./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R --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 ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:44:27,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:44:27,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:44:27,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:44:27,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:44:27,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:44:27,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:44:27,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:44:27,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:44:27,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:44:27,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:44:27,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:44:27,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:44:27,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:44:27,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:44:27,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:44:27,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:44:27,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:44:27,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:44:27,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:44:27,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:44:27,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:44:27,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:44:27,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:44:27,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:44:27,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:44:27,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:44:27,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:44:27,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:44:27,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:44:27,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:44:27,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:44:27,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:44:27,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:44:27,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:44:27,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:44:27,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:44:27,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:44:27,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:44:27,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:44:27,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:44:27,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:44:27,290 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:44:27,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:44:27,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:44:27,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:44:27,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:44:27,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:44:27,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:44:27,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:44:27,295 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:44:27,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:44:27,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:44:27,297 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:44:27,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:44:27,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:44:27,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:44:27,298 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:44:27,298 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:44:27,298 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:44:27,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:44:27,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:44:27,299 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:44:27,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:44:27,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:44:27,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:44:27,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:44:27,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:44:27,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:44:27,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:44:27,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:44:27,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:44:27,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:44:27,303 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:44:27,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:44:27,303 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_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 [2022-11-25 17:44:27,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:44:27,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:44:27,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:44:27,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:44:27,679 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:44:27,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2022-11-25 17:44:31,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:44:31,596 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:44:31,597 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2022-11-25 17:44:31,612 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/data/63018b684/2939ca13b8f04fea95f60a7783e4814d/FLAGa87a14565 [2022-11-25 17:44:31,631 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/data/63018b684/2939ca13b8f04fea95f60a7783e4814d [2022-11-25 17:44:31,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:44:31,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:44:31,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:44:31,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:44:31,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:44:31,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:44:31" (1/1) ... [2022-11-25 17:44:31,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12eb4805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:31, skipping insertion in model container [2022-11-25 17:44:31,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:44:31" (1/1) ... [2022-11-25 17:44:31,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:44:31,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:44:32,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:44:32,567 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:44:32,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:44:32,751 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:44:32,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32 WrapperNode [2022-11-25 17:44:32,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:44:32,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:44:32,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:44:32,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:44:32,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,846 INFO L138 Inliner]: procedures = 262, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-11-25 17:44:32,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:44:32,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:44:32,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:44:32,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:44:32,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,910 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:44:32,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:44:32,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:44:32,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:44:32,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (1/1) ... [2022-11-25 17:44:32,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:44:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:32,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:44:32,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:44:33,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:44:33,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:44:33,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:44:33,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:44:33,049 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:44:33,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:44:33,051 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:44:33,052 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:44:33,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:44:33,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:44:33,062 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:44:33,222 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:44:33,225 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:44:33,651 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:44:33,659 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:44:33,660 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:44:33,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:44:33 BoogieIcfgContainer [2022-11-25 17:44:33,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:44:33,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:44:33,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:44:33,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:44:33,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:44:31" (1/3) ... [2022-11-25 17:44:33,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3155cbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:44:33, skipping insertion in model container [2022-11-25 17:44:33,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:32" (2/3) ... [2022-11-25 17:44:33,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3155cbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:44:33, skipping insertion in model container [2022-11-25 17:44:33,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:44:33" (3/3) ... [2022-11-25 17:44:33,677 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2022-11-25 17:44:33,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:44:33,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-25 17:44:33,705 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:44:33,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:44:33,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 92 transitions, 189 flow [2022-11-25 17:44:34,008 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2022-11-25 17:44:34,013 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:44:34,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 91 events. 6/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 159 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-11-25 17:44:34,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 92 transitions, 189 flow [2022-11-25 17:44:34,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 91 transitions, 185 flow [2022-11-25 17:44:34,039 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:44:34,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 91 transitions, 185 flow [2022-11-25 17:44:34,062 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 91 transitions, 185 flow [2022-11-25 17:44:34,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 91 transitions, 185 flow [2022-11-25 17:44:34,090 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2022-11-25 17:44:34,090 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:44:34,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 91 events. 6/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 159 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-11-25 17:44:34,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2022-11-25 17:44:37,653 INFO L134 LiptonReduction]: Checked pairs total: 2707 [2022-11-25 17:44:37,654 INFO L136 LiptonReduction]: Total number of compositions: 93 [2022-11-25 17:44:37,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:44:37,701 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;@15486ac1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:44:37,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-25 17:44:37,706 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:44:37,707 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:44:37,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:37,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:44:37,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 11492, now seen corresponding path program 1 times [2022-11-25 17:44:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930221511] [2022-11-25 17:44:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:37,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930221511] [2022-11-25 17:44:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930221511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:37,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:37,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:44:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108616859] [2022-11-25 17:44:37,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:37,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:44:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:44:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:44:38,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 185 [2022-11-25 17:44:38,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:38,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 185 [2022-11-25 17:44:38,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:38,112 INFO L130 PetriNetUnfolder]: 74/155 cut-off events. [2022-11-25 17:44:38,113 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:44:38,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 155 events. 74/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 583 event pairs, 56 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 295. Up to 149 conditions per place. [2022-11-25 17:44:38,116 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2022-11-25 17:44:38,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 89 flow [2022-11-25 17:44:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:44:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:44:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-11-25 17:44:38,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5459459459459459 [2022-11-25 17:44:38,143 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-11-25 17:44:38,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-11-25 17:44:38,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:38,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-11-25 17:44:38,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,167 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,169 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 57 flow. Second operand 2 states and 202 transitions. [2022-11-25 17:44:38,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 89 flow [2022-11-25 17:44:38,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:38,174 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 46 flow [2022-11-25 17:44:38,177 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2022-11-25 17:44:38,183 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2022-11-25 17:44:38,183 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 46 flow [2022-11-25 17:44:38,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:38,184 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:44:38,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:44:38,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:38,186 INFO L85 PathProgramCache]: Analyzing trace with hash 342540966, now seen corresponding path program 1 times [2022-11-25 17:44:38,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:38,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27790355] [2022-11-25 17:44:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:38,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:38,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:38,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27790355] [2022-11-25 17:44:38,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27790355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:38,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:38,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:44:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719169057] [2022-11-25 17:44:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:44:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:44:38,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:44:38,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2022-11-25 17:44:38,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:38,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2022-11-25 17:44:38,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:38,452 INFO L130 PetriNetUnfolder]: 74/156 cut-off events. [2022-11-25 17:44:38,453 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:44:38,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 156 events. 74/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 578 event pairs, 56 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 307. Up to 149 conditions per place. [2022-11-25 17:44:38,455 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-11-25 17:44:38,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 92 flow [2022-11-25 17:44:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:44:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:44:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2022-11-25 17:44:38,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2022-11-25 17:44:38,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2022-11-25 17:44:38,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2022-11-25 17:44:38,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:38,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2022-11-25 17:44:38,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,464 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 46 flow. Second operand 3 states and 275 transitions. [2022-11-25 17:44:38,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 92 flow [2022-11-25 17:44:38,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:44:38,465 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 58 flow [2022-11-25 17:44:38,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2022-11-25 17:44:38,467 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2022-11-25 17:44:38,467 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 58 flow [2022-11-25 17:44:38,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:38,468 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:44:38,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:44:38,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2019389331, now seen corresponding path program 1 times [2022-11-25 17:44:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:38,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185602940] [2022-11-25 17:44:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:38,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:38,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185602940] [2022-11-25 17:44:38,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185602940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:38,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525798990] [2022-11-25 17:44:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:38,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:38,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:38,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:38,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:44:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:44:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:38,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:38,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525798990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:38,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:38,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:44:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398941635] [2022-11-25 17:44:38,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:38,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:44:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:44:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:44:38,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 185 [2022-11-25 17:44:38,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:38,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 185 [2022-11-25 17:44:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:38,953 INFO L130 PetriNetUnfolder]: 74/159 cut-off events. [2022-11-25 17:44:38,961 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:44:38,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 159 events. 74/159 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 582 event pairs, 56 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 321. Up to 149 conditions per place. [2022-11-25 17:44:38,964 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2022-11-25 17:44:38,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 120 flow [2022-11-25 17:44:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:44:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:44:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2022-11-25 17:44:38,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47387387387387386 [2022-11-25 17:44:38,984 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2022-11-25 17:44:38,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2022-11-25 17:44:38,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:38,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2022-11-25 17:44:38,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,992 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,993 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 6 states and 526 transitions. [2022-11-25 17:44:38,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 120 flow [2022-11-25 17:44:38,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:38,995 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2022-11-25 17:44:38,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2022-11-25 17:44:38,996 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2022-11-25 17:44:38,996 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2022-11-25 17:44:38,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:39,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:39,011 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 17:44:39,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:44:39,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:39,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:39,213 INFO L85 PathProgramCache]: Analyzing trace with hash -769321498, now seen corresponding path program 2 times [2022-11-25 17:44:39,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:39,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900702442] [2022-11-25 17:44:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:39,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:39,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900702442] [2022-11-25 17:44:39,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900702442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:39,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097790182] [2022-11-25 17:44:39,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:44:39,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:39,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:44:39,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:44:39,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:39,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:44:39,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:39,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:44:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:44:39,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:44:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097790182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:39,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:44:39,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-11-25 17:44:39,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035525985] [2022-11-25 17:44:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:39,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:44:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:39,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:44:39,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:44:40,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 185 [2022-11-25 17:44:40,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:40,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 185 [2022-11-25 17:44:40,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:40,185 INFO L130 PetriNetUnfolder]: 119/260 cut-off events. [2022-11-25 17:44:40,186 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:44:40,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 260 events. 119/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1061 event pairs, 56 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 522. Up to 152 conditions per place. [2022-11-25 17:44:40,192 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2022-11-25 17:44:40,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 196 flow [2022-11-25 17:44:40,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:44:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:44:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2022-11-25 17:44:40,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49324324324324326 [2022-11-25 17:44:40,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 365 transitions. [2022-11-25 17:44:40,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 365 transitions. [2022-11-25 17:44:40,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:40,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 365 transitions. [2022-11-25 17:44:40,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,207 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,207 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 4 states and 365 transitions. [2022-11-25 17:44:40,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 196 flow [2022-11-25 17:44:40,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 182 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:40,211 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 92 flow [2022-11-25 17:44:40,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2022-11-25 17:44:40,214 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2022-11-25 17:44:40,214 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 92 flow [2022-11-25 17:44:40,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:40,215 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 17:44:40,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:40,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash -769321821, now seen corresponding path program 1 times [2022-11-25 17:44:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:40,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761313306] [2022-11-25 17:44:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:40,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:44:40,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:40,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761313306] [2022-11-25 17:44:40,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761313306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:40,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:40,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:44:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276668711] [2022-11-25 17:44:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:40,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:44:40,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:44:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:44:40,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 185 [2022-11-25 17:44:40,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:40,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 185 [2022-11-25 17:44:40,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:40,684 INFO L130 PetriNetUnfolder]: 197/402 cut-off events. [2022-11-25 17:44:40,684 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-11-25 17:44:40,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 402 events. 197/402 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1737 event pairs, 96 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 904. Up to 243 conditions per place. [2022-11-25 17:44:40,694 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 39 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-25 17:44:40,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 216 flow [2022-11-25 17:44:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:44:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:44:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2022-11-25 17:44:40,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5153153153153153 [2022-11-25 17:44:40,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2022-11-25 17:44:40,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2022-11-25 17:44:40,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:40,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2022-11-25 17:44:40,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,702 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 92 flow. Second operand 3 states and 286 transitions. [2022-11-25 17:44:40,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 216 flow [2022-11-25 17:44:40,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:40,707 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 102 flow [2022-11-25 17:44:40,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2022-11-25 17:44:40,710 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2022-11-25 17:44:40,710 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 102 flow [2022-11-25 17:44:40,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:40,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:40,712 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 17:44:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:44:40,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash -769321814, now seen corresponding path program 1 times [2022-11-25 17:44:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:40,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668623615] [2022-11-25 17:44:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668623615] [2022-11-25 17:44:40,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668623615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:40,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173011375] [2022-11-25 17:44:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:40,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:40,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:40,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:44:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:40,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:44:40,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:41,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:41,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173011375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:41,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:41,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:44:41,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470618409] [2022-11-25 17:44:41,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:41,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:44:41,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:41,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:44:41,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:44:41,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 185 [2022-11-25 17:44:41,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 84.3076923076923) internal successors, (1096), 13 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:41,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:41,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 185 [2022-11-25 17:44:41,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:41,326 INFO L130 PetriNetUnfolder]: 197/416 cut-off events. [2022-11-25 17:44:41,326 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-25 17:44:41,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 416 events. 197/416 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1773 event pairs, 168 based on Foata normal form. 6/312 useless extension candidates. Maximal degree in co-relation 998. Up to 395 conditions per place. [2022-11-25 17:44:41,330 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 22 selfloop transitions, 11 changer transitions 0/34 dead transitions. [2022-11-25 17:44:41,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 34 transitions, 204 flow [2022-11-25 17:44:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:44:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:44:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1033 transitions. [2022-11-25 17:44:41,335 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46531531531531534 [2022-11-25 17:44:41,336 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1033 transitions. [2022-11-25 17:44:41,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1033 transitions. [2022-11-25 17:44:41,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:41,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1033 transitions. [2022-11-25 17:44:41,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.08333333333333) internal successors, (1033), 12 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:41,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:41,348 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:41,348 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 102 flow. Second operand 12 states and 1033 transitions. [2022-11-25 17:44:41,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 34 transitions, 204 flow [2022-11-25 17:44:41,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:41,355 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 184 flow [2022-11-25 17:44:41,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2022-11-25 17:44:41,358 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2022-11-25 17:44:41,358 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 184 flow [2022-11-25 17:44:41,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.3076923076923) internal successors, (1096), 13 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:41,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:41,359 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-25 17:44:41,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:41,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:41,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1271806582, now seen corresponding path program 2 times [2022-11-25 17:44:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:41,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169686803] [2022-11-25 17:44:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:41,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169686803] [2022-11-25 17:44:41,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169686803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:41,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:41,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:44:41,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804991562] [2022-11-25 17:44:41,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:41,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:44:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:44:41,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:44:41,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 185 [2022-11-25 17:44:41,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:41,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:41,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 185 [2022-11-25 17:44:41,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:42,034 INFO L130 PetriNetUnfolder]: 171/362 cut-off events. [2022-11-25 17:44:42,035 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2022-11-25 17:44:42,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 362 events. 171/362 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1454 event pairs, 120 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 893. Up to 300 conditions per place. [2022-11-25 17:44:42,039 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 38 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2022-11-25 17:44:42,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 292 flow [2022-11-25 17:44:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:44:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:44:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2022-11-25 17:44:42,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5171171171171172 [2022-11-25 17:44:42,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2022-11-25 17:44:42,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2022-11-25 17:44:42,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:42,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2022-11-25 17:44:42,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,046 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 184 flow. Second operand 3 states and 287 transitions. [2022-11-25 17:44:42,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 292 flow [2022-11-25 17:44:42,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 244 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 17:44:42,053 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 140 flow [2022-11-25 17:44:42,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2022-11-25 17:44:42,055 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2022-11-25 17:44:42,056 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 140 flow [2022-11-25 17:44:42,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:42,057 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-25 17:44:42,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:44:42,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1271806581, now seen corresponding path program 1 times [2022-11-25 17:44:42,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:42,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288159080] [2022-11-25 17:44:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:42,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:42,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288159080] [2022-11-25 17:44:42,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288159080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:42,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:42,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:44:42,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796094719] [2022-11-25 17:44:42,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:42,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:44:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:44:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:44:42,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 185 [2022-11-25 17:44:42,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:42,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 185 [2022-11-25 17:44:42,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:42,649 INFO L130 PetriNetUnfolder]: 158/330 cut-off events. [2022-11-25 17:44:42,649 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-11-25 17:44:42,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 330 events. 158/330 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1283 event pairs, 84 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 833. Up to 222 conditions per place. [2022-11-25 17:44:42,652 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 41 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2022-11-25 17:44:42,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 262 flow [2022-11-25 17:44:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:44:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:44:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2022-11-25 17:44:42,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48243243243243245 [2022-11-25 17:44:42,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2022-11-25 17:44:42,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2022-11-25 17:44:42,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:42,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2022-11-25 17:44:42,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,660 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 140 flow. Second operand 4 states and 357 transitions. [2022-11-25 17:44:42,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 262 flow [2022-11-25 17:44:42,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:42,664 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 144 flow [2022-11-25 17:44:42,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2022-11-25 17:44:42,665 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2022-11-25 17:44:42,665 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 144 flow [2022-11-25 17:44:42,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:42,666 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:42,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:44:42,666 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash -771288125, now seen corresponding path program 1 times [2022-11-25 17:44:42,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:42,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099370067] [2022-11-25 17:44:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:42,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099370067] [2022-11-25 17:44:42,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099370067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:42,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:42,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:44:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895797100] [2022-11-25 17:44:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:44:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:44:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:44:42,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 185 [2022-11-25 17:44:42,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 33 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:42,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 185 [2022-11-25 17:44:42,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:43,161 INFO L130 PetriNetUnfolder]: 136/300 cut-off events. [2022-11-25 17:44:43,161 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-11-25 17:44:43,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 300 events. 136/300 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1175 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 793. Up to 190 conditions per place. [2022-11-25 17:44:43,164 INFO L137 encePairwiseOnDemand]: 176/185 looper letters, 47 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2022-11-25 17:44:43,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 342 flow [2022-11-25 17:44:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:44:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:44:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 445 transitions. [2022-11-25 17:44:43,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4810810810810811 [2022-11-25 17:44:43,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 445 transitions. [2022-11-25 17:44:43,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 445 transitions. [2022-11-25 17:44:43,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:43,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 445 transitions. [2022-11-25 17:44:43,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:43,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:43,170 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:43,171 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 144 flow. Second operand 5 states and 445 transitions. [2022-11-25 17:44:43,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 342 flow [2022-11-25 17:44:43,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 57 transitions, 332 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:44:43,173 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 214 flow [2022-11-25 17:44:43,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2022-11-25 17:44:43,174 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2022-11-25 17:44:43,175 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 214 flow [2022-11-25 17:44:43,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:43,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:43,175 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:44:43,176 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 631310595, now seen corresponding path program 1 times [2022-11-25 17:44:43,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:43,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123878317] [2022-11-25 17:44:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123878317] [2022-11-25 17:44:43,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123878317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091263139] [2022-11-25 17:44:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:43,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:43,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:43,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:44:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:44:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:43,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:44:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:44,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:44,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091263139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:44,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:44,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-11-25 17:44:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795757937] [2022-11-25 17:44:44,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:44:44,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:44:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:44:45,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 185 [2022-11-25 17:44:45,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 214 flow. Second operand has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:45,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 185 [2022-11-25 17:44:45,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:45,800 INFO L130 PetriNetUnfolder]: 280/618 cut-off events. [2022-11-25 17:44:45,801 INFO L131 PetriNetUnfolder]: For 444/444 co-relation queries the response was YES. [2022-11-25 17:44:45,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 618 events. 280/618 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2533 event pairs, 54 based on Foata normal form. 84/679 useless extension candidates. Maximal degree in co-relation 1948. Up to 196 conditions per place. [2022-11-25 17:44:45,808 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 106 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2022-11-25 17:44:45,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 115 transitions, 792 flow [2022-11-25 17:44:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:44:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:44:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2022-11-25 17:44:45,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4797297297297297 [2022-11-25 17:44:45,812 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2022-11-25 17:44:45,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2022-11-25 17:44:45,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:45,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2022-11-25 17:44:45,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,819 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,820 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 214 flow. Second operand 8 states and 710 transitions. [2022-11-25 17:44:45,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 115 transitions, 792 flow [2022-11-25 17:44:45,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 115 transitions, 792 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:44:45,828 INFO L231 Difference]: Finished difference. Result has 67 places, 44 transitions, 279 flow [2022-11-25 17:44:45,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=279, PETRI_PLACES=67, PETRI_TRANSITIONS=44} [2022-11-25 17:44:45,830 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2022-11-25 17:44:45,831 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 44 transitions, 279 flow [2022-11-25 17:44:45,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:45,832 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:45,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:46,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:44:46,044 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:46,045 INFO L85 PathProgramCache]: Analyzing trace with hash 336487229, now seen corresponding path program 1 times [2022-11-25 17:44:46,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:46,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807496408] [2022-11-25 17:44:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:46,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807496408] [2022-11-25 17:44:46,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807496408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247893635] [2022-11-25 17:44:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:46,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:46,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:46,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:44:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:44:46,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:46,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:46,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:44:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:46,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:47,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247893635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:47,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:47,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-11-25 17:44:47,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543803818] [2022-11-25 17:44:47,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:44:47,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:44:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:44:47,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 185 [2022-11-25 17:44:47,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 44 transitions, 279 flow. Second operand has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:47,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:47,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 185 [2022-11-25 17:44:47,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:48,587 INFO L130 PetriNetUnfolder]: 556/1170 cut-off events. [2022-11-25 17:44:48,588 INFO L131 PetriNetUnfolder]: For 2506/2506 co-relation queries the response was YES. [2022-11-25 17:44:48,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4028 conditions, 1170 events. 556/1170 cut-off events. For 2506/2506 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5341 event pairs, 132 based on Foata normal form. 138/1285 useless extension candidates. Maximal degree in co-relation 4002. Up to 424 conditions per place. [2022-11-25 17:44:48,601 INFO L137 encePairwiseOnDemand]: 178/185 looper letters, 111 selfloop transitions, 7 changer transitions 0/119 dead transitions. [2022-11-25 17:44:48,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 1001 flow [2022-11-25 17:44:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:44:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:44:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 696 transitions. [2022-11-25 17:44:48,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4702702702702703 [2022-11-25 17:44:48,604 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 696 transitions. [2022-11-25 17:44:48,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 696 transitions. [2022-11-25 17:44:48,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:48,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 696 transitions. [2022-11-25 17:44:48,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:48,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:48,611 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:48,611 INFO L175 Difference]: Start difference. First operand has 67 places, 44 transitions, 279 flow. Second operand 8 states and 696 transitions. [2022-11-25 17:44:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 1001 flow [2022-11-25 17:44:48,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 950 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:48,618 INFO L231 Difference]: Finished difference. Result has 76 places, 48 transitions, 338 flow [2022-11-25 17:44:48,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=76, PETRI_TRANSITIONS=48} [2022-11-25 17:44:48,620 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2022-11-25 17:44:48,620 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 48 transitions, 338 flow [2022-11-25 17:44:48,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:48,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:48,621 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-25 17:44:48,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:48,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:48,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash -668243782, now seen corresponding path program 2 times [2022-11-25 17:44:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395995722] [2022-11-25 17:44:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:49,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395995722] [2022-11-25 17:44:49,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395995722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506950675] [2022-11-25 17:44:49,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:44:49,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:49,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:49,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:49,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:44:49,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:44:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:49,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:44:49,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:50,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:50,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:44:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:50,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:52,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506950675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:52,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:52,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2022-11-25 17:44:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249411872] [2022-11-25 17:44:52,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:44:52,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:52,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:44:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:44:55,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 185 [2022-11-25 17:44:55,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 48 transitions, 338 flow. Second operand has 25 states, 25 states have (on average 80.64) internal successors, (2016), 25 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:55,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:55,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 185 [2022-11-25 17:44:55,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:57,311 INFO L130 PetriNetUnfolder]: 1132/2382 cut-off events. [2022-11-25 17:44:57,311 INFO L131 PetriNetUnfolder]: For 6458/6458 co-relation queries the response was YES. [2022-11-25 17:44:57,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8933 conditions, 2382 events. 1132/2382 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 11470 event pairs, 126 based on Foata normal form. 312/2647 useless extension candidates. Maximal degree in co-relation 8903. Up to 551 conditions per place. [2022-11-25 17:44:57,339 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 250 selfloop transitions, 14 changer transitions 0/265 dead transitions. [2022-11-25 17:44:57,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 265 transitions, 2324 flow [2022-11-25 17:44:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:44:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:44:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1262 transitions. [2022-11-25 17:44:57,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48725868725868726 [2022-11-25 17:44:57,345 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1262 transitions. [2022-11-25 17:44:57,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1262 transitions. [2022-11-25 17:44:57,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:57,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1262 transitions. [2022-11-25 17:44:57,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.14285714285714) internal successors, (1262), 14 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:57,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 185.0) internal successors, (2775), 15 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:57,356 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 185.0) internal successors, (2775), 15 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:57,356 INFO L175 Difference]: Start difference. First operand has 76 places, 48 transitions, 338 flow. Second operand 14 states and 1262 transitions. [2022-11-25 17:44:57,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 265 transitions, 2324 flow [2022-11-25 17:44:57,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 265 transitions, 2227 flow, removed 36 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:57,374 INFO L231 Difference]: Finished difference. Result has 93 places, 54 transitions, 443 flow [2022-11-25 17:44:57,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=443, PETRI_PLACES=93, PETRI_TRANSITIONS=54} [2022-11-25 17:44:57,376 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2022-11-25 17:44:57,377 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 54 transitions, 443 flow [2022-11-25 17:44:57,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.64) internal successors, (2016), 25 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:57,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:57,378 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-25 17:44:57,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:57,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:44:57,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:44:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1335445075, now seen corresponding path program 2 times [2022-11-25 17:44:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:57,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874445543] [2022-11-25 17:44:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:58,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874445543] [2022-11-25 17:44:58,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874445543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574321547] [2022-11-25 17:44:58,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:44:58,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:58,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:58,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:44:58,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:44:58,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:44:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:44:58,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:44:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:58,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:44:59,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574321547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:59,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:59,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2022-11-25 17:44:59,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738694092] [2022-11-25 17:44:59,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:59,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:44:59,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:44:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:45:01,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 185 [2022-11-25 17:45:01,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 54 transitions, 443 flow. Second operand has 25 states, 25 states have (on average 79.64) internal successors, (1991), 25 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:01,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:01,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 185 [2022-11-25 17:45:01,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:04,174 INFO L130 PetriNetUnfolder]: 2260/4638 cut-off events. [2022-11-25 17:45:04,175 INFO L131 PetriNetUnfolder]: For 21482/21482 co-relation queries the response was YES. [2022-11-25 17:45:04,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17768 conditions, 4638 events. 2260/4638 cut-off events. For 21482/21482 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 24719 event pairs, 276 based on Foata normal form. 564/5155 useless extension candidates. Maximal degree in co-relation 17732. Up to 1079 conditions per place. [2022-11-25 17:45:04,253 INFO L137 encePairwiseOnDemand]: 178/185 looper letters, 273 selfloop transitions, 13 changer transitions 0/287 dead transitions. [2022-11-25 17:45:04,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 287 transitions, 3107 flow [2022-11-25 17:45:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:45:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:45:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1233 transitions. [2022-11-25 17:45:04,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4760617760617761 [2022-11-25 17:45:04,259 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1233 transitions. [2022-11-25 17:45:04,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1233 transitions. [2022-11-25 17:45:04,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:04,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1233 transitions. [2022-11-25 17:45:04,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 88.07142857142857) internal successors, (1233), 14 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:04,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 185.0) internal successors, (2775), 15 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:04,271 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 185.0) internal successors, (2775), 15 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:04,271 INFO L175 Difference]: Start difference. First operand has 93 places, 54 transitions, 443 flow. Second operand 14 states and 1233 transitions. [2022-11-25 17:45:04,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 287 transitions, 3107 flow [2022-11-25 17:45:04,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 287 transitions, 2647 flow, removed 156 selfloop flow, removed 7 redundant places. [2022-11-25 17:45:04,315 INFO L231 Difference]: Finished difference. Result has 105 places, 60 transitions, 537 flow [2022-11-25 17:45:04,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=537, PETRI_PLACES=105, PETRI_TRANSITIONS=60} [2022-11-25 17:45:04,318 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 77 predicate places. [2022-11-25 17:45:04,318 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 60 transitions, 537 flow [2022-11-25 17:45:04,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.64) internal successors, (1991), 25 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:04,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:04,319 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-25 17:45:04,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:04,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:45:04,530 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:45:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash -898803544, now seen corresponding path program 3 times [2022-11-25 17:45:04,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:04,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055880092] [2022-11-25 17:45:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:04,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:45:05,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055880092] [2022-11-25 17:45:05,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055880092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089693793] [2022-11-25 17:45:05,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:45:05,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:05,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:05,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:05,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:45:05,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:45:05,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:45:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:45:05,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:45:05,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:45:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-25 17:45:05,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:45:05,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089693793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:05,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:45:05,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2022-11-25 17:45:05,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47575271] [2022-11-25 17:45:05,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:05,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:05,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:45:06,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 185 [2022-11-25 17:45:06,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 60 transitions, 537 flow. Second operand has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:06,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:06,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 185 [2022-11-25 17:45:06,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:07,744 INFO L130 PetriNetUnfolder]: 2210/4540 cut-off events. [2022-11-25 17:45:07,745 INFO L131 PetriNetUnfolder]: For 17747/17747 co-relation queries the response was YES. [2022-11-25 17:45:07,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17730 conditions, 4540 events. 2210/4540 cut-off events. For 17747/17747 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 24117 event pairs, 85 based on Foata normal form. 50/4544 useless extension candidates. Maximal degree in co-relation 17688. Up to 4068 conditions per place. [2022-11-25 17:45:07,819 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 111 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2022-11-25 17:45:07,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 118 transitions, 1287 flow [2022-11-25 17:45:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:45:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:45:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 523 transitions. [2022-11-25 17:45:07,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4711711711711712 [2022-11-25 17:45:07,822 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 523 transitions. [2022-11-25 17:45:07,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 523 transitions. [2022-11-25 17:45:07,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:07,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 523 transitions. [2022-11-25 17:45:07,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:07,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:07,828 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:07,828 INFO L175 Difference]: Start difference. First operand has 105 places, 60 transitions, 537 flow. Second operand 6 states and 523 transitions. [2022-11-25 17:45:07,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 118 transitions, 1287 flow [2022-11-25 17:45:07,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 118 transitions, 1133 flow, removed 52 selfloop flow, removed 7 redundant places. [2022-11-25 17:45:07,900 INFO L231 Difference]: Finished difference. Result has 103 places, 60 transitions, 477 flow [2022-11-25 17:45:07,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=477, PETRI_PLACES=103, PETRI_TRANSITIONS=60} [2022-11-25 17:45:07,902 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2022-11-25 17:45:07,902 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 60 transitions, 477 flow [2022-11-25 17:45:07,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:07,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:07,903 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-25 17:45:07,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:08,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:08,109 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:45:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 673364351, now seen corresponding path program 3 times [2022-11-25 17:45:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:08,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679899100] [2022-11-25 17:45:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:45:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679899100] [2022-11-25 17:45:08,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679899100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456062441] [2022-11-25 17:45:08,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:45:08,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:08,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:08,543 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:08,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:45:08,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:45:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:45:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:45:08,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:45:08,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:45:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-25 17:45:09,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:45:09,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456062441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:09,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:45:09,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2022-11-25 17:45:09,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273854022] [2022-11-25 17:45:09,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:45:09,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 185 [2022-11-25 17:45:09,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 60 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:09,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:09,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 185 [2022-11-25 17:45:09,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:10,783 INFO L130 PetriNetUnfolder]: 2164/4448 cut-off events. [2022-11-25 17:45:10,784 INFO L131 PetriNetUnfolder]: For 15140/15140 co-relation queries the response was YES. [2022-11-25 17:45:10,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16784 conditions, 4448 events. 2164/4448 cut-off events. For 15140/15140 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 24150 event pairs, 45 based on Foata normal form. 46/4448 useless extension candidates. Maximal degree in co-relation 16741. Up to 3998 conditions per place. [2022-11-25 17:45:10,824 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 110 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2022-11-25 17:45:10,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 115 transitions, 1083 flow [2022-11-25 17:45:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:45:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:45:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 509 transitions. [2022-11-25 17:45:10,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45855855855855854 [2022-11-25 17:45:10,827 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 509 transitions. [2022-11-25 17:45:10,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 509 transitions. [2022-11-25 17:45:10,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:10,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 509 transitions. [2022-11-25 17:45:10,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.83333333333333) internal successors, (509), 6 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:10,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:10,832 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:10,832 INFO L175 Difference]: Start difference. First operand has 103 places, 60 transitions, 477 flow. Second operand 6 states and 509 transitions. [2022-11-25 17:45:10,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 115 transitions, 1083 flow [2022-11-25 17:45:10,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 115 transitions, 1065 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:45:10,863 INFO L231 Difference]: Finished difference. Result has 104 places, 60 transitions, 460 flow [2022-11-25 17:45:10,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=104, PETRI_TRANSITIONS=60} [2022-11-25 17:45:10,864 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 76 predicate places. [2022-11-25 17:45:10,864 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 60 transitions, 460 flow [2022-11-25 17:45:10,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:10,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:10,865 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-25 17:45:10,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:11,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:45:11,072 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:45:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash 673364343, now seen corresponding path program 1 times [2022-11-25 17:45:11,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:11,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130047600] [2022-11-25 17:45:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:11,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-25 17:45:11,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:11,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130047600] [2022-11-25 17:45:11,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130047600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:11,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:11,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:45:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518433373] [2022-11-25 17:45:11,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:45:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:45:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:45:11,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 185 [2022-11-25 17:45:11,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 60 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:11,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:11,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 185 [2022-11-25 17:45:11,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:12,550 INFO L130 PetriNetUnfolder]: 2118/4301 cut-off events. [2022-11-25 17:45:12,550 INFO L131 PetriNetUnfolder]: For 11374/11374 co-relation queries the response was YES. [2022-11-25 17:45:12,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16280 conditions, 4301 events. 2118/4301 cut-off events. For 11374/11374 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 22817 event pairs, 1980 based on Foata normal form. 0/4301 useless extension candidates. Maximal degree in co-relation 16237. Up to 4142 conditions per place. [2022-11-25 17:45:12,613 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 66 selfloop transitions, 4 changer transitions 2/73 dead transitions. [2022-11-25 17:45:12,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 73 transitions, 658 flow [2022-11-25 17:45:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:45:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:45:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 344 transitions. [2022-11-25 17:45:12,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4648648648648649 [2022-11-25 17:45:12,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 344 transitions. [2022-11-25 17:45:12,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 344 transitions. [2022-11-25 17:45:12,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:12,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 344 transitions. [2022-11-25 17:45:12,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:12,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:12,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:12,622 INFO L175 Difference]: Start difference. First operand has 104 places, 60 transitions, 460 flow. Second operand 4 states and 344 transitions. [2022-11-25 17:45:12,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 73 transitions, 658 flow [2022-11-25 17:45:12,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 73 transitions, 653 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:45:12,663 INFO L231 Difference]: Finished difference. Result has 103 places, 57 transitions, 389 flow [2022-11-25 17:45:12,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=103, PETRI_TRANSITIONS=57} [2022-11-25 17:45:12,664 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2022-11-25 17:45:12,664 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 57 transitions, 389 flow [2022-11-25 17:45:12,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:12,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:12,665 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:45:12,665 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-11-25 17:45:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1234096370, now seen corresponding path program 1 times [2022-11-25 17:45:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:12,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319438694] [2022-11-25 17:45:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:12,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-25 17:45:13,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:13,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319438694] [2022-11-25 17:45:13,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319438694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:13,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814363587] [2022-11-25 17:45:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:13,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:13,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:13,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:45:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:45:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-25 17:45:13,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-25 17:45:13,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814363587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:13,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:13,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-11-25 17:45:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614829784] [2022-11-25 17:45:13,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:13,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:45:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:45:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:45:13,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 185 [2022-11-25 17:45:13,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 57 transitions, 389 flow. Second operand has 9 states, 9 states have (on average 77.44444444444444) internal successors, (697), 9 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:13,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:13,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 185 [2022-11-25 17:45:13,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:14,789 INFO L130 PetriNetUnfolder]: 2072/4186 cut-off events. [2022-11-25 17:45:14,789 INFO L131 PetriNetUnfolder]: For 9585/9585 co-relation queries the response was YES. [2022-11-25 17:45:14,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15498 conditions, 4186 events. 2072/4186 cut-off events. For 9585/9585 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 21960 event pairs, 44 based on Foata normal form. 22/4208 useless extension candidates. Maximal degree in co-relation 15455. Up to 3825 conditions per place. [2022-11-25 17:45:14,815 INFO L137 encePairwiseOnDemand]: 178/185 looper letters, 0 selfloop transitions, 0 changer transitions 104/104 dead transitions. [2022-11-25 17:45:14,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 885 flow [2022-11-25 17:45:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 555 transitions. [2022-11-25 17:45:14,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-11-25 17:45:14,819 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 555 transitions. [2022-11-25 17:45:14,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 555 transitions. [2022-11-25 17:45:14,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:14,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 555 transitions. [2022-11-25 17:45:14,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.28571428571429) internal successors, (555), 7 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,824 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,825 INFO L175 Difference]: Start difference. First operand has 103 places, 57 transitions, 389 flow. Second operand 7 states and 555 transitions. [2022-11-25 17:45:14,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 885 flow [2022-11-25 17:45:14,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 104 transitions, 828 flow, removed 2 selfloop flow, removed 14 redundant places. [2022-11-25 17:45:14,858 INFO L231 Difference]: Finished difference. Result has 92 places, 0 transitions, 0 flow [2022-11-25 17:45:14,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=92, PETRI_TRANSITIONS=0} [2022-11-25 17:45:14,859 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2022-11-25 17:45:14,859 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 0 transitions, 0 flow [2022-11-25 17:45:14,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 77.44444444444444) internal successors, (697), 9 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2022-11-25 17:45:14,863 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-11-25 17:45:14,863 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2022-11-25 17:45:14,863 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-11-25 17:45:14,864 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-11-25 17:45:14,864 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-11-25 17:45:14,864 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-11-25 17:45:14,864 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2022-11-25 17:45:14,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-11-25 17:45:14,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-11-25 17:45:14,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-11-25 17:45:14,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-11-25 17:45:14,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2022-11-25 17:45:14,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2022-11-25 17:45:14,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-11-25 17:45:14,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2022-11-25 17:45:14,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:15,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:45:15,073 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:15,079 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 17:45:15,080 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:45:15,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:45:15 BasicIcfg [2022-11-25 17:45:15,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:45:15,085 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:45:15,085 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:45:15,085 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:45:15,086 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:44:33" (3/4) ... [2022-11-25 17:45:15,089 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 17:45:15,097 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2022-11-25 17:45:15,102 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-25 17:45:15,102 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 17:45:15,103 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 17:45:15,136 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 17:45:15,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:45:15,141 INFO L158 Benchmark]: Toolchain (without parser) took 43504.41ms. Allocated memory was 169.9MB in the beginning and 631.2MB in the end (delta: 461.4MB). Free memory was 126.3MB in the beginning and 216.7MB in the end (delta: -90.3MB). Peak memory consumption was 373.1MB. Max. memory is 16.1GB. [2022-11-25 17:45:15,145 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 132.1MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:45:15,146 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1111.21ms. Allocated memory is still 169.9MB. Free memory was 126.3MB in the beginning and 99.1MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-25 17:45:15,146 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.95ms. Allocated memory is still 169.9MB. Free memory was 99.1MB in the beginning and 96.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:45:15,147 INFO L158 Benchmark]: Boogie Preprocessor took 66.28ms. Allocated memory is still 169.9MB. Free memory was 96.4MB in the beginning and 94.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:45:15,149 INFO L158 Benchmark]: RCFGBuilder took 748.10ms. Allocated memory is still 169.9MB. Free memory was 94.9MB in the beginning and 128.0MB in the end (delta: -33.1MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2022-11-25 17:45:15,150 INFO L158 Benchmark]: TraceAbstraction took 41418.06ms. Allocated memory was 169.9MB in the beginning and 631.2MB in the end (delta: 461.4MB). Free memory was 128.0MB in the beginning and 218.7MB in the end (delta: -90.7MB). Peak memory consumption was 371.5MB. Max. memory is 16.1GB. [2022-11-25 17:45:15,150 INFO L158 Benchmark]: Witness Printer took 55.60ms. Allocated memory is still 631.2MB. Free memory was 218.7MB in the beginning and 216.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:45:15,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 132.1MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1111.21ms. Allocated memory is still 169.9MB. Free memory was 126.3MB in the beginning and 99.1MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.95ms. Allocated memory is still 169.9MB. Free memory was 99.1MB in the beginning and 96.4MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.28ms. Allocated memory is still 169.9MB. Free memory was 96.4MB in the beginning and 94.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 748.10ms. Allocated memory is still 169.9MB. Free memory was 94.9MB in the beginning and 128.0MB in the end (delta: -33.1MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * TraceAbstraction took 41418.06ms. Allocated memory was 169.9MB in the beginning and 631.2MB in the end (delta: 461.4MB). Free memory was 128.0MB in the beginning and 218.7MB in the end (delta: -90.7MB). Peak memory consumption was 371.5MB. Max. memory is 16.1GB. * Witness Printer took 55.60ms. Allocated memory is still 631.2MB. Free memory was 218.7MB in the beginning and 216.7MB 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: 3.6s, 89 PlacesBefore, 28 PlacesAfterwards, 91 TransitionsBefore, 27 TransitionsAfterwards, 1960 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 93 TotalNumberOfCompositions, 2707 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1937, independent: 1850, independent conditional: 0, independent unconditional: 1850, dependent: 87, dependent conditional: 0, dependent unconditional: 87, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1294, independent: 1266, independent conditional: 0, independent unconditional: 1266, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1294, independent: 1261, independent conditional: 0, independent unconditional: 1261, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 33, independent: 5, independent conditional: 0, independent unconditional: 5, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 189, independent: 22, independent conditional: 0, independent unconditional: 22, dependent: 167, dependent conditional: 0, dependent unconditional: 167, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1937, independent: 584, independent conditional: 0, independent unconditional: 584, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 1294, unknown conditional: 0, unknown unconditional: 1294] , Statistics on independence cache: Total cache size (in pairs): 63, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, 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: 932]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 115 locations, 16 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: 41.2s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 20.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4004 SdHoareTripleChecker+Valid, 10.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3460 mSDsluCounter, 1796 SdHoareTripleChecker+Invalid, 8.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1750 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10731 IncrementalHoareTripleChecker+Invalid, 10932 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 46 mSDtfsCounter, 10731 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 578 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=537occurred in iteration=13, InterpolantAutomatonStates: 109, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 701 NumberOfCodeBlocks, 621 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 840 ConstructedInterpolants, 44 QuantifiedInterpolants, 8898 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2104 ConjunctsInSsa, 197 ConjunctsInUnsatCore, 34 InterpolantComputations, 10 PerfectInterpolantSequences, 2701/3022 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 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 17:45:15,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f75db9d-2566-4731-83e0-02d94a265e32/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE