10,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 159 [2022-12-13 16:27:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:10,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974973717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:27:10,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:27:10,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-13 16:27:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883769320] [2022-12-13 16:27:10,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:27:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:27:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:27:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:27:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=759, Unknown=3, NotChecked=0, Total=992 [2022-12-13 16:27:12,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:27:12,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 735 flow. Second operand has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 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 16:27:12,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:27:12,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:27:12,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:27:16,470 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 16:27:34,174 WARN L233 SmtUtils]: Spent 11.81s on a formula simplification. DAG size of input: 116 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:27:37,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:27:37,470 INFO L130 PetriNetUnfolder]: 563/971 cut-off events. [2022-12-13 16:27:37,470 INFO L131 PetriNetUnfolder]: For 8771/8771 co-relation queries the response was YES. [2022-12-13 16:27:37,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5097 conditions, 971 events. 563/971 cut-off events. For 8771/8771 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4492 event pairs, 62 based on Foata normal form. 32/1003 useless extension candidates. Maximal degree in co-relation 5063. Up to 496 conditions per place. [2022-12-13 16:27:37,475 INFO L137 encePairwiseOnDemand]: 301/312 looper letters, 108 selfloop transitions, 72 changer transitions 7/187 dead transitions. [2022-12-13 16:27:37,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 187 transitions, 1961 flow [2022-12-13 16:27:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 16:27:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 16:27:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2605 transitions. [2022-12-13 16:27:37,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2693341604631927 [2022-12-13 16:27:37,479 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2605 transitions. [2022-12-13 16:27:37,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2605 transitions. [2022-12-13 16:27:37,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:27:37,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2605 transitions. [2022-12-13 16:27:37,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 84.03225806451613) internal successors, (2605), 31 states have internal predecessors, (2605), 0 states have call successors, (0), 0 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 16:27:37,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 312.0) internal successors, (9984), 32 states have internal predecessors, (9984), 0 states have call successors, (0), 0 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 16:27:37,488 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 312.0) internal successors, (9984), 32 states have internal predecessors, (9984), 0 states have call successors, (0), 0 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 16:27:37,488 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 735 flow. Second operand 31 states and 2605 transitions. [2022-12-13 16:27:37,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 187 transitions, 1961 flow [2022-12-13 16:27:37,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 187 transitions, 1703 flow, removed 107 selfloop flow, removed 11 redundant places. [2022-12-13 16:27:37,500 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1426 flow [2022-12-13 16:27:37,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1426, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2022-12-13 16:27:37,501 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2022-12-13 16:27:37,501 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1426 flow [2022-12-13 16:27:37,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 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 16:27:37,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:27:37,501 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:27:37,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 16:27:37,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:27:37,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:27:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:27:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash 751484037, now seen corresponding path program 3 times [2022-12-13 16:27:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:27:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592257843] [2022-12-13 16:27:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:27:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:27:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:27:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:38,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:27:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592257843] [2022-12-13 16:27:38,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592257843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:27:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890619700] [2022-12-13 16:27:38,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:27:38,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:27:38,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:27:38,298 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:27:38,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:27:38,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:27:38,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:27:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:27:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:27:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 16:27:38,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:27:38,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:27:38,628 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 88 treesize of output 76 [2022-12-13 16:27:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 16:27:38,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890619700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:27:38,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:27:38,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2022-12-13 16:27:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882951418] [2022-12-13 16:27:38,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:27:38,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:27:38,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:27:38,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:27:38,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:27:39,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 312 [2022-12-13 16:27:39,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1426 flow. Second operand has 19 states, 19 states have (on average 110.89473684210526) internal successors, (2107), 19 states have internal predecessors, (2107), 0 states have call successors, (0), 0 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 16:27:39,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:27:39,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 312 [2022-12-13 16:27:39,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:27:40,629 INFO L130 PetriNetUnfolder]: 655/1127 cut-off events. [2022-12-13 16:27:40,629 INFO L131 PetriNetUnfolder]: For 7282/7282 co-relation queries the response was YES. [2022-12-13 16:27:40,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5801 conditions, 1127 events. 655/1127 cut-off events. For 7282/7282 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5460 event pairs, 42 based on Foata normal form. 12/1139 useless extension candidates. Maximal degree in co-relation 5766. Up to 591 conditions per place. [2022-12-13 16:27:40,635 INFO L137 encePairwiseOnDemand]: 303/312 looper letters, 121 selfloop transitions, 83 changer transitions 5/209 dead transitions. [2022-12-13 16:27:40,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 2339 flow [2022-12-13 16:27:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:27:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 16:27:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2489 transitions. [2022-12-13 16:27:40,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36261655011655014 [2022-12-13 16:27:40,637 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2489 transitions. [2022-12-13 16:27:40,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2489 transitions. [2022-12-13 16:27:40,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:27:40,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2489 transitions. [2022-12-13 16:27:40,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 113.13636363636364) internal successors, (2489), 22 states have internal predecessors, (2489), 0 states have call successors, (0), 0 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 16:27:40,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 312.0) internal successors, (7176), 23 states have internal predecessors, (7176), 0 states have call successors, (0), 0 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 16:27:40,644 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 312.0) internal successors, (7176), 23 states have internal predecessors, (7176), 0 states have call successors, (0), 0 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 16:27:40,644 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1426 flow. Second operand 22 states and 2489 transitions. [2022-12-13 16:27:40,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 2339 flow [2022-12-13 16:27:40,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 209 transitions, 2102 flow, removed 108 selfloop flow, removed 9 redundant places. [2022-12-13 16:27:40,661 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 1768 flow [2022-12-13 16:27:40,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1768, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2022-12-13 16:27:40,662 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2022-12-13 16:27:40,662 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 1768 flow [2022-12-13 16:27:40,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 110.89473684210526) internal successors, (2107), 19 states have internal predecessors, (2107), 0 states have call successors, (0), 0 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 16:27:40,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:27:40,662 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:27:40,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:27:40,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:27:40,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:27:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:27:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1784592352, now seen corresponding path program 1 times [2022-12-13 16:27:40,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:27:40,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399370802] [2022-12-13 16:27:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:27:40,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:27:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:27:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:41,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:27:41,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399370802] [2022-12-13 16:27:41,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399370802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:27:41,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48783295] [2022-12-13 16:27:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:27:41,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:27:41,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:27:41,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:27:41,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:27:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:27:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 16:27:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:27:41,872 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 16:27:41,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:27:41,926 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 16:27:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:27:41,978 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 16:27:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:42,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:27:43,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:27:43,152 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 124 treesize of output 88 [2022-12-13 16:27:43,207 INFO L321 Elim1Store]: treesize reduction 14, result has 86.7 percent of original size [2022-12-13 16:27:43,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 283 treesize of output 331 [2022-12-13 16:27:43,241 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 16:27:43,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 222 [2022-12-13 16:27:43,273 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 16:27:43,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 167 [2022-12-13 16:27:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:27:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48783295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:27:46,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:27:46,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-12-13 16:27:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509523910] [2022-12-13 16:27:46,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:27:46,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 16:27:46,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:27:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 16:27:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=936, Unknown=2, NotChecked=0, Total=1122 [2022-12-13 16:27:49,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:27:49,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 1768 flow. Second operand has 34 states, 34 states have (on average 81.23529411764706) internal successors, (2762), 34 states have internal predecessors, (2762), 0 states have call successors, (0), 0 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 16:27:49,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:27:49,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:27:49,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:28:03,280 INFO L130 PetriNetUnfolder]: 1675/2763 cut-off events. [2022-12-13 16:28:03,281 INFO L131 PetriNetUnfolder]: For 25030/25030 co-relation queries the response was YES. [2022-12-13 16:28:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15393 conditions, 2763 events. 1675/2763 cut-off events. For 25030/25030 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14441 event pairs, 92 based on Foata normal form. 120/2883 useless extension candidates. Maximal degree in co-relation 15355. Up to 865 conditions per place. [2022-12-13 16:28:03,301 INFO L137 encePairwiseOnDemand]: 301/312 looper letters, 267 selfloop transitions, 292 changer transitions 8/567 dead transitions. [2022-12-13 16:28:03,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 567 transitions, 6826 flow [2022-12-13 16:28:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 16:28:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-12-13 16:28:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6205 transitions. [2022-12-13 16:28:03,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2724358974358974 [2022-12-13 16:28:03,307 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6205 transitions. [2022-12-13 16:28:03,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6205 transitions. [2022-12-13 16:28:03,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:28:03,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6205 transitions. [2022-12-13 16:28:03,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 85.0) internal successors, (6205), 73 states have internal predecessors, (6205), 0 states have call successors, (0), 0 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 16:28:03,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 312.0) internal successors, (23088), 74 states have internal predecessors, (23088), 0 states have call successors, (0), 0 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 16:28:03,326 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 312.0) internal successors, (23088), 74 states have internal predecessors, (23088), 0 states have call successors, (0), 0 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 16:28:03,326 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 1768 flow. Second operand 73 states and 6205 transitions. [2022-12-13 16:28:03,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 567 transitions, 6826 flow [2022-12-13 16:28:03,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 567 transitions, 6643 flow, removed 64 selfloop flow, removed 12 redundant places. [2022-12-13 16:28:03,365 INFO L231 Difference]: Finished difference. Result has 200 places, 390 transitions, 5583 flow [2022-12-13 16:28:03,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=5583, PETRI_PLACES=200, PETRI_TRANSITIONS=390} [2022-12-13 16:28:03,365 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2022-12-13 16:28:03,366 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 390 transitions, 5583 flow [2022-12-13 16:28:03,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.23529411764706) internal successors, (2762), 34 states have internal predecessors, (2762), 0 states have call successors, (0), 0 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 16:28:03,366 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:28:03,366 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:28:03,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 16:28:03,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 16:28:03,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:28:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:28:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1815371543, now seen corresponding path program 2 times [2022-12-13 16:28:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:28:03,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691281387] [2022-12-13 16:28:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:28:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:28:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:28:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:28:04,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691281387] [2022-12-13 16:28:04,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691281387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:28:04,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210465215] [2022-12-13 16:28:04,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:28:04,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:04,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:28:04,466 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:28:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:28:04,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:28:04,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:28:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 16:28:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:28:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:28:04,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:28:05,278 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 16:28:05,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 258 [2022-12-13 16:28:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:28:05,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210465215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:28:05,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:28:05,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2022-12-13 16:28:05,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982955297] [2022-12-13 16:28:05,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:28:05,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:28:05,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:28:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:28:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-12-13 16:28:07,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 312 [2022-12-13 16:28:07,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 390 transitions, 5583 flow. Second operand has 27 states, 27 states have (on average 107.5925925925926) internal successors, (2905), 27 states have internal predecessors, (2905), 0 states have call successors, (0), 0 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 16:28:07,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:28:07,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 312 [2022-12-13 16:28:07,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:28:10,392 INFO L130 PetriNetUnfolder]: 2087/3415 cut-off events. [2022-12-13 16:28:10,392 INFO L131 PetriNetUnfolder]: For 83490/83490 co-relation queries the response was YES. [2022-12-13 16:28:10,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24702 conditions, 3415 events. 2087/3415 cut-off events. For 83490/83490 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 19040 event pairs, 164 based on Foata normal form. 56/3471 useless extension candidates. Maximal degree in co-relation 24645. Up to 2027 conditions per place. [2022-12-13 16:28:10,413 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 387 selfloop transitions, 196 changer transitions 5/588 dead transitions. [2022-12-13 16:28:10,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 588 transitions, 9332 flow [2022-12-13 16:28:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 16:28:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 16:28:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4874 transitions. [2022-12-13 16:28:10,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3550407925407925 [2022-12-13 16:28:10,420 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4874 transitions. [2022-12-13 16:28:10,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4874 transitions. [2022-12-13 16:28:10,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:28:10,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4874 transitions. [2022-12-13 16:28:10,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 110.77272727272727) internal successors, (4874), 44 states have internal predecessors, (4874), 0 states have call successors, (0), 0 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 16:28:10,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 312.0) internal successors, (14040), 45 states have internal predecessors, (14040), 0 states have call successors, (0), 0 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 16:28:10,436 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 312.0) internal successors, (14040), 45 states have internal predecessors, (14040), 0 states have call successors, (0), 0 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 16:28:10,436 INFO L175 Difference]: Start difference. First operand has 200 places, 390 transitions, 5583 flow. Second operand 44 states and 4874 transitions. [2022-12-13 16:28:10,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 588 transitions, 9332 flow [2022-12-13 16:28:10,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 588 transitions, 7345 flow, removed 950 selfloop flow, removed 21 redundant places. [2022-12-13 16:28:10,634 INFO L231 Difference]: Finished difference. Result has 238 places, 480 transitions, 5991 flow [2022-12-13 16:28:10,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=3897, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5991, PETRI_PLACES=238, PETRI_TRANSITIONS=480} [2022-12-13 16:28:10,635 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2022-12-13 16:28:10,635 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 480 transitions, 5991 flow [2022-12-13 16:28:10,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.5925925925926) internal successors, (2905), 27 states have internal predecessors, (2905), 0 states have call successors, (0), 0 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 16:28:10,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:28:10,635 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:28:10,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 16:28:10,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:10,836 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:28:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:28:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1604952624, now seen corresponding path program 3 times [2022-12-13 16:28:10,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:28:10,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402959588] [2022-12-13 16:28:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:28:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:28:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:28:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:11,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:28:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402959588] [2022-12-13 16:28:11,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402959588] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:28:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616863163] [2022-12-13 16:28:11,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:28:11,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:11,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:28:11,405 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:28:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:28:11,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:28:11,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:28:11,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 16:28:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:28:11,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:28:11,579 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 6 treesize of output 5 [2022-12-13 16:28:11,619 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 6 treesize of output 5 [2022-12-13 16:28:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:11,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:28:12,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:28:12,872 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 153 treesize of output 105 [2022-12-13 16:28:12,904 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-12-13 16:28:12,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 715 treesize of output 664 [2022-12-13 16:28:12,933 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-13 16:28:12,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 629 treesize of output 525 [2022-12-13 16:28:12,960 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-13 16:28:12,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 497 treesize of output 459 [2022-12-13 16:28:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:13,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616863163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:28:13,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:28:13,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2022-12-13 16:28:13,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726711105] [2022-12-13 16:28:13,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:28:13,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 16:28:13,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:28:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 16:28:13,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=849, Unknown=1, NotChecked=0, Total=1056 [2022-12-13 16:28:15,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:28:15,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 480 transitions, 5991 flow. Second operand has 33 states, 33 states have (on average 81.27272727272727) internal successors, (2682), 33 states have internal predecessors, (2682), 0 states have call successors, (0), 0 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 16:28:15,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:28:15,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:28:15,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:28:20,370 INFO L130 PetriNetUnfolder]: 2625/4301 cut-off events. [2022-12-13 16:28:20,371 INFO L131 PetriNetUnfolder]: For 130658/130658 co-relation queries the response was YES. [2022-12-13 16:28:20,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29101 conditions, 4301 events. 2625/4301 cut-off events. For 130658/130658 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24323 event pairs, 272 based on Foata normal form. 232/4533 useless extension candidates. Maximal degree in co-relation 29031. Up to 1856 conditions per place. [2022-12-13 16:28:20,404 INFO L137 encePairwiseOnDemand]: 301/312 looper letters, 358 selfloop transitions, 345 changer transitions 5/708 dead transitions. [2022-12-13 16:28:20,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 708 transitions, 9680 flow [2022-12-13 16:28:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 16:28:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 16:28:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3456 transitions. [2022-12-13 16:28:20,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2701688555347092 [2022-12-13 16:28:20,409 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3456 transitions. [2022-12-13 16:28:20,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3456 transitions. [2022-12-13 16:28:20,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:28:20,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3456 transitions. [2022-12-13 16:28:20,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 84.29268292682927) internal successors, (3456), 41 states have internal predecessors, (3456), 0 states have call successors, (0), 0 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 16:28:20,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 312.0) internal successors, (13104), 42 states have internal predecessors, (13104), 0 states have call successors, (0), 0 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 16:28:20,424 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 312.0) internal successors, (13104), 42 states have internal predecessors, (13104), 0 states have call successors, (0), 0 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 16:28:20,424 INFO L175 Difference]: Start difference. First operand has 238 places, 480 transitions, 5991 flow. Second operand 41 states and 3456 transitions. [2022-12-13 16:28:20,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 708 transitions, 9680 flow [2022-12-13 16:28:20,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 708 transitions, 8825 flow, removed 348 selfloop flow, removed 15 redundant places. [2022-12-13 16:28:20,686 INFO L231 Difference]: Finished difference. Result has 275 places, 618 transitions, 8126 flow [2022-12-13 16:28:20,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=4797, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8126, PETRI_PLACES=275, PETRI_TRANSITIONS=618} [2022-12-13 16:28:20,687 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2022-12-13 16:28:20,687 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 618 transitions, 8126 flow [2022-12-13 16:28:20,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.27272727272727) internal successors, (2682), 33 states have internal predecessors, (2682), 0 states have call successors, (0), 0 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 16:28:20,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:28:20,687 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:28:20,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 16:28:20,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:28:20,889 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:28:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:28:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1784678842, now seen corresponding path program 3 times [2022-12-13 16:28:20,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:28:20,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147491053] [2022-12-13 16:28:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:28:20,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:28:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:28:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:21,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:28:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147491053] [2022-12-13 16:28:21,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147491053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:28:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773973165] [2022-12-13 16:28:21,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:28:21,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:21,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:28:21,647 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:28:21,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:28:21,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:28:21,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:28:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 16:28:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:28:21,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:28:21,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:28:21,889 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 16:28:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:28:21,944 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 16:28:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:22,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:28:23,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:28:23,182 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 124 treesize of output 88 [2022-12-13 16:28:23,234 INFO L321 Elim1Store]: treesize reduction 14, result has 86.7 percent of original size [2022-12-13 16:28:23,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 283 treesize of output 331 [2022-12-13 16:28:23,269 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 16:28:23,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 222 [2022-12-13 16:28:23,304 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 16:28:23,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 167 [2022-12-13 16:28:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:25,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773973165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:28:25,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:28:25,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-13 16:28:25,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272384522] [2022-12-13 16:28:25,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:28:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:28:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:28:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:28:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=788, Unknown=1, NotChecked=0, Total=992 [2022-12-13 16:28:27,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:28:27,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 618 transitions, 8126 flow. Second operand has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 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 16:28:27,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:28:27,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:28:27,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:28:32,311 INFO L130 PetriNetUnfolder]: 2497/4101 cut-off events. [2022-12-13 16:28:32,312 INFO L131 PetriNetUnfolder]: For 146301/146301 co-relation queries the response was YES. [2022-12-13 16:28:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30089 conditions, 4101 events. 2497/4101 cut-off events. For 146301/146301 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22530 event pairs, 372 based on Foata normal form. 56/4157 useless extension candidates. Maximal degree in co-relation 30010. Up to 3296 conditions per place. [2022-12-13 16:28:32,339 INFO L137 encePairwiseOnDemand]: 303/312 looper letters, 544 selfloop transitions, 110 changer transitions 7/661 dead transitions. [2022-12-13 16:28:32,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 661 transitions, 10094 flow [2022-12-13 16:28:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 16:28:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 16:28:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2762 transitions. [2022-12-13 16:28:32,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.26825951825951827 [2022-12-13 16:28:32,342 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2762 transitions. [2022-12-13 16:28:32,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2762 transitions. [2022-12-13 16:28:32,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:28:32,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2762 transitions. [2022-12-13 16:28:32,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 83.6969696969697) internal successors, (2762), 33 states have internal predecessors, (2762), 0 states have call successors, (0), 0 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 16:28:32,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 312.0) internal successors, (10608), 34 states have internal predecessors, (10608), 0 states have call successors, (0), 0 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 16:28:32,350 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 312.0) internal successors, (10608), 34 states have internal predecessors, (10608), 0 states have call successors, (0), 0 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 16:28:32,350 INFO L175 Difference]: Start difference. First operand has 275 places, 618 transitions, 8126 flow. Second operand 33 states and 2762 transitions. [2022-12-13 16:28:32,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 661 transitions, 10094 flow [2022-12-13 16:28:32,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 661 transitions, 8369 flow, removed 786 selfloop flow, removed 26 redundant places. [2022-12-13 16:28:32,684 INFO L231 Difference]: Finished difference. Result has 281 places, 568 transitions, 6698 flow [2022-12-13 16:28:32,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6698, PETRI_PLACES=281, PETRI_TRANSITIONS=568} [2022-12-13 16:28:32,684 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2022-12-13 16:28:32,684 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 568 transitions, 6698 flow [2022-12-13 16:28:32,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.3125) internal successors, (2602), 32 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 16:28:32,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:28:32,685 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:28:32,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 16:28:32,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:28:32,886 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:28:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:28:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash -834604897, now seen corresponding path program 4 times [2022-12-13 16:28:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:28:32,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346552346] [2022-12-13 16:28:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:28:32,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:28:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:28:33,757 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 16:28:33,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:28:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346552346] [2022-12-13 16:28:33,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346552346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:28:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435784174] [2022-12-13 16:28:33,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:28:33,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:33,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:28:33,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:28:33,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:28:33,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:28:33,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:28:33,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 16:28:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:28:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:28:34,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:28:34,596 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-12-13 16:28:34,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 233 [2022-12-13 16:28:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:28:34,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435784174] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:28:34,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:28:34,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 26 [2022-12-13 16:28:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112044032] [2022-12-13 16:28:34,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:28:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:28:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:28:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:28:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:28:36,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 312 [2022-12-13 16:28:36,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 568 transitions, 6698 flow. Second operand has 28 states, 28 states have (on average 107.64285714285714) internal successors, (3014), 28 states have internal predecessors, (3014), 0 states have call successors, (0), 0 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 16:28:36,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:28:36,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 312 [2022-12-13 16:28:36,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:28:47,659 INFO L130 PetriNetUnfolder]: 3409/5581 cut-off events. [2022-12-13 16:28:47,659 INFO L131 PetriNetUnfolder]: For 268091/268091 co-relation queries the response was YES. [2022-12-13 16:28:47,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44349 conditions, 5581 events. 3409/5581 cut-off events. For 268091/268091 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32780 event pairs, 248 based on Foata normal form. 132/5709 useless extension candidates. Maximal degree in co-relation 44267. Up to 3247 conditions per place. [2022-12-13 16:28:47,698 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 575 selfloop transitions, 346 changer transitions 9/930 dead transitions. [2022-12-13 16:28:47,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 930 transitions, 13918 flow [2022-12-13 16:28:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 16:28:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-13 16:28:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 8273 transitions. [2022-12-13 16:28:47,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35354700854700855 [2022-12-13 16:28:47,704 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 8273 transitions. [2022-12-13 16:28:47,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 8273 transitions. [2022-12-13 16:28:47,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:28:47,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 8273 transitions. [2022-12-13 16:28:47,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 110.30666666666667) internal successors, (8273), 75 states have internal predecessors, (8273), 0 states have call successors, (0), 0 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 16:28:47,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 312.0) internal successors, (23712), 76 states have internal predecessors, (23712), 0 states have call successors, (0), 0 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 16:28:47,724 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 312.0) internal successors, (23712), 76 states have internal predecessors, (23712), 0 states have call successors, (0), 0 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 16:28:47,724 INFO L175 Difference]: Start difference. First operand has 281 places, 568 transitions, 6698 flow. Second operand 75 states and 8273 transitions. [2022-12-13 16:28:47,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 930 transitions, 13918 flow [2022-12-13 16:28:48,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 930 transitions, 13574 flow, removed 114 selfloop flow, removed 24 redundant places. [2022-12-13 16:28:48,246 INFO L231 Difference]: Finished difference. Result has 335 places, 785 transitions, 12296 flow [2022-12-13 16:28:48,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=12296, PETRI_PLACES=335, PETRI_TRANSITIONS=785} [2022-12-13 16:28:48,246 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2022-12-13 16:28:48,246 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 785 transitions, 12296 flow [2022-12-13 16:28:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 107.64285714285714) internal successors, (3014), 28 states have internal predecessors, (3014), 0 states have call successors, (0), 0 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 16:28:48,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:28:48,247 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:28:48,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 16:28:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:48,448 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:28:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:28:48,449 INFO L85 PathProgramCache]: Analyzing trace with hash -831837217, now seen corresponding path program 5 times [2022-12-13 16:28:48,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:28:48,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899884278] [2022-12-13 16:28:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:28:48,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:28:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:28:49,075 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 16:28:49,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:28:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899884278] [2022-12-13 16:28:49,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899884278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:28:49,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192203188] [2022-12-13 16:28:49,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:28:49,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:49,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:28:49,076 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:28:49,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 16:28:49,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:28:49,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:28:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 16:28:49,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:28:49,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 16:28:49,238 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 16:28:49,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:28:49,295 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 6 treesize of output 5 [2022-12-13 16:28:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:49,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:28:50,810 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~back~0_168 Int) (v_ArrVal_639 (Array Int Int)) (~front~0 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_639) c_~queue~0.base)) (.cse2 (* v_~back~0_168 4))) (or (< (let ((.cse1 (* ~front~0 4))) (+ c_~sum~0 (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)))) 2147483648) (not (< ~front~0 v_~back~0_168)) (<= c_~n~0 (+ v_~back~0_168 1)) (< 2147483645 v_~back~0_168) (not (= (+ (select .cse0 (+ c_~queue~0.offset .cse2)) 1) 0)) (not (= (select .cse0 (+ c_~queue~0.offset 4 .cse2)) 1)) (not (= (select .cse0 (+ c_~queue~0.offset (- 4) .cse2)) 1)) (< ~front~0 0)))) is different from false [2022-12-13 16:28:51,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:28:51,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 119 [2022-12-13 16:28:51,134 INFO L321 Elim1Store]: treesize reduction 38, result has 53.1 percent of original size [2022-12-13 16:28:51,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 724 treesize of output 680 [2022-12-13 16:28:51,173 INFO L321 Elim1Store]: treesize reduction 38, result has 53.1 percent of original size [2022-12-13 16:28:51,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 638 treesize of output 614 [2022-12-13 16:28:51,210 INFO L321 Elim1Store]: treesize reduction 38, result has 53.1 percent of original size [2022-12-13 16:28:51,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 572 treesize of output 482 [2022-12-13 16:28:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:51,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192203188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:28:51,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:28:51,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2022-12-13 16:28:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309786903] [2022-12-13 16:28:51,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:28:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 16:28:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:28:51,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 16:28:51,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1190, Unknown=2, NotChecked=72, Total=1482 [2022-12-13 16:28:52,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:28:52,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 785 transitions, 12296 flow. Second operand has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 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 16:28:52,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:28:52,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:28:52,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:29:08,931 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 [0, 1] [2022-12-13 16:29:11,007 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 [0, 1] [2022-12-13 16:29:13,088 INFO L130 PetriNetUnfolder]: 4665/7677 cut-off events. [2022-12-13 16:29:13,088 INFO L131 PetriNetUnfolder]: For 384096/384096 co-relation queries the response was YES. [2022-12-13 16:29:13,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67850 conditions, 7677 events. 4665/7677 cut-off events. For 384096/384096 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 48561 event pairs, 476 based on Foata normal form. 68/7741 useless extension candidates. Maximal degree in co-relation 67764. Up to 2496 conditions per place. [2022-12-13 16:29:13,161 INFO L137 encePairwiseOnDemand]: 300/312 looper letters, 754 selfloop transitions, 561 changer transitions 6/1321 dead transitions. [2022-12-13 16:29:13,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1321 transitions, 27913 flow [2022-12-13 16:29:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 16:29:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-13 16:29:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5315 transitions. [2022-12-13 16:29:13,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2704008954008954 [2022-12-13 16:29:13,166 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5315 transitions. [2022-12-13 16:29:13,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5315 transitions. [2022-12-13 16:29:13,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:29:13,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5315 transitions. [2022-12-13 16:29:13,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 84.36507936507937) internal successors, (5315), 63 states have internal predecessors, (5315), 0 states have call successors, (0), 0 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 16:29:13,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 312.0) internal successors, (19968), 64 states have internal predecessors, (19968), 0 states have call successors, (0), 0 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 16:29:13,181 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 312.0) internal successors, (19968), 64 states have internal predecessors, (19968), 0 states have call successors, (0), 0 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 16:29:13,181 INFO L175 Difference]: Start difference. First operand has 335 places, 785 transitions, 12296 flow. Second operand 63 states and 5315 transitions. [2022-12-13 16:29:13,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1321 transitions, 27913 flow [2022-12-13 16:29:14,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1321 transitions, 17202 flow, removed 5309 selfloop flow, removed 17 redundant places. [2022-12-13 16:29:14,988 INFO L231 Difference]: Finished difference. Result has 401 places, 1098 transitions, 14752 flow [2022-12-13 16:29:14,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=14752, PETRI_PLACES=401, PETRI_TRANSITIONS=1098} [2022-12-13 16:29:14,988 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 371 predicate places. [2022-12-13 16:29:14,988 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1098 transitions, 14752 flow [2022-12-13 16:29:14,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 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 16:29:14,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:29:14,989 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:29:14,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 16:29:15,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:15,190 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:29:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:29:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1384404960, now seen corresponding path program 4 times [2022-12-13 16:29:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:29:15,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375085626] [2022-12-13 16:29:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:29:15,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:29:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:29:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 16:29:15,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:29:15,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375085626] [2022-12-13 16:29:15,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375085626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:29:15,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412142246] [2022-12-13 16:29:15,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:29:15,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:15,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:29:15,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:29:15,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 16:29:15,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:29:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:29:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:29:15,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:29:15,485 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 154 treesize of output 122 [2022-12-13 16:29:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:29:15,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:29:15,610 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 14 treesize of output 6 [2022-12-13 16:29:15,614 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 16:29:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:29:15,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412142246] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:29:15,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:29:15,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2022-12-13 16:29:15,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927967904] [2022-12-13 16:29:15,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:29:15,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:29:15,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:29:15,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:29:15,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:29:15,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 312 [2022-12-13 16:29:15,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1098 transitions, 14752 flow. Second operand has 20 states, 20 states have (on average 122.15) internal successors, (2443), 20 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 16:29:15,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:29:15,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 312 [2022-12-13 16:29:15,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:29:18,073 INFO L130 PetriNetUnfolder]: 3636/6187 cut-off events. [2022-12-13 16:29:18,073 INFO L131 PetriNetUnfolder]: For 152419/152419 co-relation queries the response was YES. [2022-12-13 16:29:18,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41739 conditions, 6187 events. 3636/6187 cut-off events. For 152419/152419 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 40015 event pairs, 481 based on Foata normal form. 368/6537 useless extension candidates. Maximal degree in co-relation 41633. Up to 4611 conditions per place. [2022-12-13 16:29:18,126 INFO L137 encePairwiseOnDemand]: 304/312 looper letters, 689 selfloop transitions, 97 changer transitions 127/917 dead transitions. [2022-12-13 16:29:18,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 917 transitions, 15195 flow [2022-12-13 16:29:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:29:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 16:29:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2127 transitions. [2022-12-13 16:29:18,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40101809954751133 [2022-12-13 16:29:18,130 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2127 transitions. [2022-12-13 16:29:18,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2127 transitions. [2022-12-13 16:29:18,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:29:18,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2127 transitions. [2022-12-13 16:29:18,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 125.11764705882354) internal successors, (2127), 17 states have internal predecessors, (2127), 0 states have call successors, (0), 0 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 16:29:18,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 312.0) internal successors, (5616), 18 states have internal predecessors, (5616), 0 states have call successors, (0), 0 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 16:29:18,136 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 312.0) internal successors, (5616), 18 states have internal predecessors, (5616), 0 states have call successors, (0), 0 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 16:29:18,136 INFO L175 Difference]: Start difference. First operand has 401 places, 1098 transitions, 14752 flow. Second operand 17 states and 2127 transitions. [2022-12-13 16:29:18,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 917 transitions, 15195 flow [2022-12-13 16:29:19,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 917 transitions, 13391 flow, removed 851 selfloop flow, removed 24 redundant places. [2022-12-13 16:29:19,155 INFO L231 Difference]: Finished difference. Result has 382 places, 778 transitions, 10230 flow [2022-12-13 16:29:19,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=10404, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10230, PETRI_PLACES=382, PETRI_TRANSITIONS=778} [2022-12-13 16:29:19,155 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 352 predicate places. [2022-12-13 16:29:19,155 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 778 transitions, 10230 flow [2022-12-13 16:29:19,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 122.15) internal successors, (2443), 20 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 16:29:19,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:29:19,156 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:29:19,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 16:29:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:19,357 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:29:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:29:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1635731811, now seen corresponding path program 6 times [2022-12-13 16:29:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:29:19,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990628679] [2022-12-13 16:29:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:29:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:29:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:29:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:29:21,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:29:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990628679] [2022-12-13 16:29:21,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990628679] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:29:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765286722] [2022-12-13 16:29:21,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:29:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:29:21,582 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:29:21,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 16:29:21,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:29:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:29:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 16:29:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:29:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:29:21,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:29:22,462 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-12-13 16:29:22,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 270 treesize of output 236 [2022-12-13 16:29:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:29:22,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765286722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:29:22,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:29:22,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2022-12-13 16:29:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816575721] [2022-12-13 16:29:22,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:29:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:29:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:29:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:29:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-12-13 16:29:24,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 312 [2022-12-13 16:29:24,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 778 transitions, 10230 flow. Second operand has 27 states, 27 states have (on average 102.51851851851852) internal successors, (2768), 27 states have internal predecessors, (2768), 0 states have call successors, (0), 0 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 16:29:24,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:29:24,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 312 [2022-12-13 16:29:24,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:29:26,819 INFO L130 PetriNetUnfolder]: 3293/5504 cut-off events. [2022-12-13 16:29:26,819 INFO L131 PetriNetUnfolder]: For 111149/111149 co-relation queries the response was YES. [2022-12-13 16:29:26,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35813 conditions, 5504 events. 3293/5504 cut-off events. For 111149/111149 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33815 event pairs, 192 based on Foata normal form. 64/5556 useless extension candidates. Maximal degree in co-relation 35710. Up to 2008 conditions per place. [2022-12-13 16:29:26,862 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 503 selfloop transitions, 337 changer transitions 6/846 dead transitions. [2022-12-13 16:29:26,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 846 transitions, 12589 flow [2022-12-13 16:29:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:29:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:29:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2098 transitions. [2022-12-13 16:29:26,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33621794871794874 [2022-12-13 16:29:26,865 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2098 transitions. [2022-12-13 16:29:26,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2098 transitions. [2022-12-13 16:29:26,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:29:26,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2098 transitions. [2022-12-13 16:29:26,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 104.9) internal successors, (2098), 20 states have internal predecessors, (2098), 0 states have call successors, (0), 0 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 16:29:26,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 312.0) internal successors, (6552), 21 states have internal predecessors, (6552), 0 states have call successors, (0), 0 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 16:29:26,870 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 312.0) internal successors, (6552), 21 states have internal predecessors, (6552), 0 states have call successors, (0), 0 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 16:29:26,870 INFO L175 Difference]: Start difference. First operand has 382 places, 778 transitions, 10230 flow. Second operand 20 states and 2098 transitions. [2022-12-13 16:29:26,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 846 transitions, 12589 flow [2022-12-13 16:29:27,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 846 transitions, 11698 flow, removed 345 selfloop flow, removed 40 redundant places. [2022-12-13 16:29:27,503 INFO L231 Difference]: Finished difference. Result has 302 places, 772 transitions, 10295 flow [2022-12-13 16:29:27,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=9233, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10295, PETRI_PLACES=302, PETRI_TRANSITIONS=772} [2022-12-13 16:29:27,503 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2022-12-13 16:29:27,504 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 772 transitions, 10295 flow [2022-12-13 16:29:27,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 102.51851851851852) internal successors, (2768), 27 states have internal predecessors, (2768), 0 states have call successors, (0), 0 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 16:29:27,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:29:27,504 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:29:27,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 16:29:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:27,705 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:29:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:29:27,706 INFO L85 PathProgramCache]: Analyzing trace with hash -834604895, now seen corresponding path program 5 times [2022-12-13 16:29:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:29:27,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731159620] [2022-12-13 16:29:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:29:27,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:29:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:29:28,521 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 16:29:28,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:29:28,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731159620] [2022-12-13 16:29:28,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731159620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:29:28,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464944409] [2022-12-13 16:29:28,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:29:28,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:28,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:29:28,522 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:29:28,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 16:29:28,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:29:28,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:29:28,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 16:29:28,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:29:28,682 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 16:29:28,754 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-13 16:29:28,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-12-13 16:29:28,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:29:28,844 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 33 treesize of output 35 [2022-12-13 16:29:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:29:28,927 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 33 treesize of output 35 [2022-12-13 16:29:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:29:29,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:29:31,113 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-12-13 16:29:31,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 190 treesize of output 128 [2022-12-13 16:29:31,189 INFO L321 Elim1Store]: treesize reduction 42, result has 71.4 percent of original size [2022-12-13 16:29:31,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 753 treesize of output 763 [2022-12-13 16:29:31,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:29:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:29:31,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:29:31,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:29:31,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 545 treesize of output 517 [2022-12-13 16:29:31,269 INFO L321 Elim1Store]: treesize reduction 42, result has 48.1 percent of original size [2022-12-13 16:29:31,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 580 treesize of output 486 [2022-12-13 16:29:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:29:41,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464944409] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:29:41,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:29:41,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2022-12-13 16:29:41,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884745959] [2022-12-13 16:29:41,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:29:41,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 16:29:41,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:29:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 16:29:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1226, Unknown=2, NotChecked=0, Total=1482 [2022-12-13 16:29:45,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:29:45,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 772 transitions, 10295 flow. Second operand has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 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 16:29:45,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:29:45,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:29:45,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:29:58,280 INFO L130 PetriNetUnfolder]: 3661/6168 cut-off events. [2022-12-13 16:29:58,280 INFO L131 PetriNetUnfolder]: For 74720/74720 co-relation queries the response was YES. [2022-12-13 16:29:58,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40150 conditions, 6168 events. 3661/6168 cut-off events. For 74720/74720 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 41277 event pairs, 362 based on Foata normal form. 160/6328 useless extension candidates. Maximal degree in co-relation 40072. Up to 2196 conditions per place. [2022-12-13 16:29:58,323 INFO L137 encePairwiseOnDemand]: 301/312 looper letters, 338 selfloop transitions, 627 changer transitions 7/972 dead transitions. [2022-12-13 16:29:58,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 972 transitions, 15508 flow [2022-12-13 16:29:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 16:29:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 16:29:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4555 transitions. [2022-12-13 16:29:58,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2703584995251662 [2022-12-13 16:29:58,327 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4555 transitions. [2022-12-13 16:29:58,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4555 transitions. [2022-12-13 16:29:58,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:29:58,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4555 transitions. [2022-12-13 16:29:58,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 84.35185185185185) internal successors, (4555), 54 states have internal predecessors, (4555), 0 states have call successors, (0), 0 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 16:29:58,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 312.0) internal successors, (17160), 55 states have internal predecessors, (17160), 0 states have call successors, (0), 0 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 16:29:58,342 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 312.0) internal successors, (17160), 55 states have internal predecessors, (17160), 0 states have call successors, (0), 0 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 16:29:58,342 INFO L175 Difference]: Start difference. First operand has 302 places, 772 transitions, 10295 flow. Second operand 54 states and 4555 transitions. [2022-12-13 16:29:58,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 972 transitions, 15508 flow [2022-12-13 16:29:58,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 972 transitions, 15000 flow, removed 86 selfloop flow, removed 19 redundant places. [2022-12-13 16:29:58,776 INFO L231 Difference]: Finished difference. Result has 325 places, 856 transitions, 14720 flow [2022-12-13 16:29:58,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=8041, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=14720, PETRI_PLACES=325, PETRI_TRANSITIONS=856} [2022-12-13 16:29:58,776 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2022-12-13 16:29:58,776 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 856 transitions, 14720 flow [2022-12-13 16:29:58,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 81.23076923076923) internal successors, (3168), 39 states have internal predecessors, (3168), 0 states have call successors, (0), 0 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 16:29:58,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:29:58,777 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:29:58,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 16:29:58,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:58,978 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:29:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:29:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash -531635461, now seen corresponding path program 6 times [2022-12-13 16:29:58,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:29:58,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937558083] [2022-12-13 16:29:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:29:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:29:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:29:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:29:59,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:29:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937558083] [2022-12-13 16:29:59,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937558083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:29:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551714832] [2022-12-13 16:29:59,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:29:59,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:29:59,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:29:59,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:29:59,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 16:29:59,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:29:59,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:29:59,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 16:29:59,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:29:59,802 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 16 treesize of output 12 [2022-12-13 16:29:59,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 16:29:59,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:29:59,928 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 16:29:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:29:59,984 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 16:30:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:00,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:30:02,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:02,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 136 [2022-12-13 16:30:02,631 INFO L321 Elim1Store]: treesize reduction 14, result has 93.0 percent of original size [2022-12-13 16:30:02,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 813 treesize of output 887 [2022-12-13 16:30:02,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:30:02,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:30:02,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 570 treesize of output 596 [2022-12-13 16:30:02,820 INFO L321 Elim1Store]: treesize reduction 14, result has 88.4 percent of original size [2022-12-13 16:30:02,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 616 treesize of output 562 [2022-12-13 16:30:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:30:29,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551714832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:30:29,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:30:29,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2022-12-13 16:30:29,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945544983] [2022-12-13 16:30:29,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:30:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 16:30:29,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:30:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 16:30:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1423, Unknown=4, NotChecked=0, Total=1722 [2022-12-13 16:30:30,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:30:30,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 856 transitions, 14720 flow. Second operand has 42 states, 42 states have (on average 81.28571428571429) internal successors, (3414), 42 states have internal predecessors, (3414), 0 states have call successors, (0), 0 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 16:30:30,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:30:30,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:30:30,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:00,844 INFO L130 PetriNetUnfolder]: 3660/6124 cut-off events. [2022-12-13 16:31:00,844 INFO L131 PetriNetUnfolder]: For 122562/122562 co-relation queries the response was YES. [2022-12-13 16:31:00,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48354 conditions, 6124 events. 3660/6124 cut-off events. For 122562/122562 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39549 event pairs, 227 based on Foata normal form. 260/6384 useless extension candidates. Maximal degree in co-relation 48265. Up to 2040 conditions per place. [2022-12-13 16:31:00,892 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 463 selfloop transitions, 666 changer transitions 10/1139 dead transitions. [2022-12-13 16:31:00,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1139 transitions, 22293 flow [2022-12-13 16:31:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-13 16:31:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-12-13 16:31:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 9797 transitions. [2022-12-13 16:31:00,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2706951812555261 [2022-12-13 16:31:00,901 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 9797 transitions. [2022-12-13 16:31:00,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 9797 transitions. [2022-12-13 16:31:00,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:00,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 9797 transitions. [2022-12-13 16:31:00,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 84.45689655172414) internal successors, (9797), 116 states have internal predecessors, (9797), 0 states have call successors, (0), 0 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 16:31:00,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 312.0) internal successors, (36504), 117 states have internal predecessors, (36504), 0 states have call successors, (0), 0 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 16:31:00,965 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 312.0) internal successors, (36504), 117 states have internal predecessors, (36504), 0 states have call successors, (0), 0 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 16:31:00,965 INFO L175 Difference]: Start difference. First operand has 325 places, 856 transitions, 14720 flow. Second operand 116 states and 9797 transitions. [2022-12-13 16:31:00,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1139 transitions, 22293 flow [2022-12-13 16:31:01,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1139 transitions, 17999 flow, removed 2043 selfloop flow, removed 37 redundant places. [2022-12-13 16:31:01,618 INFO L231 Difference]: Finished difference. Result has 407 places, 913 transitions, 17383 flow [2022-12-13 16:31:01,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=17383, PETRI_PLACES=407, PETRI_TRANSITIONS=913} [2022-12-13 16:31:01,619 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2022-12-13 16:31:01,619 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 913 transitions, 17383 flow [2022-12-13 16:31:01,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 81.28571428571429) internal successors, (3414), 42 states have internal predecessors, (3414), 0 states have call successors, (0), 0 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 16:31:01,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:01,619 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:01,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 16:31:01,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:01,821 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:31:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash -494212037, now seen corresponding path program 7 times [2022-12-13 16:31:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:01,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795013958] [2022-12-13 16:31:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795013958] [2022-12-13 16:31:02,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795013958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090673189] [2022-12-13 16:31:02,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:31:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:02,300 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:02,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 16:31:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:02,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 16:31:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:02,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:03,425 INFO L321 Elim1Store]: treesize reduction 26, result has 62.3 percent of original size [2022-12-13 16:31:03,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 293 treesize of output 260 [2022-12-13 16:31:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:04,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090673189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:04,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:04,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 36 [2022-12-13 16:31:04,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559717880] [2022-12-13 16:31:04,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:04,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 16:31:04,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:04,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 16:31:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 16:31:05,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 312 [2022-12-13 16:31:05,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 913 transitions, 17383 flow. Second operand has 38 states, 38 states have (on average 109.42105263157895) internal successors, (4158), 38 states have internal predecessors, (4158), 0 states have call successors, (0), 0 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 16:31:05,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:05,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 312 [2022-12-13 16:31:05,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:09,658 INFO L130 PetriNetUnfolder]: 3878/6538 cut-off events. [2022-12-13 16:31:09,658 INFO L131 PetriNetUnfolder]: For 95374/95374 co-relation queries the response was YES. [2022-12-13 16:31:09,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47311 conditions, 6538 events. 3878/6538 cut-off events. For 95374/95374 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42452 event pairs, 356 based on Foata normal form. 148/6686 useless extension candidates. Maximal degree in co-relation 47192. Up to 2707 conditions per place. [2022-12-13 16:31:09,710 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 649 selfloop transitions, 375 changer transitions 8/1032 dead transitions. [2022-12-13 16:31:09,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1032 transitions, 20743 flow [2022-12-13 16:31:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 16:31:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 16:31:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3826 transitions. [2022-12-13 16:31:09,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3606711915535445 [2022-12-13 16:31:09,713 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3826 transitions. [2022-12-13 16:31:09,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3826 transitions. [2022-12-13 16:31:09,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:09,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3826 transitions. [2022-12-13 16:31:09,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 112.52941176470588) internal successors, (3826), 34 states have internal predecessors, (3826), 0 states have call successors, (0), 0 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 16:31:09,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 312.0) internal successors, (10920), 35 states have internal predecessors, (10920), 0 states have call successors, (0), 0 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 16:31:09,723 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 312.0) internal successors, (10920), 35 states have internal predecessors, (10920), 0 states have call successors, (0), 0 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 16:31:09,723 INFO L175 Difference]: Start difference. First operand has 407 places, 913 transitions, 17383 flow. Second operand 34 states and 3826 transitions. [2022-12-13 16:31:09,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1032 transitions, 20743 flow [2022-12-13 16:31:10,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1032 transitions, 15602 flow, removed 2356 selfloop flow, removed 50 redundant places. [2022-12-13 16:31:10,436 INFO L231 Difference]: Finished difference. Result has 396 places, 916 transitions, 13623 flow [2022-12-13 16:31:10,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=11082, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13623, PETRI_PLACES=396, PETRI_TRANSITIONS=916} [2022-12-13 16:31:10,437 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2022-12-13 16:31:10,437 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 916 transitions, 13623 flow [2022-12-13 16:31:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 109.42105263157895) internal successors, (4158), 38 states have internal predecessors, (4158), 0 states have call successors, (0), 0 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 16:31:10,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:10,437 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:10,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 16:31:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:31:10,638 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:31:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -494125549, now seen corresponding path program 7 times [2022-12-13 16:31:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017464874] [2022-12-13 16:31:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:11,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017464874] [2022-12-13 16:31:11,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017464874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454596749] [2022-12-13 16:31:11,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:31:11,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:11,741 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:11,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 16:31:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 16:31:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:11,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:31:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:31:12,016 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 16:31:12,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:31:12,077 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 16:31:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:12,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:14,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:31:14,105 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 182 treesize of output 122 [2022-12-13 16:31:14,241 INFO L321 Elim1Store]: treesize reduction 14, result has 93.0 percent of original size [2022-12-13 16:31:14,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 387 treesize of output 513 [2022-12-13 16:31:14,337 INFO L321 Elim1Store]: treesize reduction 14, result has 88.4 percent of original size [2022-12-13 16:31:14,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 350 [2022-12-13 16:31:14,428 INFO L321 Elim1Store]: treesize reduction 14, result has 88.4 percent of original size [2022-12-13 16:31:14,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 281 [2022-12-13 16:31:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:29,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454596749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:29,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:29,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2022-12-13 16:31:29,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490811701] [2022-12-13 16:31:29,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:29,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 16:31:29,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 16:31:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1660, Unknown=2, NotChecked=0, Total=1980 [2022-12-13 16:31:35,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:31:35,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 916 transitions, 13623 flow. Second operand has 45 states, 45 states have (on average 81.2) internal successors, (3654), 45 states have internal predecessors, (3654), 0 states have call successors, (0), 0 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 16:31:35,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:35,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:31:35,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:42,797 INFO L130 PetriNetUnfolder]: 2055/3594 cut-off events. [2022-12-13 16:31:42,798 INFO L131 PetriNetUnfolder]: For 55412/55412 co-relation queries the response was YES. [2022-12-13 16:31:42,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25065 conditions, 3594 events. 2055/3594 cut-off events. For 55412/55412 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22096 event pairs, 344 based on Foata normal form. 112/3702 useless extension candidates. Maximal degree in co-relation 24959. Up to 2068 conditions per place. [2022-12-13 16:31:42,824 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 333 selfloop transitions, 171 changer transitions 26/530 dead transitions. [2022-12-13 16:31:42,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 530 transitions, 9289 flow [2022-12-13 16:31:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 16:31:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-13 16:31:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4276 transitions. [2022-12-13 16:31:42,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.26872800402212166 [2022-12-13 16:31:42,827 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4276 transitions. [2022-12-13 16:31:42,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4276 transitions. [2022-12-13 16:31:42,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:42,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4276 transitions. [2022-12-13 16:31:42,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 83.84313725490196) internal successors, (4276), 51 states have internal predecessors, (4276), 0 states have call successors, (0), 0 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 16:31:42,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 312.0) internal successors, (16224), 52 states have internal predecessors, (16224), 0 states have call successors, (0), 0 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 16:31:42,838 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 312.0) internal successors, (16224), 52 states have internal predecessors, (16224), 0 states have call successors, (0), 0 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 16:31:42,838 INFO L175 Difference]: Start difference. First operand has 396 places, 916 transitions, 13623 flow. Second operand 51 states and 4276 transitions. [2022-12-13 16:31:42,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 530 transitions, 9289 flow [2022-12-13 16:31:43,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 530 transitions, 8668 flow, removed 199 selfloop flow, removed 42 redundant places. [2022-12-13 16:31:43,116 INFO L231 Difference]: Finished difference. Result has 340 places, 410 transitions, 7175 flow [2022-12-13 16:31:43,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7175, PETRI_PLACES=340, PETRI_TRANSITIONS=410} [2022-12-13 16:31:43,117 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 310 predicate places. [2022-12-13 16:31:43,117 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 410 transitions, 7175 flow [2022-12-13 16:31:43,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 81.2) internal successors, (3654), 45 states have internal predecessors, (3654), 0 states have call successors, (0), 0 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 16:31:43,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:43,117 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:43,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 16:31:43,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 16:31:43,318 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:31:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1648844922, now seen corresponding path program 8 times [2022-12-13 16:31:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:43,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242755779] [2022-12-13 16:31:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:31:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:45,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242755779] [2022-12-13 16:31:45,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242755779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:45,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199039532] [2022-12-13 16:31:45,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:31:45,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:45,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:45,132 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:45,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 16:31:45,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:31:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:31:45,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 16:31:45,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:31:45,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:46,178 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-12-13 16:31:46,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 242 [2022-12-13 16:31:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 16:31:46,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199039532] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:31:46,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:31:46,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 5] total 28 [2022-12-13 16:31:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462385175] [2022-12-13 16:31:46,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:31:46,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:31:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:31:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:31:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:31:48,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 312 [2022-12-13 16:31:48,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 410 transitions, 7175 flow. Second operand has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 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 16:31:48,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:31:48,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 312 [2022-12-13 16:31:48,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:31:51,413 INFO L130 PetriNetUnfolder]: 2281/3960 cut-off events. [2022-12-13 16:31:51,413 INFO L131 PetriNetUnfolder]: For 54705/54705 co-relation queries the response was YES. [2022-12-13 16:31:51,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27901 conditions, 3960 events. 2281/3960 cut-off events. For 54705/54705 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 24443 event pairs, 238 based on Foata normal form. 32/3984 useless extension candidates. Maximal degree in co-relation 27800. Up to 2205 conditions per place. [2022-12-13 16:31:51,446 INFO L137 encePairwiseOnDemand]: 304/312 looper letters, 254 selfloop transitions, 244 changer transitions 6/504 dead transitions. [2022-12-13 16:31:51,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 504 transitions, 9247 flow [2022-12-13 16:31:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:31:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 16:31:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2469 transitions. [2022-12-13 16:31:51,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3440635451505017 [2022-12-13 16:31:51,449 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2469 transitions. [2022-12-13 16:31:51,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2469 transitions. [2022-12-13 16:31:51,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:31:51,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2469 transitions. [2022-12-13 16:31:51,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.34782608695652) internal successors, (2469), 23 states have internal predecessors, (2469), 0 states have call successors, (0), 0 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 16:31:51,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 312.0) internal successors, (7488), 24 states have internal predecessors, (7488), 0 states have call successors, (0), 0 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 16:31:51,454 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 312.0) internal successors, (7488), 24 states have internal predecessors, (7488), 0 states have call successors, (0), 0 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 16:31:51,454 INFO L175 Difference]: Start difference. First operand has 340 places, 410 transitions, 7175 flow. Second operand 23 states and 2469 transitions. [2022-12-13 16:31:51,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 504 transitions, 9247 flow [2022-12-13 16:31:51,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 504 transitions, 9065 flow, removed 25 selfloop flow, removed 34 redundant places. [2022-12-13 16:31:51,740 INFO L231 Difference]: Finished difference. Result has 329 places, 452 transitions, 8433 flow [2022-12-13 16:31:51,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8433, PETRI_PLACES=329, PETRI_TRANSITIONS=452} [2022-12-13 16:31:51,740 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2022-12-13 16:31:51,741 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 452 transitions, 8433 flow [2022-12-13 16:31:51,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 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 16:31:51,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:31:51,741 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:31:51,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 16:31:51,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 16:31:51,942 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:31:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:31:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1709345180, now seen corresponding path program 8 times [2022-12-13 16:31:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:31:51,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98618329] [2022-12-13 16:31:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:31:51,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:31:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:31:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:31:53,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:31:53,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98618329] [2022-12-13 16:31:53,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98618329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:31:53,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851638828] [2022-12-13 16:31:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:31:53,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:31:53,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:31:53,760 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:31:53,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 16:31:53,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:31:53,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:31:53,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 16:31:53,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:31:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:31:54,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:31:56,009 INFO L321 Elim1Store]: treesize reduction 81, result has 66.9 percent of original size [2022-12-13 16:31:56,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 417 treesize of output 414 [2022-12-13 16:31:58,654 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 16:32:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:32:02,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851638828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:02,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:02,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 36 [2022-12-13 16:32:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522327146] [2022-12-13 16:32:02,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 16:32:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 16:32:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 16:32:06,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 312 [2022-12-13 16:32:06,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 452 transitions, 8433 flow. Second operand has 38 states, 38 states have (on average 107.42105263157895) internal successors, (4082), 38 states have internal predecessors, (4082), 0 states have call successors, (0), 0 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 16:32:06,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:06,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 312 [2022-12-13 16:32:06,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:13,078 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 16:32:23,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 16:32:25,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 16:32:27,989 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 [0, 1] [2022-12-13 16:32:29,545 INFO L130 PetriNetUnfolder]: 3201/5472 cut-off events. [2022-12-13 16:32:29,545 INFO L131 PetriNetUnfolder]: For 96496/96496 co-relation queries the response was YES. [2022-12-13 16:32:29,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42050 conditions, 5472 events. 3201/5472 cut-off events. For 96496/96496 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35579 event pairs, 140 based on Foata normal form. 44/5508 useless extension candidates. Maximal degree in co-relation 41945. Up to 1861 conditions per place. [2022-12-13 16:32:29,588 INFO L137 encePairwiseOnDemand]: 303/312 looper letters, 264 selfloop transitions, 483 changer transitions 11/758 dead transitions. [2022-12-13 16:32:29,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 758 transitions, 15011 flow [2022-12-13 16:32:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 16:32:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 16:32:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5739 transitions. [2022-12-13 16:32:29,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3537352071005917 [2022-12-13 16:32:29,593 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5739 transitions. [2022-12-13 16:32:29,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5739 transitions. [2022-12-13 16:32:29,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:29,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5739 transitions. [2022-12-13 16:32:29,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 110.36538461538461) internal successors, (5739), 52 states have internal predecessors, (5739), 0 states have call successors, (0), 0 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 16:32:29,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 312.0) internal successors, (16536), 53 states have internal predecessors, (16536), 0 states have call successors, (0), 0 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 16:32:29,604 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 312.0) internal successors, (16536), 53 states have internal predecessors, (16536), 0 states have call successors, (0), 0 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 16:32:29,604 INFO L175 Difference]: Start difference. First operand has 329 places, 452 transitions, 8433 flow. Second operand 52 states and 5739 transitions. [2022-12-13 16:32:29,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 758 transitions, 15011 flow [2022-12-13 16:32:30,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 758 transitions, 14668 flow, removed 63 selfloop flow, removed 14 redundant places. [2022-12-13 16:32:30,208 INFO L231 Difference]: Finished difference. Result has 382 places, 657 transitions, 14392 flow [2022-12-13 16:32:30,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=8152, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=14392, PETRI_PLACES=382, PETRI_TRANSITIONS=657} [2022-12-13 16:32:30,208 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 352 predicate places. [2022-12-13 16:32:30,209 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 657 transitions, 14392 flow [2022-12-13 16:32:30,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 107.42105263157895) internal successors, (4082), 38 states have internal predecessors, (4082), 0 states have call successors, (0), 0 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 16:32:30,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:30,209 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:30,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 16:32:30,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 16:32:30,410 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:32:30,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash 782991270, now seen corresponding path program 9 times [2022-12-13 16:32:30,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:30,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449045075] [2022-12-13 16:32:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:30,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449045075] [2022-12-13 16:32:30,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449045075] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299284249] [2022-12-13 16:32:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:32:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:30,696 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:30,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 16:32:30,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:32:30,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:32:30,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:32:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:31,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:32,093 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-12-13 16:32:32,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 319 treesize of output 217 [2022-12-13 16:32:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:32,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299284249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:32,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:32,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-12-13 16:32:32,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355600345] [2022-12-13 16:32:32,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:32,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:32:32,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:32,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:32:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:32:32,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 312 [2022-12-13 16:32:32,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 657 transitions, 14392 flow. Second operand has 32 states, 32 states have (on average 118.40625) internal successors, (3789), 32 states have internal predecessors, (3789), 0 states have call successors, (0), 0 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 16:32:32,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:32,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 312 [2022-12-13 16:32:32,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:32:35,269 INFO L130 PetriNetUnfolder]: 3601/6286 cut-off events. [2022-12-13 16:32:35,269 INFO L131 PetriNetUnfolder]: For 140831/140857 co-relation queries the response was YES. [2022-12-13 16:32:35,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51939 conditions, 6286 events. 3601/6286 cut-off events. For 140831/140857 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43752 event pairs, 1552 based on Foata normal form. 230/6484 useless extension candidates. Maximal degree in co-relation 51820. Up to 3900 conditions per place. [2022-12-13 16:32:35,327 INFO L137 encePairwiseOnDemand]: 306/312 looper letters, 743 selfloop transitions, 84 changer transitions 7/845 dead transitions. [2022-12-13 16:32:35,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 845 transitions, 20260 flow [2022-12-13 16:32:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:32:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:32:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2423 transitions. [2022-12-13 16:32:35,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38830128205128206 [2022-12-13 16:32:35,329 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2423 transitions. [2022-12-13 16:32:35,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2423 transitions. [2022-12-13 16:32:35,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:32:35,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2423 transitions. [2022-12-13 16:32:35,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 121.15) internal successors, (2423), 20 states have internal predecessors, (2423), 0 states have call successors, (0), 0 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 16:32:35,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 312.0) internal successors, (6552), 21 states have internal predecessors, (6552), 0 states have call successors, (0), 0 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 16:32:35,334 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 312.0) internal successors, (6552), 21 states have internal predecessors, (6552), 0 states have call successors, (0), 0 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 16:32:35,334 INFO L175 Difference]: Start difference. First operand has 382 places, 657 transitions, 14392 flow. Second operand 20 states and 2423 transitions. [2022-12-13 16:32:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 845 transitions, 20260 flow [2022-12-13 16:32:36,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 845 transitions, 16763 flow, removed 1636 selfloop flow, removed 17 redundant places. [2022-12-13 16:32:36,822 INFO L231 Difference]: Finished difference. Result has 388 places, 675 transitions, 12668 flow [2022-12-13 16:32:36,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=11533, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12668, PETRI_PLACES=388, PETRI_TRANSITIONS=675} [2022-12-13 16:32:36,823 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 358 predicate places. [2022-12-13 16:32:36,823 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 675 transitions, 12668 flow [2022-12-13 16:32:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 118.40625) internal successors, (3789), 32 states have internal predecessors, (3789), 0 states have call successors, (0), 0 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 16:32:36,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:36,824 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:36,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 16:32:37,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:32:37,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:32:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash 421398841, now seen corresponding path program 9 times [2022-12-13 16:32:37,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:37,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946550054] [2022-12-13 16:32:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:37,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:37,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946550054] [2022-12-13 16:32:37,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946550054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:37,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210706870] [2022-12-13 16:32:37,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:32:37,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:37,823 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:37,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 16:32:37,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:32:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:32:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 16:32:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:38,079 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 16:32:38,132 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 6 treesize of output 5 [2022-12-13 16:32:38,172 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 6 treesize of output 5 [2022-12-13 16:32:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:38,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:40,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:32:40,702 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 181 treesize of output 121 [2022-12-13 16:32:40,812 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-13 16:32:40,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 784 treesize of output 802 [2022-12-13 16:32:40,938 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-13 16:32:40,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 682 treesize of output 646 [2022-12-13 16:32:41,064 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-13 16:32:41,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 526 treesize of output 568 [2022-12-13 16:32:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:49,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210706870] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:49,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:49,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2022-12-13 16:32:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357529812] [2022-12-13 16:32:49,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:49,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 16:32:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 16:32:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1677, Unknown=1, NotChecked=0, Total=1980 [2022-12-13 16:32:55,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:32:55,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 675 transitions, 12668 flow. Second operand has 45 states, 45 states have (on average 81.2) internal successors, (3654), 45 states have internal predecessors, (3654), 0 states have call successors, (0), 0 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 16:32:55,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:55,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:32:55,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:05,948 INFO L130 PetriNetUnfolder]: 3685/6432 cut-off events. [2022-12-13 16:33:05,949 INFO L131 PetriNetUnfolder]: For 96262/96262 co-relation queries the response was YES. [2022-12-13 16:33:05,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44868 conditions, 6432 events. 3685/6432 cut-off events. For 96262/96262 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 44777 event pairs, 1824 based on Foata normal form. 36/6456 useless extension candidates. Maximal degree in co-relation 44749. Up to 5611 conditions per place. [2022-12-13 16:33:06,007 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 648 selfloop transitions, 92 changer transitions 16/756 dead transitions. [2022-12-13 16:33:06,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 756 transitions, 14860 flow [2022-12-13 16:33:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 16:33:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 16:33:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3103 transitions. [2022-12-13 16:33:06,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2687976437976438 [2022-12-13 16:33:06,011 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3103 transitions. [2022-12-13 16:33:06,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3103 transitions. [2022-12-13 16:33:06,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:06,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3103 transitions. [2022-12-13 16:33:06,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 83.86486486486487) internal successors, (3103), 37 states have internal predecessors, (3103), 0 states have call successors, (0), 0 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 16:33:06,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 312.0) internal successors, (11856), 38 states have internal predecessors, (11856), 0 states have call successors, (0), 0 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 16:33:06,018 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 312.0) internal successors, (11856), 38 states have internal predecessors, (11856), 0 states have call successors, (0), 0 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 16:33:06,018 INFO L175 Difference]: Start difference. First operand has 388 places, 675 transitions, 12668 flow. Second operand 37 states and 3103 transitions. [2022-12-13 16:33:06,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 756 transitions, 14860 flow [2022-12-13 16:33:06,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 756 transitions, 14512 flow, removed 141 selfloop flow, removed 15 redundant places. [2022-12-13 16:33:06,952 INFO L231 Difference]: Finished difference. Result has 415 places, 675 transitions, 12717 flow [2022-12-13 16:33:06,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=12326, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=12717, PETRI_PLACES=415, PETRI_TRANSITIONS=675} [2022-12-13 16:33:06,953 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2022-12-13 16:33:06,953 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 675 transitions, 12717 flow [2022-12-13 16:33:06,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 81.2) internal successors, (3654), 45 states have internal predecessors, (3654), 0 states have call successors, (0), 0 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 16:33:06,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:06,953 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:06,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 16:33:07,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:07,154 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:33:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1706750478, now seen corresponding path program 10 times [2022-12-13 16:33:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:07,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256316129] [2022-12-13 16:33:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:07,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:33:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256316129] [2022-12-13 16:33:09,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256316129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965849742] [2022-12-13 16:33:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:33:09,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:09,950 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:09,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 16:33:10,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:33:10,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:33:10,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:33:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:33:10,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:11,698 INFO L321 Elim1Store]: treesize reduction 26, result has 62.3 percent of original size [2022-12-13 16:33:11,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 277 treesize of output 244 [2022-12-13 16:33:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:33:12,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965849742] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:33:12,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:33:12,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 36 [2022-12-13 16:33:12,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522704006] [2022-12-13 16:33:12,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:12,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 16:33:12,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:12,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 16:33:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 16:33:19,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 312 [2022-12-13 16:33:19,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 675 transitions, 12717 flow. Second operand has 38 states, 38 states have (on average 101.42105263157895) internal successors, (3854), 38 states have internal predecessors, (3854), 0 states have call successors, (0), 0 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 16:33:19,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:19,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 312 [2022-12-13 16:33:19,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:26,099 INFO L130 PetriNetUnfolder]: 4031/6986 cut-off events. [2022-12-13 16:33:26,099 INFO L131 PetriNetUnfolder]: For 109122/109122 co-relation queries the response was YES. [2022-12-13 16:33:26,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49555 conditions, 6986 events. 4031/6986 cut-off events. For 109122/109122 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 48440 event pairs, 186 based on Foata normal form. 72/7046 useless extension candidates. Maximal degree in co-relation 49430. Up to 1821 conditions per place. [2022-12-13 16:33:26,215 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 352 selfloop transitions, 485 changer transitions 15/852 dead transitions. [2022-12-13 16:33:26,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 852 transitions, 17087 flow [2022-12-13 16:33:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 16:33:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 16:33:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3861 transitions. [2022-12-13 16:33:26,218 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3344594594594595 [2022-12-13 16:33:26,218 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3861 transitions. [2022-12-13 16:33:26,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3861 transitions. [2022-12-13 16:33:26,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:26,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3861 transitions. [2022-12-13 16:33:26,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 104.35135135135135) internal successors, (3861), 37 states have internal predecessors, (3861), 0 states have call successors, (0), 0 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 16:33:26,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 312.0) internal successors, (11856), 38 states have internal predecessors, (11856), 0 states have call successors, (0), 0 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 16:33:26,226 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 312.0) internal successors, (11856), 38 states have internal predecessors, (11856), 0 states have call successors, (0), 0 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 16:33:26,226 INFO L175 Difference]: Start difference. First operand has 415 places, 675 transitions, 12717 flow. Second operand 37 states and 3861 transitions. [2022-12-13 16:33:26,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 852 transitions, 17087 flow [2022-12-13 16:33:27,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 852 transitions, 16618 flow, removed 177 selfloop flow, removed 27 redundant places. [2022-12-13 16:33:27,314 INFO L231 Difference]: Finished difference. Result has 428 places, 749 transitions, 15428 flow [2022-12-13 16:33:27,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=12255, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=15428, PETRI_PLACES=428, PETRI_TRANSITIONS=749} [2022-12-13 16:33:27,315 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 398 predicate places. [2022-12-13 16:33:27,315 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 749 transitions, 15428 flow [2022-12-13 16:33:27,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 101.42105263157895) internal successors, (3854), 38 states have internal predecessors, (3854), 0 states have call successors, (0), 0 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 16:33:27,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:27,316 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:27,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 16:33:27,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 16:33:27,517 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:33:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1706750480, now seen corresponding path program 10 times [2022-12-13 16:33:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:27,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928253749] [2022-12-13 16:33:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:33:28,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:28,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928253749] [2022-12-13 16:33:28,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928253749] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:28,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799628285] [2022-12-13 16:33:28,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:33:28,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:28,461 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:28,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 16:33:28,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:33:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:33:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:33:28,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:33:29,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:30,119 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-12-13 16:33:30,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 296 treesize of output 286 [2022-12-13 16:33:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:33:31,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799628285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:33:31,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:33:31,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 34 [2022-12-13 16:33:31,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572484962] [2022-12-13 16:33:31,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:31,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 16:33:31,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 16:33:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 16:33:33,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 312 [2022-12-13 16:33:33,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 749 transitions, 15428 flow. Second operand has 36 states, 36 states have (on average 108.44444444444444) internal successors, (3904), 36 states have internal predecessors, (3904), 0 states have call successors, (0), 0 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 16:33:33,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:33,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 312 [2022-12-13 16:33:33,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:40,066 INFO L130 PetriNetUnfolder]: 4709/8172 cut-off events. [2022-12-13 16:33:40,066 INFO L131 PetriNetUnfolder]: For 163579/163579 co-relation queries the response was YES. [2022-12-13 16:33:40,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62516 conditions, 8172 events. 4709/8172 cut-off events. For 163579/163579 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 58478 event pairs, 90 based on Foata normal form. 144/8304 useless extension candidates. Maximal degree in co-relation 62387. Up to 2305 conditions per place. [2022-12-13 16:33:40,152 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 367 selfloop transitions, 622 changer transitions 28/1017 dead transitions. [2022-12-13 16:33:40,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1017 transitions, 22326 flow [2022-12-13 16:33:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 16:33:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 16:33:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5211 transitions. [2022-12-13 16:33:40,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35536006546644844 [2022-12-13 16:33:40,156 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5211 transitions. [2022-12-13 16:33:40,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5211 transitions. [2022-12-13 16:33:40,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:40,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5211 transitions. [2022-12-13 16:33:40,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 110.87234042553192) internal successors, (5211), 47 states have internal predecessors, (5211), 0 states have call successors, (0), 0 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 16:33:40,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 312.0) internal successors, (14976), 48 states have internal predecessors, (14976), 0 states have call successors, (0), 0 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 16:33:40,166 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 312.0) internal successors, (14976), 48 states have internal predecessors, (14976), 0 states have call successors, (0), 0 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 16:33:40,166 INFO L175 Difference]: Start difference. First operand has 428 places, 749 transitions, 15428 flow. Second operand 47 states and 5211 transitions. [2022-12-13 16:33:40,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1017 transitions, 22326 flow [2022-12-13 16:33:42,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1017 transitions, 21386 flow, removed 430 selfloop flow, removed 17 redundant places. [2022-12-13 16:33:42,048 INFO L231 Difference]: Finished difference. Result has 466 places, 869 transitions, 19565 flow [2022-12-13 16:33:42,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=14423, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=19565, PETRI_PLACES=466, PETRI_TRANSITIONS=869} [2022-12-13 16:33:42,048 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 436 predicate places. [2022-12-13 16:33:42,048 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 869 transitions, 19565 flow [2022-12-13 16:33:42,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 108.44444444444444) internal successors, (3904), 36 states have internal predecessors, (3904), 0 states have call successors, (0), 0 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 16:33:42,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:42,049 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:42,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 16:33:42,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:42,250 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:33:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash 8998528, now seen corresponding path program 11 times [2022-12-13 16:33:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:42,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237033595] [2022-12-13 16:33:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:42,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:33:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:44,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237033595] [2022-12-13 16:33:44,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237033595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:44,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465057745] [2022-12-13 16:33:44,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:33:44,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:44,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:44,203 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:44,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 16:33:44,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:33:44,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:33:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:33:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:33:44,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:45,874 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-12-13 16:33:45,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 297 treesize of output 287 [2022-12-13 16:33:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:33:46,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465057745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:33:46,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:33:46,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 38 [2022-12-13 16:33:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621231201] [2022-12-13 16:33:46,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 16:33:46,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 16:33:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 16:33:50,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 312 [2022-12-13 16:33:50,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 869 transitions, 19565 flow. Second operand has 40 states, 40 states have (on average 102.35) internal successors, (4094), 40 states have internal predecessors, (4094), 0 states have call successors, (0), 0 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 16:33:50,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:50,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 312 [2022-12-13 16:33:50,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:57,857 INFO L130 PetriNetUnfolder]: 4855/8418 cut-off events. [2022-12-13 16:33:57,857 INFO L131 PetriNetUnfolder]: For 196001/196001 co-relation queries the response was YES. [2022-12-13 16:33:57,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69402 conditions, 8418 events. 4855/8418 cut-off events. For 196001/196001 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 60015 event pairs, 254 based on Foata normal form. 72/8478 useless extension candidates. Maximal degree in co-relation 69266. Up to 3199 conditions per place. [2022-12-13 16:33:57,963 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 549 selfloop transitions, 533 changer transitions 11/1093 dead transitions. [2022-12-13 16:33:57,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1093 transitions, 24952 flow [2022-12-13 16:33:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 16:33:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-13 16:33:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5771 transitions. [2022-12-13 16:33:57,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3363053613053613 [2022-12-13 16:33:57,971 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5771 transitions. [2022-12-13 16:33:57,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5771 transitions. [2022-12-13 16:33:57,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:57,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5771 transitions. [2022-12-13 16:33:57,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 104.92727272727272) internal successors, (5771), 55 states have internal predecessors, (5771), 0 states have call successors, (0), 0 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 16:33:57,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 312.0) internal successors, (17472), 56 states have internal predecessors, (17472), 0 states have call successors, (0), 0 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 16:33:57,990 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 312.0) internal successors, (17472), 56 states have internal predecessors, (17472), 0 states have call successors, (0), 0 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 16:33:57,990 INFO L175 Difference]: Start difference. First operand has 466 places, 869 transitions, 19565 flow. Second operand 55 states and 5771 transitions. [2022-12-13 16:33:57,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1093 transitions, 24952 flow [2022-12-13 16:34:00,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1093 transitions, 23670 flow, removed 504 selfloop flow, removed 33 redundant places. [2022-12-13 16:34:00,770 INFO L231 Difference]: Finished difference. Result has 488 places, 928 transitions, 21370 flow [2022-12-13 16:34:00,770 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=18209, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=21370, PETRI_PLACES=488, PETRI_TRANSITIONS=928} [2022-12-13 16:34:00,771 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 458 predicate places. [2022-12-13 16:34:00,771 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 928 transitions, 21370 flow [2022-12-13 16:34:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 102.35) internal successors, (4094), 40 states have internal predecessors, (4094), 0 states have call successors, (0), 0 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 16:34:00,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:00,771 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:00,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 16:34:00,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:00,973 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:34:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1591399564, now seen corresponding path program 12 times [2022-12-13 16:34:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:00,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652305562] [2022-12-13 16:34:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:00,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:01,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:01,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652305562] [2022-12-13 16:34:01,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652305562] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:01,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721813946] [2022-12-13 16:34:01,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:34:01,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:01,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:01,592 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:01,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 16:34:01,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:34:01,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:34:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:34:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:34:02,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:34:02,736 INFO L321 Elim1Store]: treesize reduction 26, result has 62.3 percent of original size [2022-12-13 16:34:02,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 283 treesize of output 250 [2022-12-13 16:34:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:34:03,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721813946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:34:03,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:34:03,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 29 [2022-12-13 16:34:03,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210616285] [2022-12-13 16:34:03,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:34:03,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:34:03,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:34:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-12-13 16:34:04,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 312 [2022-12-13 16:34:04,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 928 transitions, 21370 flow. Second operand has 31 states, 31 states have (on average 111.74193548387096) internal successors, (3464), 31 states have internal predecessors, (3464), 0 states have call successors, (0), 0 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 16:34:04,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:04,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 312 [2022-12-13 16:34:04,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:10,385 INFO L130 PetriNetUnfolder]: 6577/11260 cut-off events. [2022-12-13 16:34:10,385 INFO L131 PetriNetUnfolder]: For 274901/274901 co-relation queries the response was YES. [2022-12-13 16:34:10,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94614 conditions, 11260 events. 6577/11260 cut-off events. For 274901/274901 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 83679 event pairs, 757 based on Foata normal form. 60/11320 useless extension candidates. Maximal degree in co-relation 94476. Up to 5369 conditions per place. [2022-12-13 16:34:10,570 INFO L137 encePairwiseOnDemand]: 304/312 looper letters, 663 selfloop transitions, 696 changer transitions 6/1365 dead transitions. [2022-12-13 16:34:10,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1365 transitions, 33722 flow [2022-12-13 16:34:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 16:34:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 16:34:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3213 transitions. [2022-12-13 16:34:10,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36778846153846156 [2022-12-13 16:34:10,573 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3213 transitions. [2022-12-13 16:34:10,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3213 transitions. [2022-12-13 16:34:10,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:10,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3213 transitions. [2022-12-13 16:34:10,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 114.75) internal successors, (3213), 28 states have internal predecessors, (3213), 0 states have call successors, (0), 0 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 16:34:10,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 312.0) internal successors, (9048), 29 states have internal predecessors, (9048), 0 states have call successors, (0), 0 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 16:34:10,580 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 312.0) internal successors, (9048), 29 states have internal predecessors, (9048), 0 states have call successors, (0), 0 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 16:34:10,580 INFO L175 Difference]: Start difference. First operand has 488 places, 928 transitions, 21370 flow. Second operand 28 states and 3213 transitions. [2022-12-13 16:34:10,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1365 transitions, 33722 flow [2022-12-13 16:34:14,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1365 transitions, 32744 flow, removed 305 selfloop flow, removed 31 redundant places. [2022-12-13 16:34:14,829 INFO L231 Difference]: Finished difference. Result has 491 places, 1251 transitions, 31276 flow [2022-12-13 16:34:14,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=20665, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=31276, PETRI_PLACES=491, PETRI_TRANSITIONS=1251} [2022-12-13 16:34:14,830 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 461 predicate places. [2022-12-13 16:34:14,830 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1251 transitions, 31276 flow [2022-12-13 16:34:14,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 111.74193548387096) internal successors, (3464), 31 states have internal predecessors, (3464), 0 states have call successors, (0), 0 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 16:34:14,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:14,831 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:14,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 16:34:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 16:34:15,032 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:34:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:15,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1508282676, now seen corresponding path program 11 times [2022-12-13 16:34:15,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:15,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404926965] [2022-12-13 16:34:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:15,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404926965] [2022-12-13 16:34:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404926965] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034834034] [2022-12-13 16:34:16,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:34:16,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:16,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:16,067 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 16:34:16,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:34:16,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:34:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:34:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:34:16,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:34:17,421 INFO L321 Elim1Store]: treesize reduction 40, result has 72.8 percent of original size [2022-12-13 16:34:17,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 306 treesize of output 320 [2022-12-13 16:34:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:34:18,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034834034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:34:18,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:34:18,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 32 [2022-12-13 16:34:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781477234] [2022-12-13 16:34:18,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:34:18,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 16:34:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 16:34:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 16:34:21,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 312 [2022-12-13 16:34:21,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1251 transitions, 31276 flow. Second operand has 34 states, 34 states have (on average 107.52941176470588) internal successors, (3656), 34 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 16:34:21,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:21,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 312 [2022-12-13 16:34:21,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:29,574 INFO L130 PetriNetUnfolder]: 7141/12244 cut-off events. [2022-12-13 16:34:29,575 INFO L131 PetriNetUnfolder]: For 331641/331641 co-relation queries the response was YES. [2022-12-13 16:34:29,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107705 conditions, 12244 events. 7141/12244 cut-off events. For 331641/331641 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 92370 event pairs, 232 based on Foata normal form. 132/12376 useless extension candidates. Maximal degree in co-relation 107564. Up to 3725 conditions per place. [2022-12-13 16:34:29,719 INFO L137 encePairwiseOnDemand]: 303/312 looper letters, 553 selfloop transitions, 916 changer transitions 10/1479 dead transitions. [2022-12-13 16:34:29,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1479 transitions, 38213 flow [2022-12-13 16:34:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 16:34:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-13 16:34:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 5068 transitions. [2022-12-13 16:34:29,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35312151616499443 [2022-12-13 16:34:29,724 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 5068 transitions. [2022-12-13 16:34:29,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 5068 transitions. [2022-12-13 16:34:29,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:29,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 5068 transitions. [2022-12-13 16:34:29,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 110.17391304347827) internal successors, (5068), 46 states have internal predecessors, (5068), 0 states have call successors, (0), 0 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 16:34:29,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 312.0) internal successors, (14664), 47 states have internal predecessors, (14664), 0 states have call successors, (0), 0 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 16:34:29,735 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 312.0) internal successors, (14664), 47 states have internal predecessors, (14664), 0 states have call successors, (0), 0 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 16:34:29,736 INFO L175 Difference]: Start difference. First operand has 491 places, 1251 transitions, 31276 flow. Second operand 46 states and 5068 transitions. [2022-12-13 16:34:29,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1479 transitions, 38213 flow [2022-12-13 16:34:34,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1479 transitions, 36912 flow, removed 533 selfloop flow, removed 18 redundant places. [2022-12-13 16:34:34,940 INFO L231 Difference]: Finished difference. Result has 527 places, 1348 transitions, 34915 flow [2022-12-13 16:34:34,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=29408, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=34915, PETRI_PLACES=527, PETRI_TRANSITIONS=1348} [2022-12-13 16:34:34,941 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 497 predicate places. [2022-12-13 16:34:34,941 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1348 transitions, 34915 flow [2022-12-13 16:34:34,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 107.52941176470588) internal successors, (3656), 34 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 16:34:34,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:34,942 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:34,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-13 16:34:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 16:34:35,143 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:34:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash 11679716, now seen corresponding path program 12 times [2022-12-13 16:34:35,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:35,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906864414] [2022-12-13 16:34:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:35,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:36,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:36,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906864414] [2022-12-13 16:34:36,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906864414] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196410676] [2022-12-13 16:34:36,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:34:36,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:36,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:36,573 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:36,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 16:34:36,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:34:36,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:34:36,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:34:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:34:37,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:34:38,150 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-12-13 16:34:38,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 296 treesize of output 286 [2022-12-13 16:34:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:34:39,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196410676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:34:39,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:34:39,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 37 [2022-12-13 16:34:39,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072217704] [2022-12-13 16:34:39,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:34:39,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 16:34:39,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 16:34:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 16:34:41,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 312 [2022-12-13 16:34:41,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1348 transitions, 34915 flow. Second operand has 39 states, 39 states have (on average 102.38461538461539) internal successors, (3993), 39 states have internal predecessors, (3993), 0 states have call successors, (0), 0 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 16:34:41,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:41,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 312 [2022-12-13 16:34:41,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:50,206 INFO L130 PetriNetUnfolder]: 7761/13288 cut-off events. [2022-12-13 16:34:50,206 INFO L131 PetriNetUnfolder]: For 386682/386682 co-relation queries the response was YES. [2022-12-13 16:34:50,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122154 conditions, 13288 events. 7761/13288 cut-off events. For 386682/386682 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 101228 event pairs, 335 based on Foata normal form. 52/13340 useless extension candidates. Maximal degree in co-relation 122006. Up to 5151 conditions per place. [2022-12-13 16:34:50,434 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 698 selfloop transitions, 858 changer transitions 10/1566 dead transitions. [2022-12-13 16:34:50,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1566 transitions, 42355 flow [2022-12-13 16:34:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 16:34:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 16:34:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4096 transitions. [2022-12-13 16:34:50,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.336620644312952 [2022-12-13 16:34:50,438 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4096 transitions. [2022-12-13 16:34:50,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4096 transitions. [2022-12-13 16:34:50,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:50,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4096 transitions. [2022-12-13 16:34:50,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 105.02564102564102) internal successors, (4096), 39 states have internal predecessors, (4096), 0 states have call successors, (0), 0 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 16:34:50,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 312.0) internal successors, (12480), 40 states have internal predecessors, (12480), 0 states have call successors, (0), 0 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 16:34:50,447 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 312.0) internal successors, (12480), 40 states have internal predecessors, (12480), 0 states have call successors, (0), 0 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 16:34:50,447 INFO L175 Difference]: Start difference. First operand has 527 places, 1348 transitions, 34915 flow. Second operand 39 states and 4096 transitions. [2022-12-13 16:34:50,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1566 transitions, 42355 flow [2022-12-13 16:34:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1566 transitions, 41260 flow, removed 378 selfloop flow, removed 23 redundant places. [2022-12-13 16:34:57,620 INFO L231 Difference]: Finished difference. Result has 549 places, 1436 transitions, 38601 flow [2022-12-13 16:34:57,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=33865, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=38601, PETRI_PLACES=549, PETRI_TRANSITIONS=1436} [2022-12-13 16:34:57,621 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 519 predicate places. [2022-12-13 16:34:57,621 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 1436 transitions, 38601 flow [2022-12-13 16:34:57,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 102.38461538461539) internal successors, (3993), 39 states have internal predecessors, (3993), 0 states have call successors, (0), 0 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 16:34:57,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:57,621 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:57,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 16:34:57,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:57,822 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:34:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1706663990, now seen corresponding path program 13 times [2022-12-13 16:34:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:57,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048599961] [2022-12-13 16:34:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:57,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:35:00,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:00,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048599961] [2022-12-13 16:35:00,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048599961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:00,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325004969] [2022-12-13 16:35:00,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:35:00,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:00,532 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:00,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 16:35:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:00,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 16:35:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:35:01,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:35:02,677 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-12-13 16:35:02,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 296 treesize of output 286 [2022-12-13 16:35:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:35:03,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325004969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:35:03,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:35:03,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 38 [2022-12-13 16:35:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549142004] [2022-12-13 16:35:03,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:35:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 16:35:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:35:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 16:35:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 16:35:10,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 312 [2022-12-13 16:35:10,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 1436 transitions, 38601 flow. Second operand has 40 states, 40 states have (on average 101.325) internal successors, (4053), 40 states have internal predecessors, (4053), 0 states have call successors, (0), 0 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 16:35:10,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:35:10,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 312 [2022-12-13 16:35:10,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:35:22,661 INFO L130 PetriNetUnfolder]: 8503/14526 cut-off events. [2022-12-13 16:35:22,661 INFO L131 PetriNetUnfolder]: For 484539/484539 co-relation queries the response was YES. [2022-12-13 16:35:22,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138521 conditions, 14526 events. 8503/14526 cut-off events. For 484539/484539 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 111134 event pairs, 457 based on Foata normal form. 56/14582 useless extension candidates. Maximal degree in co-relation 138368. Up to 5667 conditions per place. [2022-12-13 16:35:22,848 INFO L137 encePairwiseOnDemand]: 302/312 looper letters, 811 selfloop transitions, 911 changer transitions 15/1737 dead transitions. [2022-12-13 16:35:22,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 1737 transitions, 48609 flow [2022-12-13 16:35:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 16:35:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 16:35:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4168 transitions. [2022-12-13 16:35:22,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33397435897435895 [2022-12-13 16:35:22,852 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4168 transitions. [2022-12-13 16:35:22,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4168 transitions. [2022-12-13 16:35:22,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:35:22,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4168 transitions. [2022-12-13 16:35:22,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 104.2) internal successors, (4168), 40 states have internal predecessors, (4168), 0 states have call successors, (0), 0 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 16:35:22,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 312.0) internal successors, (12792), 41 states have internal predecessors, (12792), 0 states have call successors, (0), 0 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 16:35:22,861 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 312.0) internal successors, (12792), 41 states have internal predecessors, (12792), 0 states have call successors, (0), 0 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 16:35:22,861 INFO L175 Difference]: Start difference. First operand has 549 places, 1436 transitions, 38601 flow. Second operand 40 states and 4168 transitions. [2022-12-13 16:35:22,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 1737 transitions, 48609 flow [2022-12-13 16:35:31,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1737 transitions, 47467 flow, removed 169 selfloop flow, removed 21 redundant places. [2022-12-13 16:35:31,049 INFO L231 Difference]: Finished difference. Result has 573 places, 1564 transitions, 44396 flow [2022-12-13 16:35:31,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=37418, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=783, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=44396, PETRI_PLACES=573, PETRI_TRANSITIONS=1564} [2022-12-13 16:35:31,050 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 543 predicate places. [2022-12-13 16:35:31,050 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 1564 transitions, 44396 flow [2022-12-13 16:35:31,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 101.325) internal successors, (4053), 40 states have internal predecessors, (4053), 0 states have call successors, (0), 0 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 16:35:31,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:35:31,051 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:35:31,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 16:35:31,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 16:35:31,251 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:35:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:35:31,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1679072869, now seen corresponding path program 13 times [2022-12-13 16:35:31,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:35:31,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617576016] [2022-12-13 16:35:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:31,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:35:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:35:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:31,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617576016] [2022-12-13 16:35:31,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617576016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:31,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856779994] [2022-12-13 16:35:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:35:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:31,482 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:31,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 16:35:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:35:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:35:32,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:35:32,762 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-13 16:35:32,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 291 treesize of output 207 [2022-12-13 16:35:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:35:32,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856779994] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:35:32,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:35:32,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-12-13 16:35:32,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123207363] [2022-12-13 16:35:32,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:35:32,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:35:32,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:35:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:35:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:35:33,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 312 [2022-12-13 16:35:33,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1564 transitions, 44396 flow. Second operand has 25 states, 25 states have (on average 118.76) internal successors, (2969), 25 states have internal predecessors, (2969), 0 states have call successors, (0), 0 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 16:35:33,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:35:33,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 312 [2022-12-13 16:35:33,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:35:40,950 INFO L130 PetriNetUnfolder]: 8337/14242 cut-off events. [2022-12-13 16:35:40,950 INFO L131 PetriNetUnfolder]: For 531153/531185 co-relation queries the response was YES. [2022-12-13 16:35:41,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140896 conditions, 14242 events. 8337/14242 cut-off events. For 531153/531185 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 108719 event pairs, 4616 based on Foata normal form. 6/14212 useless extension candidates. Maximal degree in co-relation 140737. Up to 13694 conditions per place. [2022-12-13 16:35:41,125 INFO L137 encePairwiseOnDemand]: 307/312 looper letters, 1523 selfloop transitions, 17 changer transitions 8/1560 dead transitions. [2022-12-13 16:35:41,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1560 transitions, 47229 flow [2022-12-13 16:35:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:35:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 16:35:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1330 transitions. [2022-12-13 16:35:41,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38752913752913754 [2022-12-13 16:35:41,127 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1330 transitions. [2022-12-13 16:35:41,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1330 transitions. [2022-12-13 16:35:41,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:35:41,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1330 transitions. [2022-12-13 16:35:41,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.9090909090909) internal successors, (1330), 11 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 16:35:41,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 312.0) internal successors, (3744), 12 states have internal predecessors, (3744), 0 states have call successors, (0), 0 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 16:35:41,129 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 312.0) internal successors, (3744), 12 states have internal predecessors, (3744), 0 states have call successors, (0), 0 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 16:35:41,129 INFO L175 Difference]: Start difference. First operand has 573 places, 1564 transitions, 44396 flow. Second operand 11 states and 1330 transitions. [2022-12-13 16:35:41,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1560 transitions, 47229 flow [2022-12-13 16:35:50,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 1560 transitions, 46493 flow, removed 277 selfloop flow, removed 26 redundant places. [2022-12-13 16:35:50,833 INFO L231 Difference]: Finished difference. Result has 548 places, 1540 transitions, 43101 flow [2022-12-13 16:35:50,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=43185, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=43101, PETRI_PLACES=548, PETRI_TRANSITIONS=1540} [2022-12-13 16:35:50,834 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 518 predicate places. [2022-12-13 16:35:50,834 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1540 transitions, 43101 flow [2022-12-13 16:35:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 118.76) internal successors, (2969), 25 states have internal predecessors, (2969), 0 states have call successors, (0), 0 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 16:35:50,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:35:50,834 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:35:50,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 16:35:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 16:35:51,035 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:35:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:35:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1921925338, now seen corresponding path program 14 times [2022-12-13 16:35:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:35:51,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236971063] [2022-12-13 16:35:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:51,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:35:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:35:53,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:53,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236971063] [2022-12-13 16:35:53,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236971063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:53,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18365222] [2022-12-13 16:35:53,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:35:53,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:53,109 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 16:35:53,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:35:53,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:35:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 16:35:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:53,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:35:53,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:53,540 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 16:35:53,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:53,602 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 16:35:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:35:54,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:35:56,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:35:56,543 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 244 treesize of output 160 [2022-12-13 16:35:56,743 INFO L321 Elim1Store]: treesize reduction 84, result has 74.2 percent of original size [2022-12-13 16:35:56,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 511 treesize of output 673 [2022-12-13 16:35:56,870 INFO L321 Elim1Store]: treesize reduction 84, result has 61.3 percent of original size [2022-12-13 16:35:56,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 428 treesize of output 452 [2022-12-13 16:35:56,987 INFO L321 Elim1Store]: treesize reduction 84, result has 61.3 percent of original size [2022-12-13 16:35:56,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 287 treesize of output 365 [2022-12-13 16:36:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:36:30,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18365222] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:36:30,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:36:30,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-12-13 16:36:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080170197] [2022-12-13 16:36:30,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:36:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 16:36:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:36:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 16:36:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=2521, Unknown=1, NotChecked=0, Total=3080 [2022-12-13 16:36:31,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:36:31,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1540 transitions, 43101 flow. Second operand has 56 states, 56 states have (on average 81.17857142857143) internal successors, (4546), 56 states have internal predecessors, (4546), 0 states have call successors, (0), 0 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 16:36:31,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:36:31,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:36:31,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:26,012 INFO L130 PetriNetUnfolder]: 9085/15520 cut-off events. [2022-12-13 16:37:26,012 INFO L131 PetriNetUnfolder]: For 544929/544929 co-relation queries the response was YES. [2022-12-13 16:37:26,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150480 conditions, 15520 events. 9085/15520 cut-off events. For 544929/544929 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 119896 event pairs, 1371 based on Foata normal form. 28/15548 useless extension candidates. Maximal degree in co-relation 150327. Up to 11494 conditions per place. [2022-12-13 16:37:26,336 INFO L137 encePairwiseOnDemand]: 301/312 looper letters, 1549 selfloop transitions, 554 changer transitions 17/2120 dead transitions. [2022-12-13 16:37:26,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 2120 transitions, 55851 flow [2022-12-13 16:37:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-13 16:37:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2022-12-13 16:37:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 12829 transitions. [2022-12-13 16:37:26,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.268748952572482 [2022-12-13 16:37:26,346 INFO L72 ComplementDD]: Start complementDD. Operand 153 states and 12829 transitions. [2022-12-13 16:37:26,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 153 states and 12829 transitions. [2022-12-13 16:37:26,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:26,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 153 states and 12829 transitions. [2022-12-13 16:37:26,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 154 states, 153 states have (on average 83.84967320261438) internal successors, (12829), 153 states have internal predecessors, (12829), 0 states have call successors, (0), 0 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 16:37:26,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 154 states, 154 states have (on average 312.0) internal successors, (48048), 154 states have internal predecessors, (48048), 0 states have call successors, (0), 0 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 16:37:26,378 INFO L81 ComplementDD]: Finished complementDD. Result has 154 states, 154 states have (on average 312.0) internal successors, (48048), 154 states have internal predecessors, (48048), 0 states have call successors, (0), 0 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 16:37:26,378 INFO L175 Difference]: Start difference. First operand has 548 places, 1540 transitions, 43101 flow. Second operand 153 states and 12829 transitions. [2022-12-13 16:37:26,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 2120 transitions, 55851 flow [2022-12-13 16:37:35,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 2120 transitions, 55762 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-12-13 16:37:35,529 INFO L231 Difference]: Finished difference. Result has 733 places, 1810 transitions, 52594 flow [2022-12-13 16:37:35,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=43022, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=153, PETRI_FLOW=52594, PETRI_PLACES=733, PETRI_TRANSITIONS=1810} [2022-12-13 16:37:35,530 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 703 predicate places. [2022-12-13 16:37:35,531 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 1810 transitions, 52594 flow [2022-12-13 16:37:35,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 81.17857142857143) internal successors, (4546), 56 states have internal predecessors, (4546), 0 states have call successors, (0), 0 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 16:37:35,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:35,531 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:35,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-13 16:37:35,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 16:37:35,732 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:37:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash 57661912, now seen corresponding path program 14 times [2022-12-13 16:37:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:35,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719100338] [2022-12-13 16:37:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:35,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 16:37:35,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719100338] [2022-12-13 16:37:35,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719100338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968900433] [2022-12-13 16:37:35,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:37:35,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:35,913 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:35,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 16:37:36,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:37:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:37:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:37:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:36,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:37:36,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 180 [2022-12-13 16:37:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:37:36,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:36,896 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-12-13 16:37:36,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 273 treesize of output 207 [2022-12-13 16:37:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:37:36,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968900433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:36,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:36,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-12-13 16:37:36,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304781496] [2022-12-13 16:37:36,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:36,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:37:36,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:36,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:37:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:37:37,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 312 [2022-12-13 16:37:37,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 1810 transitions, 52594 flow. Second operand has 18 states, 18 states have (on average 119.38888888888889) internal successors, (2149), 18 states have internal predecessors, (2149), 0 states have call successors, (0), 0 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 16:37:37,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:37,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 312 [2022-12-13 16:37:37,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:48,242 INFO L130 PetriNetUnfolder]: 10059/17166 cut-off events. [2022-12-13 16:37:48,242 INFO L131 PetriNetUnfolder]: For 627979/627979 co-relation queries the response was YES. [2022-12-13 16:37:48,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173292 conditions, 17166 events. 10059/17166 cut-off events. For 627979/627979 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 133535 event pairs, 1332 based on Foata normal form. 252/17418 useless extension candidates. Maximal degree in co-relation 173090. Up to 9807 conditions per place. [2022-12-13 16:37:48,536 INFO L137 encePairwiseOnDemand]: 305/312 looper letters, 1181 selfloop transitions, 704 changer transitions 144/2029 dead transitions. [2022-12-13 16:37:48,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 2029 transitions, 61897 flow [2022-12-13 16:37:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:37:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:37:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2448 transitions. [2022-12-13 16:37:48,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2022-12-13 16:37:48,539 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2448 transitions. [2022-12-13 16:37:48,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2448 transitions. [2022-12-13 16:37:48,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:48,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2448 transitions. [2022-12-13 16:37:48,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 122.4) internal successors, (2448), 20 states have internal predecessors, (2448), 0 states have call successors, (0), 0 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 16:37:48,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 312.0) internal successors, (6552), 21 states have internal predecessors, (6552), 0 states have call successors, (0), 0 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 16:37:48,544 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 312.0) internal successors, (6552), 21 states have internal predecessors, (6552), 0 states have call successors, (0), 0 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 16:37:48,544 INFO L175 Difference]: Start difference. First operand has 733 places, 1810 transitions, 52594 flow. Second operand 20 states and 2448 transitions. [2022-12-13 16:37:48,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 2029 transitions, 61897 flow [2022-12-13 16:38:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 2029 transitions, 59197 flow, removed 1254 selfloop flow, removed 44 redundant places. [2022-12-13 16:38:00,954 INFO L231 Difference]: Finished difference. Result has 695 places, 1801 transitions, 53260 flow [2022-12-13 16:38:00,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=47005, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=53260, PETRI_PLACES=695, PETRI_TRANSITIONS=1801} [2022-12-13 16:38:00,955 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 665 predicate places. [2022-12-13 16:38:00,955 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 1801 transitions, 53260 flow [2022-12-13 16:38:00,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 119.38888888888889) internal successors, (2149), 18 states have internal predecessors, (2149), 0 states have call successors, (0), 0 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 16:38:00,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:00,956 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:38:00,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 16:38:01,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 16:38:01,157 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:38:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1787516976, now seen corresponding path program 15 times [2022-12-13 16:38:01,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:01,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809195173] [2022-12-13 16:38:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:01,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:01,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:38:01,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809195173] [2022-12-13 16:38:01,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809195173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:38:01,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300547491] [2022-12-13 16:38:01,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:38:01,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:01,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:38:01,823 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:38:01,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 16:38:02,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 16:38:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:38:02,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 16:38:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:38:02,226 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 16:38:02,252 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 6 treesize of output 5 [2022-12-13 16:38:02,278 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 6 treesize of output 5 [2022-12-13 16:38:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:38:05,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:38:21,242 WARN L233 SmtUtils]: Spent 12.24s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:38:21,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:38:21,332 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 182 treesize of output 122 [2022-12-13 16:38:21,386 INFO L321 Elim1Store]: treesize reduction 44, result has 61.7 percent of original size [2022-12-13 16:38:21,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 405 treesize of output 426 [2022-12-13 16:38:21,428 INFO L321 Elim1Store]: treesize reduction 76, result has 33.9 percent of original size [2022-12-13 16:38:21,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 356 treesize of output 320 [2022-12-13 16:38:21,471 INFO L321 Elim1Store]: treesize reduction 76, result has 33.9 percent of original size [2022-12-13 16:38:21,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 236 treesize of output 237 [2022-12-13 16:38:22,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:38:22,648 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 180 treesize of output 120 [2022-12-13 16:38:22,731 INFO L321 Elim1Store]: treesize reduction 60, result has 47.8 percent of original size [2022-12-13 16:38:22,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 397 treesize of output 402 [2022-12-13 16:38:22,788 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 16:38:22,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 348 treesize of output 310 [2022-12-13 16:38:22,853 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 16:38:22,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 228 treesize of output 227 [2022-12-13 16:38:24,757 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 16:38:24,758 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 182 treesize of output 1 [2022-12-13 16:38:24,775 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 16:38:24,776 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 180 treesize of output 1 [2022-12-13 16:38:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:38:25,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300547491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:38:25,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:38:25,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-12-13 16:38:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128017783] [2022-12-13 16:38:25,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:38:25,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 16:38:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 16:38:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1586, Unknown=9, NotChecked=0, Total=1892 [2022-12-13 16:38:28,626 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 16:38:31,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:38:33,588 WARN L539 Checker$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 16:38:35,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:38:35,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1801 transitions, 53260 flow. Second operand has 44 states, 44 states have (on average 81.5) internal successors, (3586), 44 states have internal predecessors, (3586), 0 states have call successors, (0), 0 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 16:38:35,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:35,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:38:35,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:43,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 16:38:44,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 16:38:57,265 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 154 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:39:06,075 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 138 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:39:14,964 INFO L130 PetriNetUnfolder]: 9567/16225 cut-off events. [2022-12-13 16:39:14,964 INFO L131 PetriNetUnfolder]: For 605822/605822 co-relation queries the response was YES. [2022-12-13 16:39:15,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167116 conditions, 16225 events. 9567/16225 cut-off events. For 605822/605822 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 124889 event pairs, 4678 based on Foata normal form. 20/16224 useless extension candidates. Maximal degree in co-relation 166917. Up to 14393 conditions per place. [2022-12-13 16:39:15,255 INFO L137 encePairwiseOnDemand]: 303/312 looper letters, 1674 selfloop transitions, 192 changer transitions 15/1881 dead transitions. [2022-12-13 16:39:15,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 1881 transitions, 57301 flow [2022-12-13 16:39:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 16:39:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 16:39:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3677 transitions. [2022-12-13 16:39:15,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2678467365967366 [2022-12-13 16:39:15,259 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3677 transitions. [2022-12-13 16:39:15,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3677 transitions. [2022-12-13 16:39:15,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:39:15,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3677 transitions. [2022-12-13 16:39:15,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 83.56818181818181) internal successors, (3677), 44 states have internal predecessors, (3677), 0 states have call successors, (0), 0 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 16:39:15,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 312.0) internal successors, (14040), 45 states have internal predecessors, (14040), 0 states have call successors, (0), 0 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 16:39:15,268 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 312.0) internal successors, (14040), 45 states have internal predecessors, (14040), 0 states have call successors, (0), 0 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 16:39:15,268 INFO L175 Difference]: Start difference. First operand has 695 places, 1801 transitions, 53260 flow. Second operand 44 states and 3677 transitions. [2022-12-13 16:39:15,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 1881 transitions, 57301 flow [2022-12-13 16:39:26,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1881 transitions, 53952 flow, removed 1432 selfloop flow, removed 34 redundant places. [2022-12-13 16:39:26,800 INFO L231 Difference]: Finished difference. Result has 628 places, 1801 transitions, 50429 flow [2022-12-13 16:39:26,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=49863, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=50429, PETRI_PLACES=628, PETRI_TRANSITIONS=1801} [2022-12-13 16:39:26,801 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 598 predicate places. [2022-12-13 16:39:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 1801 transitions, 50429 flow [2022-12-13 16:39:26,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 81.5) internal successors, (3586), 44 states have internal predecessors, (3586), 0 states have call successors, (0), 0 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 16:39:26,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:39:26,801 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:39:26,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-13 16:39:27,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:39:27,002 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-12-13 16:39:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:39:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1534969704, now seen corresponding path program 15 times [2022-12-13 16:39:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:39:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826553009] [2022-12-13 16:39:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:39:27,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:39:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:39:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:39:28,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:39:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826553009] [2022-12-13 16:39:28,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826553009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:39:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16956382] [2022-12-13 16:39:28,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:39:28,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:39:28,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:39:28,499 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:39:28,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ee14af8-45b7-470a-8eb0-57b26aeedd59/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 16:39:28,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:39:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:39:28,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-13 16:39:28,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:39:28,910 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 16 treesize of output 12 [2022-12-13 16:39:28,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 16:39:29,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 16:39:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:39:29,075 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 16:39:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:39:29,125 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 16:39:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:39:30,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:39:33,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:39:33,263 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 3 case distinctions, treesize of input 464 treesize of output 222 [2022-12-13 16:39:33,503 INFO L321 Elim1Store]: treesize reduction 135, result has 58.5 percent of original size [2022-12-13 16:39:33,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1296 treesize of output 1301 [2022-12-13 16:39:33,612 INFO L321 Elim1Store]: treesize reduction 160, result has 26.3 percent of original size [2022-12-13 16:39:33,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1107 treesize of output 891 [2022-12-13 16:39:33,700 INFO L321 Elim1Store]: treesize reduction 160, result has 26.3 percent of original size [2022-12-13 16:39:33,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 835 treesize of output 755 [2022-12-13 16:39:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:39:42,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16956382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:39:42,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:39:42,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 55 [2022-12-13 16:39:42,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94073603] [2022-12-13 16:39:42,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:39:42,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 16:39:42,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:39:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 16:39:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=2671, Unknown=7, NotChecked=0, Total=3192 [2022-12-13 16:39:44,049 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 312 [2022-12-13 16:39:44,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 1801 transitions, 50429 flow. Second operand has 57 states, 57 states have (on average 81.15789473684211) internal successors, (4626), 57 states have internal predecessors, (4626), 0 states have call successors, (0), 0 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 16:39:44,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:39:44,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 312 [2022-12-13 16:39:44,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:39:53,249 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 158 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:39:56,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:39:58,169 WARN L539 Checker$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 16:40:11,091 WARN L233 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 166 DAG size of output: 134 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:40:24,687 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 201 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)