./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/test-easy7.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/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_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/test-easy7.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 --- 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 16:26:27,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:26:27,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:26:27,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:26:27,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:26:27,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:26:27,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:26:27,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:26:27,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:26:27,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:26:27,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:26:27,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:26:27,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:26:27,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:26:27,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:26:27,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:26:27,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:26:27,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:26:27,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:26:27,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:26:27,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:26:27,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:26:27,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:26:27,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:26:27,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:26:27,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:26:27,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:26:27,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:26:27,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:26:27,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:26:27,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:26:27,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:26:27,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:26:27,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:26:27,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:26:27,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:26:27,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:26:27,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:26:27,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:26:27,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:26:27,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:26:27,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:26:27,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:26:27,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:26:27,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:26:27,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:26:27,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:26:27,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:26:27,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:26:27,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:26:27,280 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:26:27,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:26:27,280 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:26:27,281 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:26:27,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:26:27,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:26:27,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:26:27,281 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:26:27,282 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:26:27,282 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:26:27,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:26:27,282 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:26:27,282 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:26:27,282 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:26:27,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:26:27,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:26:27,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:26:27,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:26:27,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:26:27,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:26:27,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:26:27,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:26:27,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:26:27,284 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:26:27,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:26:27,284 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:26:27,284 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_920abad9-2f88-46a4-a19a-94b0381b34cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 [2022-12-13 16:26:27,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:26:27,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:26:27,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:26:27,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:26:27,487 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:26:27,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/test-easy7.wvr.c [2022-12-13 16:26:30,046 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:26:30,212 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:26:30,212 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/sv-benchmarks/c/weaver/test-easy7.wvr.c [2022-12-13 16:26:30,216 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/data/b3acd7bd5/e94e295ac8f04e43910f00be172f3879/FLAGb0349daed [2022-12-13 16:26:30,615 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/data/b3acd7bd5/e94e295ac8f04e43910f00be172f3879 [2022-12-13 16:26:30,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:26:30,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:26:30,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:26:30,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:26:30,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:26:30,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2f79af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30, skipping insertion in model container [2022-12-13 16:26:30,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:26:30,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:26:30,751 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_920abad9-2f88-46a4-a19a-94b0381b34cd/sv-benchmarks/c/weaver/test-easy7.wvr.c[1872,1885] [2022-12-13 16:26:30,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:26:30,761 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:26:30,774 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_920abad9-2f88-46a4-a19a-94b0381b34cd/sv-benchmarks/c/weaver/test-easy7.wvr.c[1872,1885] [2022-12-13 16:26:30,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:26:30,785 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:26:30,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30 WrapperNode [2022-12-13 16:26:30,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:26:30,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:26:30,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:26:30,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:26:30,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,810 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2022-12-13 16:26:30,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:26:30,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:26:30,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:26:30,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:26:30,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,825 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:26:30,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:26:30,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:26:30,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:26:30,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (1/1) ... [2022-12-13 16:26:30,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:26:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:30,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:26:30,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:26:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:26:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:26:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:26:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:26:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:26:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:26:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:26:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:26:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:26:30,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:26:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:26:30,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:26:30,891 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 16:26:30,968 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:26:30,969 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:26:31,138 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:26:31,146 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:26:31,147 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 16:26:31,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:26:31 BoogieIcfgContainer [2022-12-13 16:26:31,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:26:31,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:26:31,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:26:31,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:26:31,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:26:30" (1/3) ... [2022-12-13 16:26:31,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cc07aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:26:31, skipping insertion in model container [2022-12-13 16:26:31,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:26:30" (2/3) ... [2022-12-13 16:26:31,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cc07aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:26:31, skipping insertion in model container [2022-12-13 16:26:31,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:26:31" (3/3) ... [2022-12-13 16:26:31,158 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy7.wvr.c [2022-12-13 16:26:31,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:26:31,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 16:26:31,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:26:31,252 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:26:31,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 106 transitions, 228 flow [2022-12-13 16:26:31,349 INFO L130 PetriNetUnfolder]: 2/104 cut-off events. [2022-12-13 16:26:31,361 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:26:31,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 104 events. 2/104 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-12-13 16:26:31,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 106 transitions, 228 flow [2022-12-13 16:26:31,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 99 transitions, 210 flow [2022-12-13 16:26:31,372 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:26:31,380 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 99 transitions, 210 flow [2022-12-13 16:26:31,383 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 99 transitions, 210 flow [2022-12-13 16:26:31,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 99 transitions, 210 flow [2022-12-13 16:26:31,404 INFO L130 PetriNetUnfolder]: 2/99 cut-off events. [2022-12-13 16:26:31,404 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:26:31,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 2/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-12-13 16:26:31,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 1036 [2022-12-13 16:26:33,407 INFO L134 LiptonReduction]: Checked pairs total: 957 [2022-12-13 16:26:33,407 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-12-13 16:26:33,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:26:33,423 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6d58b406, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:26:33,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 16:26:33,424 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 16:26:33,424 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:26:33,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:33,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 16:26:33,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 16:26:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash 381, now seen corresponding path program 1 times [2022-12-13 16:26:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:33,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685261119] [2022-12-13 16:26:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:33,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:33,501 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 16:26:33,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:33,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685261119] [2022-12-13 16:26:33,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685261119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:33,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:33,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 16:26:33,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702091753] [2022-12-13 16:26:33,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:33,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 16:26:33,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 16:26:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:26:33,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 205 [2022-12-13 16:26:33,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 52 flow. Second operand has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:33,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 205 [2022-12-13 16:26:33,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:33,564 INFO L130 PetriNetUnfolder]: 21/56 cut-off events. [2022-12-13 16:26:33,564 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 16:26:33,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 56 events. 21/56 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 84. Up to 57 conditions per place. [2022-12-13 16:26:33,566 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 17 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2022-12-13 16:26:33,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 80 flow [2022-12-13 16:26:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 16:26:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 16:26:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-12-13 16:26:33,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2022-12-13 16:26:33,578 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-12-13 16:26:33,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-12-13 16:26:33,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:33,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-12-13 16:26:33,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,589 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,591 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 2 states and 218 transitions. [2022-12-13 16:26:33,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 80 flow [2022-12-13 16:26:33,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 16:26:33,595 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 38 flow [2022-12-13 16:26:33,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2022-12-13 16:26:33,600 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2022-12-13 16:26:33,600 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 38 flow [2022-12-13 16:26:33,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:33,600 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:26:33,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:26:33,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 16:26:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 372202, now seen corresponding path program 1 times [2022-12-13 16:26:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114319903] [2022-12-13 16:26:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:33,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:33,762 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 16:26:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114319903] [2022-12-13 16:26:33,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114319903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:33,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:33,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:26:33,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923646664] [2022-12-13 16:26:33,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:33,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:26:33,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:26:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:26:33,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 205 [2022-12-13 16:26:33,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:33,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 205 [2022-12-13 16:26:33,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:33,828 INFO L130 PetriNetUnfolder]: 19/50 cut-off events. [2022-12-13 16:26:33,828 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:26:33,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 50 events. 19/50 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 99 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 103. Up to 50 conditions per place. [2022-12-13 16:26:33,829 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 16:26:33,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 64 flow [2022-12-13 16:26:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:26:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:26:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2022-12-13 16:26:33,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4861788617886179 [2022-12-13 16:26:33,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2022-12-13 16:26:33,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2022-12-13 16:26:33,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:33,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2022-12-13 16:26:33,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,837 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 38 flow. Second operand 3 states and 299 transitions. [2022-12-13 16:26:33,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 64 flow [2022-12-13 16:26:33,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:26:33,838 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 36 flow [2022-12-13 16:26:33,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2022-12-13 16:26:33,839 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2022-12-13 16:26:33,839 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 36 flow [2022-12-13 16:26:33,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:33,839 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:26:33,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:26:33,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 16:26:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 372201, now seen corresponding path program 1 times [2022-12-13 16:26:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:33,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524674116] [2022-12-13 16:26:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:33,900 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 16:26:33,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:33,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524674116] [2022-12-13 16:26:33,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524674116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:33,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:33,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:26:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72282355] [2022-12-13 16:26:33,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:33,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:26:33,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:26:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:26:33,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2022-12-13 16:26:33,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:33,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2022-12-13 16:26:33,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:33,958 INFO L130 PetriNetUnfolder]: 17/44 cut-off events. [2022-12-13 16:26:33,958 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:26:33,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 44 events. 17/44 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 84 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 92. Up to 44 conditions per place. [2022-12-13 16:26:33,959 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2022-12-13 16:26:33,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 58 flow [2022-12-13 16:26:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:26:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:26:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2022-12-13 16:26:33,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2022-12-13 16:26:33,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2022-12-13 16:26:33,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2022-12-13 16:26:33,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:33,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2022-12-13 16:26:33,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,965 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 36 flow. Second operand 3 states and 285 transitions. [2022-12-13 16:26:33,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 58 flow [2022-12-13 16:26:33,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:26:33,966 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 33 flow [2022-12-13 16:26:33,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2022-12-13 16:26:33,967 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-12-13 16:26:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 33 flow [2022-12-13 16:26:33,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:33,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:33,968 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:26:33,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:26:33,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 16:26:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash 357692233, now seen corresponding path program 1 times [2022-12-13 16:26:33,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:33,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998742010] [2022-12-13 16:26:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:34,089 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 16:26:34,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:34,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998742010] [2022-12-13 16:26:34,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998742010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:34,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:34,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:26:34,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200947336] [2022-12-13 16:26:34,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:26:34,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:26:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:26:34,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 205 [2022-12-13 16:26:34,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 33 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:34,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 205 [2022-12-13 16:26:34,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:34,156 INFO L130 PetriNetUnfolder]: 13/36 cut-off events. [2022-12-13 16:26:34,156 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:26:34,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 36 events. 13/36 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 58 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 77. Up to 36 conditions per place. [2022-12-13 16:26:34,157 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2022-12-13 16:26:34,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 55 flow [2022-12-13 16:26:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:26:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:26:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2022-12-13 16:26:34,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46991869918699186 [2022-12-13 16:26:34,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2022-12-13 16:26:34,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2022-12-13 16:26:34,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:34,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2022-12-13 16:26:34,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,163 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 33 flow. Second operand 3 states and 289 transitions. [2022-12-13 16:26:34,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 55 flow [2022-12-13 16:26:34,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:26:34,163 INFO L231 Difference]: Finished difference. Result has 20 places, 12 transitions, 32 flow [2022-12-13 16:26:34,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=20, PETRI_TRANSITIONS=12} [2022-12-13 16:26:34,164 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-12-13 16:26:34,164 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions, 32 flow [2022-12-13 16:26:34,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:34,165 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:26:34,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:26:34,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 16:26:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash 357692232, now seen corresponding path program 1 times [2022-12-13 16:26:34,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:34,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168349821] [2022-12-13 16:26:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:34,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:34,217 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 16:26:34,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168349821] [2022-12-13 16:26:34,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168349821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:34,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:34,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:26:34,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425505999] [2022-12-13 16:26:34,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:34,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:26:34,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:34,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:26:34,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:26:34,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2022-12-13 16:26:34,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 12 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:34,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2022-12-13 16:26:34,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:34,286 INFO L130 PetriNetUnfolder]: 9/28 cut-off events. [2022-12-13 16:26:34,286 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:26:34,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 28 events. 9/28 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 62. Up to 28 conditions per place. [2022-12-13 16:26:34,287 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 10 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2022-12-13 16:26:34,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 11 transitions, 52 flow [2022-12-13 16:26:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:26:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:26:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2022-12-13 16:26:34,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2022-12-13 16:26:34,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2022-12-13 16:26:34,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2022-12-13 16:26:34,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:34,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2022-12-13 16:26:34,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,290 INFO L175 Difference]: Start difference. First operand has 20 places, 12 transitions, 32 flow. Second operand 3 states and 270 transitions. [2022-12-13 16:26:34,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 11 transitions, 52 flow [2022-12-13 16:26:34,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 51 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:26:34,291 INFO L231 Difference]: Finished difference. Result has 20 places, 11 transitions, 31 flow [2022-12-13 16:26:34,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2022-12-13 16:26:34,291 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2022-12-13 16:26:34,291 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 31 flow [2022-12-13 16:26:34,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:34,292 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:34,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:26:34,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 16:26:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1256576477, now seen corresponding path program 1 times [2022-12-13 16:26:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089569571] [2022-12-13 16:26:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:34,485 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 16:26:34,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:34,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089569571] [2022-12-13 16:26:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089569571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:34,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:34,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:26:34,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387832154] [2022-12-13 16:26:34,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:26:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:26:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:26:34,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2022-12-13 16:26:34,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:34,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2022-12-13 16:26:34,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:34,609 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2022-12-13 16:26:34,609 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:26:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 32 events. 8/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 1 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 71. Up to 13 conditions per place. [2022-12-13 16:26:34,609 INFO L137 encePairwiseOnDemand]: 201/205 looper letters, 10 selfloop transitions, 2 changer transitions 10/22 dead transitions. [2022-12-13 16:26:34,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 101 flow [2022-12-13 16:26:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:26:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:26:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2022-12-13 16:26:34,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4524390243902439 [2022-12-13 16:26:34,611 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2022-12-13 16:26:34,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2022-12-13 16:26:34,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:34,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2022-12-13 16:26:34,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,613 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,613 INFO L175 Difference]: Start difference. First operand has 20 places, 11 transitions, 31 flow. Second operand 4 states and 371 transitions. [2022-12-13 16:26:34,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 101 flow [2022-12-13 16:26:34,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 22 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:26:34,614 INFO L231 Difference]: Finished difference. Result has 23 places, 11 transitions, 40 flow [2022-12-13 16:26:34,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=40, PETRI_PLACES=23, PETRI_TRANSITIONS=11} [2022-12-13 16:26:34,615 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -4 predicate places. [2022-12-13 16:26:34,615 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 11 transitions, 40 flow [2022-12-13 16:26:34,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:34,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:26:34,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 16:26:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1575681119, now seen corresponding path program 2 times [2022-12-13 16:26:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:34,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975804452] [2022-12-13 16:26:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:34,801 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 16:26:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:34,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975804452] [2022-12-13 16:26:34,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975804452] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:26:34,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:26:34,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:26:34,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151877614] [2022-12-13 16:26:34,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:26:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:26:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:26:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:26:34,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2022-12-13 16:26:34,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 11 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:34,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2022-12-13 16:26:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:34,906 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 16:26:34,907 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:26:34,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 14 events. 2/14 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 1 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 41. Up to 11 conditions per place. [2022-12-13 16:26:34,907 INFO L137 encePairwiseOnDemand]: 201/205 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2022-12-13 16:26:34,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 11 transitions, 60 flow [2022-12-13 16:26:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:26:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:26:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2022-12-13 16:26:34,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2022-12-13 16:26:34,909 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2022-12-13 16:26:34,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2022-12-13 16:26:34,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:34,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2022-12-13 16:26:34,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,913 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,913 INFO L175 Difference]: Start difference. First operand has 23 places, 11 transitions, 40 flow. Second operand 4 states and 360 transitions. [2022-12-13 16:26:34,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 11 transitions, 60 flow [2022-12-13 16:26:34,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 11 transitions, 54 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:26:34,913 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2022-12-13 16:26:34,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2022-12-13 16:26:34,914 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2022-12-13 16:26:34,914 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2022-12-13 16:26:34,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:26:34,918 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2022-12-13 16:26:34,918 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2022-12-13 16:26:34,918 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2022-12-13 16:26:34,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2022-12-13 16:26:34,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2022-12-13 16:26:34,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2022-12-13 16:26:34,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2022-12-13 16:26:34,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2022-12-13 16:26:34,920 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2022-12-13 16:26:34,920 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2022-12-13 16:26:34,920 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2022-12-13 16:26:34,920 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2022-12-13 16:26:34,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:26:34,920 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-12-13 16:26:34,924 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 16:26:34,924 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 16:26:34,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 04:26:34 BasicIcfg [2022-12-13 16:26:34,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 16:26:34,928 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 16:26:34,928 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 16:26:34,928 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 16:26:34,928 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:26:31" (3/4) ... [2022-12-13 16:26:34,930 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 16:26:34,935 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-12-13 16:26:34,935 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-12-13 16:26:34,937 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-12-13 16:26:34,938 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 16:26:34,938 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 16:26:34,938 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 16:26:34,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 16:26:34,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 16:26:34,960 INFO L158 Benchmark]: Toolchain (without parser) took 4342.17ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 85.2MB in the beginning and 63.5MB in the end (delta: 21.7MB). Peak memory consumption was 51.7MB. Max. memory is 16.1GB. [2022-12-13 16:26:34,961 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 115.3MB. Free memory was 92.2MB in the beginning and 92.1MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 16:26:34,961 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.91ms. Allocated memory is still 115.3MB. Free memory was 84.9MB in the beginning and 74.3MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 16:26:34,961 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.67ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 72.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:26:34,961 INFO L158 Benchmark]: Boogie Preprocessor took 16.19ms. Allocated memory is still 115.3MB. Free memory was 72.5MB in the beginning and 71.5MB in the end (delta: 960.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:26:34,962 INFO L158 Benchmark]: RCFGBuilder took 321.62ms. Allocated memory is still 115.3MB. Free memory was 71.5MB in the beginning and 57.9MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 16:26:34,962 INFO L158 Benchmark]: TraceAbstraction took 3775.74ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 57.6MB in the beginning and 65.6MB in the end (delta: -8.0MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2022-12-13 16:26:34,962 INFO L158 Benchmark]: Witness Printer took 32.54ms. Allocated memory is still 142.6MB. Free memory was 65.6MB in the beginning and 63.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:26:34,964 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 115.3MB. Free memory was 92.2MB in the beginning and 92.1MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 165.91ms. Allocated memory is still 115.3MB. Free memory was 84.9MB in the beginning and 74.3MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.67ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 72.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.19ms. Allocated memory is still 115.3MB. Free memory was 72.5MB in the beginning and 71.5MB in the end (delta: 960.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 321.62ms. Allocated memory is still 115.3MB. Free memory was 71.5MB in the beginning and 57.9MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3775.74ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 57.6MB in the beginning and 65.6MB in the end (delta: -8.0MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. * Witness Printer took 32.54ms. Allocated memory is still 142.6MB. Free memory was 65.6MB in the beginning and 63.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 104 PlacesBefore, 27 PlacesAfterwards, 99 TransitionsBefore, 20 TransitionsAfterwards, 1036 CoEnabledTransitionPairs, 8 FixpointIterations, 52 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 99 TotalNumberOfCompositions, 957 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 957, independent: 957, independent conditional: 0, independent unconditional: 957, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 562, independent: 562, independent conditional: 0, independent unconditional: 562, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 957, independent: 395, independent conditional: 0, independent unconditional: 395, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 562, unknown conditional: 0, unknown unconditional: 562] , Statistics on independence cache: Total cache size (in pairs): 15, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 72]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 58]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 137 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.6s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 406 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 199 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 442 IncrementalHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 19 mSDtfsCounter, 442 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 641 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 16:26:34,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920abad9-2f88-46a4-a19a-94b0381b34cd/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE