./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN --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 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --- 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-6b4ec56 [2022-11-20 12:13:47,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:13:47,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:13:47,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:13:47,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:13:47,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:13:47,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:13:47,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:13:47,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:13:47,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:13:47,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:13:47,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:13:47,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:13:47,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:13:47,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:13:47,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:13:47,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:13:47,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:13:47,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:13:47,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:13:47,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:13:47,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:13:47,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:13:47,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:13:47,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:13:47,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:13:47,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:13:47,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:13:47,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:13:47,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:13:47,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:13:47,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:13:47,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:13:47,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:13:47,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:13:47,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:13:47,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:13:47,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:13:47,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:13:47,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:13:47,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:13:47,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 12:13:47,271 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:13:47,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:13:47,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:13:47,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:13:47,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:13:47,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:13:47,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:13:47,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:13:47,273 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:13:47,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:13:47,274 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:13:47,274 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:13:47,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:13:47,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:13:47,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:13:47,275 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:13:47,275 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:13:47,275 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 12:13:47,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:13:47,275 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:13:47,275 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:13:47,276 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:13:47,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:13:47,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:13:47,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:13:47,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:13:47,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:13:47,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:13:47,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:13:47,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:13:47,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 [2022-11-20 12:13:47,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:13:47,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:13:47,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:13:47,539 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:13:47,539 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:13:47,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-11-20 12:13:50,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:13:50,941 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:13:50,941 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2022-11-20 12:13:50,959 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/data/d508444d3/5b271c36f37e42888d89d2b74d656f13/FLAG63f498d89 [2022-11-20 12:13:50,980 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/data/d508444d3/5b271c36f37e42888d89d2b74d656f13 [2022-11-20 12:13:50,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:13:50,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:13:50,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:13:50,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:13:50,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:13:50,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:13:50" (1/1) ... [2022-11-20 12:13:50,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b98b2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:50, skipping insertion in model container [2022-11-20 12:13:50,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:13:50" (1/1) ... [2022-11-20 12:13:51,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:13:51,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:13:51,235 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-11-20 12:13:51,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:13:51,256 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:13:51,308 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2022-11-20 12:13:51,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:13:51,342 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:13:51,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51 WrapperNode [2022-11-20 12:13:51,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:13:51,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:13:51,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:13:51,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:13:51,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,422 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 574 [2022-11-20 12:13:51,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:13:51,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:13:51,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:13:51,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:13:51,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,468 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:13:51,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:13:51,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:13:51,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:13:51,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (1/1) ... [2022-11-20 12:13:51,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:13:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:13:51,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:13:51,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:13:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:13:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:13:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:13:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:13:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:13:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:13:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:13:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:13:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 12:13:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 12:13:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:13:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:13:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:13:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:13:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:13:51,569 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:13:51,711 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:13:51,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:13:52,836 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:13:52,865 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:13:52,865 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 12:13:52,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:13:52 BoogieIcfgContainer [2022-11-20 12:13:52,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:13:52,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:13:52,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:13:52,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:13:52,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:13:50" (1/3) ... [2022-11-20 12:13:52,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edd824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:13:52, skipping insertion in model container [2022-11-20 12:13:52,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:13:51" (2/3) ... [2022-11-20 12:13:52,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edd824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:13:52, skipping insertion in model container [2022-11-20 12:13:52,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:13:52" (3/3) ... [2022-11-20 12:13:52,887 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2022-11-20 12:13:52,904 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:13:52,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2022-11-20 12:13:52,905 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:13:53,135 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 12:13:53,197 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 12:13:53,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 768 places, 831 transitions, 1686 flow [2022-11-20 12:13:53,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 768 places, 831 transitions, 1686 flow [2022-11-20 12:13:53,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 768 places, 831 transitions, 1686 flow [2022-11-20 12:13:53,707 INFO L130 PetriNetUnfolder]: 73/828 cut-off events. [2022-11-20 12:13:53,707 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 12:13:53,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 828 events. 73/828 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3188 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 604. Up to 2 conditions per place. [2022-11-20 12:13:53,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 230010 [2022-11-20 12:14:41,252 INFO L134 LiptonReduction]: Checked pairs total: 241106 [2022-11-20 12:14:41,252 INFO L136 LiptonReduction]: Total number of compositions: 1077 [2022-11-20 12:14:41,260 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 117 places, 122 transitions, 268 flow [2022-11-20 12:14:43,533 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 56252 states, 40280 states have (on average 5.631852035749752) internal successors, (226851), 56251 states have internal predecessors, (226851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:43,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:43,567 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=FINITE_AUTOMATA, 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;@5f39a026, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:43,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2022-11-20 12:14:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 56252 states, 40280 states have (on average 5.631852035749752) internal successors, (226851), 56251 states have internal predecessors, (226851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 12:14:43,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:43,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 12:14:43,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:14:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 115537, now seen corresponding path program 1 times [2022-11-20 12:14:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:43,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646237563] [2022-11-20 12:14:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:43,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:43,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:43,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646237563] [2022-11-20 12:14:43,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646237563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:43,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:43,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:14:43,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575600378] [2022-11-20 12:14:43,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:43,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:43,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:44,256 INFO L87 Difference]: Start difference. First operand has 56252 states, 40280 states have (on average 5.631852035749752) internal successors, (226851), 56251 states have internal predecessors, (226851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:45,409 INFO L93 Difference]: Finished difference Result 26040 states and 105579 transitions. [2022-11-20 12:14:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 12:14:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:46,199 INFO L225 Difference]: With dead ends: 26040 [2022-11-20 12:14:46,199 INFO L226 Difference]: Without dead ends: 26040 [2022-11-20 12:14:46,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:46,205 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:46,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:14:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26040 states. [2022-11-20 12:14:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26040 to 26040. [2022-11-20 12:14:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26040 states, 19888 states have (on average 5.308678600160901) internal successors, (105579), 26039 states have internal predecessors, (105579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26040 states to 26040 states and 105579 transitions. [2022-11-20 12:14:48,083 INFO L78 Accepts]: Start accepts. Automaton has 26040 states and 105579 transitions. Word has length 2 [2022-11-20 12:14:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:48,084 INFO L495 AbstractCegarLoop]: Abstraction has 26040 states and 105579 transitions. [2022-11-20 12:14:48,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 26040 states and 105579 transitions. [2022-11-20 12:14:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 12:14:48,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:48,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 12:14:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:14:48,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:14:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash 115538, now seen corresponding path program 1 times [2022-11-20 12:14:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:48,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837816007] [2022-11-20 12:14:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:48,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:48,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837816007] [2022-11-20 12:14:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837816007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:48,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:48,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:14:48,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716467450] [2022-11-20 12:14:48,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:48,472 INFO L87 Difference]: Start difference. First operand 26040 states and 105579 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:49,509 INFO L93 Difference]: Finished difference Result 26043 states and 105582 transitions. [2022-11-20 12:14:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 12:14:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:49,989 INFO L225 Difference]: With dead ends: 26043 [2022-11-20 12:14:49,990 INFO L226 Difference]: Without dead ends: 26043 [2022-11-20 12:14:49,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:49,998 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:49,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:14:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26043 states. [2022-11-20 12:14:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26043 to 26043. [2022-11-20 12:14:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26043 states, 19891 states have (on average 5.308028756724147) internal successors, (105582), 26042 states have internal predecessors, (105582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26043 states to 26043 states and 105582 transitions. [2022-11-20 12:14:51,499 INFO L78 Accepts]: Start accepts. Automaton has 26043 states and 105582 transitions. Word has length 2 [2022-11-20 12:14:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:51,499 INFO L495 AbstractCegarLoop]: Abstraction has 26043 states and 105582 transitions. [2022-11-20 12:14:51,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 26043 states and 105582 transitions. [2022-11-20 12:14:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 12:14:51,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:51,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 12:14:51,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:14:51,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:14:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash 3603162, now seen corresponding path program 1 times [2022-11-20 12:14:51,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:51,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084257337] [2022-11-20 12:14:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:51,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:51,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084257337] [2022-11-20 12:14:51,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084257337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:51,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401959247] [2022-11-20 12:14:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:51,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:51,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:51,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:51,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:14:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:51,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 12:14:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:52,031 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:14:52,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:14:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:52,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:52,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401959247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:52,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:52,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 12:14:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064257529] [2022-11-20 12:14:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:14:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:14:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:14:52,134 INFO L87 Difference]: Start difference. First operand 26043 states and 105582 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:14:54,309 INFO L93 Difference]: Finished difference Result 78118 states and 316735 transitions. [2022-11-20 12:14:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:14:54,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 12:14:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:14:55,575 INFO L225 Difference]: With dead ends: 78118 [2022-11-20 12:14:55,590 INFO L226 Difference]: Without dead ends: 78118 [2022-11-20 12:14:55,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:14:55,594 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 279 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:14:55,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 0 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:14:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78118 states. [2022-11-20 12:14:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78118 to 26052. [2022-11-20 12:14:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26052 states, 19900 states have (on average 5.306582914572864) internal successors, (105601), 26051 states have internal predecessors, (105601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26052 states to 26052 states and 105601 transitions. [2022-11-20 12:14:57,877 INFO L78 Accepts]: Start accepts. Automaton has 26052 states and 105601 transitions. Word has length 3 [2022-11-20 12:14:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:14:57,878 INFO L495 AbstractCegarLoop]: Abstraction has 26052 states and 105601 transitions. [2022-11-20 12:14:57,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26052 states and 105601 transitions. [2022-11-20 12:14:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:14:57,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:14:57,879 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 12:14:57,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:58,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 12:14:58,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:14:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:58,087 INFO L85 PathProgramCache]: Analyzing trace with hash -11049646, now seen corresponding path program 2 times [2022-11-20 12:14:58,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:58,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709216787] [2022-11-20 12:14:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:58,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:58,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:58,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709216787] [2022-11-20 12:14:58,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709216787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:58,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363182331] [2022-11-20 12:14:58,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:14:58,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:58,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:58,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:58,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:14:58,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:14:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:58,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:14:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:58,846 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:14:58,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:14:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:59,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:14:59,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363182331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:59,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:14:59,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2022-11-20 12:14:59,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298059573] [2022-11-20 12:14:59,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:59,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:14:59,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:14:59,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:14:59,059 INFO L87 Difference]: Start difference. First operand 26052 states and 105601 transitions. Second operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:01,007 INFO L93 Difference]: Finished difference Result 78115 states and 316732 transitions. [2022-11-20 12:15:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:15:01,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 12:15:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:01,499 INFO L225 Difference]: With dead ends: 78115 [2022-11-20 12:15:01,500 INFO L226 Difference]: Without dead ends: 78115 [2022-11-20 12:15:01,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:15:01,501 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 279 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:01,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 0 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:15:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78115 states. [2022-11-20 12:15:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78115 to 26043. [2022-11-20 12:15:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26043 states, 19894 states have (on average 5.307228310043229) internal successors, (105582), 26042 states have internal predecessors, (105582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26043 states to 26043 states and 105582 transitions. [2022-11-20 12:15:03,749 INFO L78 Accepts]: Start accepts. Automaton has 26043 states and 105582 transitions. Word has length 6 [2022-11-20 12:15:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:03,751 INFO L495 AbstractCegarLoop]: Abstraction has 26043 states and 105582 transitions. [2022-11-20 12:15:03,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 26043 states and 105582 transitions. [2022-11-20 12:15:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:15:03,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:03,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2022-11-20 12:15:03,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:03,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:03,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash -954603309, now seen corresponding path program 1 times [2022-11-20 12:15:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735651633] [2022-11-20 12:15:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:03,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:15:04,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735651633] [2022-11-20 12:15:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735651633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935229872] [2022-11-20 12:15:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:04,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:04,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:04,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:04,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:15:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:15:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:15:04,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:15:04,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935229872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:04,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:04,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-11-20 12:15:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139148789] [2022-11-20 12:15:04,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:15:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:15:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:15:04,367 INFO L87 Difference]: Start difference. First operand 26043 states and 105582 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:04,927 INFO L93 Difference]: Finished difference Result 26052 states and 105591 transitions. [2022-11-20 12:15:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:15:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 12:15:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:05,068 INFO L225 Difference]: With dead ends: 26052 [2022-11-20 12:15:05,068 INFO L226 Difference]: Without dead ends: 26052 [2022-11-20 12:15:05,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:15:05,069 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:05,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:15:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26052 states. [2022-11-20 12:15:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26052 to 26052. [2022-11-20 12:15:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26052 states, 19903 states have (on average 5.305280610963171) internal successors, (105591), 26051 states have internal predecessors, (105591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26052 states to 26052 states and 105591 transitions. [2022-11-20 12:15:06,148 INFO L78 Accepts]: Start accepts. Automaton has 26052 states and 105591 transitions. Word has length 10 [2022-11-20 12:15:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:06,148 INFO L495 AbstractCegarLoop]: Abstraction has 26052 states and 105591 transitions. [2022-11-20 12:15:06,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 26052 states and 105591 transitions. [2022-11-20 12:15:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 12:15:06,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:06,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-20 12:15:06,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 12:15:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:06,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash 95356538, now seen corresponding path program 2 times [2022-11-20 12:15:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:06,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797820309] [2022-11-20 12:15:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:15:07,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:07,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797820309] [2022-11-20 12:15:07,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797820309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:07,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:07,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:15:07,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122876331] [2022-11-20 12:15:07,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:07,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:15:07,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:15:07,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:07,018 INFO L87 Difference]: Start difference. First operand 26052 states and 105591 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:07,365 INFO L93 Difference]: Finished difference Result 20435 states and 80702 transitions. [2022-11-20 12:15:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 12:15:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:07,482 INFO L225 Difference]: With dead ends: 20435 [2022-11-20 12:15:07,482 INFO L226 Difference]: Without dead ends: 20435 [2022-11-20 12:15:07,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:07,485 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 187 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:07,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20435 states. [2022-11-20 12:15:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20435 to 20435. [2022-11-20 12:15:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20435 states, 16072 states have (on average 5.021279243404679) internal successors, (80702), 20434 states have internal predecessors, (80702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20435 states to 20435 states and 80702 transitions. [2022-11-20 12:15:08,640 INFO L78 Accepts]: Start accepts. Automaton has 20435 states and 80702 transitions. Word has length 19 [2022-11-20 12:15:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:08,640 INFO L495 AbstractCegarLoop]: Abstraction has 20435 states and 80702 transitions. [2022-11-20 12:15:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20435 states and 80702 transitions. [2022-11-20 12:15:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 12:15:08,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:08,641 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-20 12:15:08,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:15:08,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash 95356539, now seen corresponding path program 1 times [2022-11-20 12:15:08,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:08,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628820902] [2022-11-20 12:15:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:08,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:15:09,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:09,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628820902] [2022-11-20 12:15:09,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628820902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:09,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:09,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72981940] [2022-11-20 12:15:09,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:09,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:15:09,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:09,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:15:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:15:09,195 INFO L87 Difference]: Start difference. First operand 20435 states and 80702 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:09,553 INFO L93 Difference]: Finished difference Result 14818 states and 55813 transitions. [2022-11-20 12:15:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 12:15:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:09,647 INFO L225 Difference]: With dead ends: 14818 [2022-11-20 12:15:09,647 INFO L226 Difference]: Without dead ends: 14818 [2022-11-20 12:15:09,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:15:09,648 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:09,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14818 states. [2022-11-20 12:15:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14818 to 14818. [2022-11-20 12:15:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14818 states, 12241 states have (on average 4.5595131116738825) internal successors, (55813), 14817 states have internal predecessors, (55813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14818 states to 14818 states and 55813 transitions. [2022-11-20 12:15:10,548 INFO L78 Accepts]: Start accepts. Automaton has 14818 states and 55813 transitions. Word has length 19 [2022-11-20 12:15:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:10,549 INFO L495 AbstractCegarLoop]: Abstraction has 14818 states and 55813 transitions. [2022-11-20 12:15:10,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 14818 states and 55813 transitions. [2022-11-20 12:15:10,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:15:10,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:10,550 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:10,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:15:10,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:10,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1443400466, now seen corresponding path program 1 times [2022-11-20 12:15:10,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:10,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555315536] [2022-11-20 12:15:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:10,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 12:15:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:11,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555315536] [2022-11-20 12:15:11,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555315536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:11,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510742800] [2022-11-20 12:15:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:11,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:11,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:15:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:15:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:11,825 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-20 12:15:11,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-20 12:15:11,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-11-20 12:15:11,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:11,943 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 [2022-11-20 12:15:11,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:11,992 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 [2022-11-20 12:15:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:15:12,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:15:12,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510742800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:12,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:15:12,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 11 [2022-11-20 12:15:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044144462] [2022-11-20 12:15:12,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:12,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:15:12,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:12,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:15:12,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:15:12,028 INFO L87 Difference]: Start difference. First operand 14818 states and 55813 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:12,315 INFO L93 Difference]: Finished difference Result 14560 states and 54997 transitions. [2022-11-20 12:15:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:12,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 12:15:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:12,395 INFO L225 Difference]: With dead ends: 14560 [2022-11-20 12:15:12,399 INFO L226 Difference]: Without dead ends: 14560 [2022-11-20 12:15:12,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:15:12,401 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:12,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14560 states. [2022-11-20 12:15:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14560 to 14560. [2022-11-20 12:15:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 12117 states have (on average 4.53882974333581) internal successors, (54997), 14559 states have internal predecessors, (54997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 54997 transitions. [2022-11-20 12:15:13,004 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 54997 transitions. Word has length 21 [2022-11-20 12:15:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:13,005 INFO L495 AbstractCegarLoop]: Abstraction has 14560 states and 54997 transitions. [2022-11-20 12:15:13,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 54997 transitions. [2022-11-20 12:15:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:15:13,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:13,006 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:13,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:13,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:13,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:13,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1443400468, now seen corresponding path program 1 times [2022-11-20 12:15:13,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:13,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893589940] [2022-11-20 12:15:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:13,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:15:13,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893589940] [2022-11-20 12:15:13,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893589940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:13,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:13,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:15:13,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975079477] [2022-11-20 12:15:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:13,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:15:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:15:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:13,607 INFO L87 Difference]: Start difference. First operand 14560 states and 54997 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:13,884 INFO L93 Difference]: Finished difference Result 14302 states and 54181 transitions. [2022-11-20 12:15:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:13,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 12:15:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:13,962 INFO L225 Difference]: With dead ends: 14302 [2022-11-20 12:15:13,964 INFO L226 Difference]: Without dead ends: 14302 [2022-11-20 12:15:13,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:13,966 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:13,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14302 states. [2022-11-20 12:15:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14302 to 14302. [2022-11-20 12:15:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14302 states, 11993 states have (on average 4.517718669223714) internal successors, (54181), 14301 states have internal predecessors, (54181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14302 states to 14302 states and 54181 transitions. [2022-11-20 12:15:14,561 INFO L78 Accepts]: Start accepts. Automaton has 14302 states and 54181 transitions. Word has length 21 [2022-11-20 12:15:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:14,561 INFO L495 AbstractCegarLoop]: Abstraction has 14302 states and 54181 transitions. [2022-11-20 12:15:14,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 14302 states and 54181 transitions. [2022-11-20 12:15:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 12:15:14,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:14,563 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:14,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:15:14,563 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1795749904, now seen corresponding path program 1 times [2022-11-20 12:15:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:14,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352145826] [2022-11-20 12:15:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:14,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:15:14,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352145826] [2022-11-20 12:15:14,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352145826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:14,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:14,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:15:14,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542338260] [2022-11-20 12:15:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:14,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:15:14,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:15:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:15:14,772 INFO L87 Difference]: Start difference. First operand 14302 states and 54181 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:15,023 INFO L93 Difference]: Finished difference Result 10174 states and 39069 transitions. [2022-11-20 12:15:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:15:15,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 12:15:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:15,072 INFO L225 Difference]: With dead ends: 10174 [2022-11-20 12:15:15,073 INFO L226 Difference]: Without dead ends: 10174 [2022-11-20 12:15:15,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:15,074 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 157 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:15,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10174 states. [2022-11-20 12:15:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10174 to 10174. [2022-11-20 12:15:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10174 states, 8873 states have (on average 4.403133100416995) internal successors, (39069), 10173 states have internal predecessors, (39069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10174 states to 10174 states and 39069 transitions. [2022-11-20 12:15:15,375 INFO L78 Accepts]: Start accepts. Automaton has 10174 states and 39069 transitions. Word has length 22 [2022-11-20 12:15:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:15,376 INFO L495 AbstractCegarLoop]: Abstraction has 10174 states and 39069 transitions. [2022-11-20 12:15:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10174 states and 39069 transitions. [2022-11-20 12:15:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 12:15:15,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:15,377 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:15,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:15:15,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1795749906, now seen corresponding path program 1 times [2022-11-20 12:15:15,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:15,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636048963] [2022-11-20 12:15:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 12:15:15,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:15,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636048963] [2022-11-20 12:15:15,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636048963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:15,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:15,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:15:15,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258152097] [2022-11-20 12:15:15,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:15:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:15:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:15:15,585 INFO L87 Difference]: Start difference. First operand 10174 states and 39069 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:15,816 INFO L93 Difference]: Finished difference Result 7920 states and 30633 transitions. [2022-11-20 12:15:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:15:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 12:15:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:15,855 INFO L225 Difference]: With dead ends: 7920 [2022-11-20 12:15:15,855 INFO L226 Difference]: Without dead ends: 7920 [2022-11-20 12:15:15,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:15,856 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 150 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:15,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2022-11-20 12:15:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 7920. [2022-11-20 12:15:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7920 states, 7076 states have (on average 4.329140757490108) internal successors, (30633), 7919 states have internal predecessors, (30633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7920 states to 7920 states and 30633 transitions. [2022-11-20 12:15:16,401 INFO L78 Accepts]: Start accepts. Automaton has 7920 states and 30633 transitions. Word has length 22 [2022-11-20 12:15:16,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:16,402 INFO L495 AbstractCegarLoop]: Abstraction has 7920 states and 30633 transitions. [2022-11-20 12:15:16,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7920 states and 30633 transitions. [2022-11-20 12:15:16,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 12:15:16,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:16,403 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:16,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:15:16,403 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1795749907, now seen corresponding path program 1 times [2022-11-20 12:15:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588055143] [2022-11-20 12:15:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 12:15:17,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588055143] [2022-11-20 12:15:17,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588055143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065235185] [2022-11-20 12:15:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:17,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:17,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:17,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:15:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 12:15:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:17,669 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:15:17,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:15:17,897 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:15:17,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:15:17,903 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 14 treesize of output 16 [2022-11-20 12:15:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:17,987 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 14 treesize of output 16 [2022-11-20 12:15:17,996 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:15:17,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:15:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:18,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:24,302 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:15:27,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 153 [2022-11-20 12:15:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:28,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065235185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:28,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:28,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2022-11-20 12:15:28,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274482746] [2022-11-20 12:15:28,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:28,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 12:15:28,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 12:15:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:15:28,317 INFO L87 Difference]: Start difference. First operand 7920 states and 30633 transitions. Second operand has 31 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:30,297 INFO L93 Difference]: Finished difference Result 14438 states and 55097 transitions. [2022-11-20 12:15:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:15:30,298 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 12:15:30,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:30,526 INFO L225 Difference]: With dead ends: 14438 [2022-11-20 12:15:30,526 INFO L226 Difference]: Without dead ends: 14438 [2022-11-20 12:15:30,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 12:15:30,528 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1383 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:30,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 0 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 327 Invalid, 0 Unknown, 100 Unchecked, 0.7s Time] [2022-11-20 12:15:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14438 states. [2022-11-20 12:15:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14438 to 9688. [2022-11-20 12:15:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 8948 states have (on average 4.39640143048726) internal successors, (39339), 9687 states have internal predecessors, (39339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 39339 transitions. [2022-11-20 12:15:30,794 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 39339 transitions. Word has length 22 [2022-11-20 12:15:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:30,795 INFO L495 AbstractCegarLoop]: Abstraction has 9688 states and 39339 transitions. [2022-11-20 12:15:30,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 39339 transitions. [2022-11-20 12:15:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 12:15:30,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:30,796 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:30,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:30,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:15:30,999 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1795749909, now seen corresponding path program 1 times [2022-11-20 12:15:31,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:31,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948134872] [2022-11-20 12:15:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:31,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:31,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:31,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948134872] [2022-11-20 12:15:31,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948134872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:31,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521050888] [2022-11-20 12:15:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:31,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:31,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:31,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:31,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:15:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:31,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:15:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:31,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:15:31,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:15:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:31,771 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 14 treesize of output 16 [2022-11-20 12:15:31,782 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:15:31,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:15:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:31,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:37,978 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:15:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:38,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521050888] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:38,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:15:38,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2022-11-20 12:15:38,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201243819] [2022-11-20 12:15:38,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:38,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:15:38,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:15:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:15:38,341 INFO L87 Difference]: Start difference. First operand 9688 states and 39339 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:38,807 INFO L93 Difference]: Finished difference Result 14052 states and 54747 transitions. [2022-11-20 12:15:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:15:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 12:15:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:38,879 INFO L225 Difference]: With dead ends: 14052 [2022-11-20 12:15:38,879 INFO L226 Difference]: Without dead ends: 14052 [2022-11-20 12:15:38,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:15:38,881 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 145 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:38,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 0 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 142 Unchecked, 0.3s Time] [2022-11-20 12:15:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14052 states. [2022-11-20 12:15:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14052 to 11456. [2022-11-20 12:15:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11456 states, 10716 states have (on average 4.359742441209407) internal successors, (46719), 11455 states have internal predecessors, (46719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11456 states to 11456 states and 46719 transitions. [2022-11-20 12:15:39,563 INFO L78 Accepts]: Start accepts. Automaton has 11456 states and 46719 transitions. Word has length 22 [2022-11-20 12:15:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:39,563 INFO L495 AbstractCegarLoop]: Abstraction has 11456 states and 46719 transitions. [2022-11-20 12:15:39,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11456 states and 46719 transitions. [2022-11-20 12:15:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 12:15:39,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:39,564 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:39,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 12:15:39,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:15:39,767 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -166506144, now seen corresponding path program 1 times [2022-11-20 12:15:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:39,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058188737] [2022-11-20 12:15:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:15:40,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058188737] [2022-11-20 12:15:40,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058188737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:40,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:40,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:15:40,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431358277] [2022-11-20 12:15:40,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:40,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:15:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:15:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:40,079 INFO L87 Difference]: Start difference. First operand 11456 states and 46719 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:40,333 INFO L93 Difference]: Finished difference Result 10898 states and 44710 transitions. [2022-11-20 12:15:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 12:15:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:40,394 INFO L225 Difference]: With dead ends: 10898 [2022-11-20 12:15:40,394 INFO L226 Difference]: Without dead ends: 10898 [2022-11-20 12:15:40,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:15:40,395 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:40,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10898 states. [2022-11-20 12:15:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10898 to 10898. [2022-11-20 12:15:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10898 states, 10255 states have (on average 4.359824475865431) internal successors, (44710), 10897 states have internal predecessors, (44710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10898 states to 10898 states and 44710 transitions. [2022-11-20 12:15:40,740 INFO L78 Accepts]: Start accepts. Automaton has 10898 states and 44710 transitions. Word has length 23 [2022-11-20 12:15:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:40,741 INFO L495 AbstractCegarLoop]: Abstraction has 10898 states and 44710 transitions. [2022-11-20 12:15:40,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10898 states and 44710 transitions. [2022-11-20 12:15:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 12:15:40,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:40,747 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:40,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:15:40,747 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash -166506145, now seen corresponding path program 1 times [2022-11-20 12:15:40,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:40,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008708705] [2022-11-20 12:15:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:40,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:15:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008708705] [2022-11-20 12:15:41,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008708705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41836565] [2022-11-20 12:15:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:41,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:41,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:41,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:15:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:15:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:41,516 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 12:15:41,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-20 12:15:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:41,579 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 [2022-11-20 12:15:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:41,627 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 [2022-11-20 12:15:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:15:41,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:15:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41836565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:41,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:15:41,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2022-11-20 12:15:41,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616654591] [2022-11-20 12:15:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:15:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:15:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:15:41,684 INFO L87 Difference]: Start difference. First operand 10898 states and 44710 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:41,932 INFO L93 Difference]: Finished difference Result 10340 states and 42701 transitions. [2022-11-20 12:15:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 12:15:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:42,132 INFO L225 Difference]: With dead ends: 10340 [2022-11-20 12:15:42,132 INFO L226 Difference]: Without dead ends: 10340 [2022-11-20 12:15:42,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:15:42,133 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 135 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:42,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:15:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10340 states. [2022-11-20 12:15:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10340 to 10340. [2022-11-20 12:15:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10340 states, 9794 states have (on average 4.359914233204003) internal successors, (42701), 10339 states have internal predecessors, (42701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10340 states to 10340 states and 42701 transitions. [2022-11-20 12:15:42,455 INFO L78 Accepts]: Start accepts. Automaton has 10340 states and 42701 transitions. Word has length 23 [2022-11-20 12:15:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:42,455 INFO L495 AbstractCegarLoop]: Abstraction has 10340 states and 42701 transitions. [2022-11-20 12:15:42,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 10340 states and 42701 transitions. [2022-11-20 12:15:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 12:15:42,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:42,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:42,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:42,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:15:42,668 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash -866709216, now seen corresponding path program 1 times [2022-11-20 12:15:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:42,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087954468] [2022-11-20 12:15:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:43,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087954468] [2022-11-20 12:15:43,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087954468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845420219] [2022-11-20 12:15:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:43,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:43,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:15:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:15:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:43,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:43,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-20 12:15:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845420219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:43,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:43,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-20 12:15:43,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388825186] [2022-11-20 12:15:43,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:43,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 12:15:43,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:43,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 12:15:43,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:15:43,738 INFO L87 Difference]: Start difference. First operand 10340 states and 42701 transitions. Second operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:44,913 INFO L93 Difference]: Finished difference Result 26220 states and 108401 transitions. [2022-11-20 12:15:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:15:44,913 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 12:15:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:45,071 INFO L225 Difference]: With dead ends: 26220 [2022-11-20 12:15:45,071 INFO L226 Difference]: Without dead ends: 26220 [2022-11-20 12:15:45,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:15:45,072 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 614 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:45,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 0 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:15:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2022-11-20 12:15:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 16398. [2022-11-20 12:15:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16398 states, 15852 states have (on average 4.9147741609891495) internal successors, (77909), 16397 states have internal predecessors, (77909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16398 states to 16398 states and 77909 transitions. [2022-11-20 12:15:45,837 INFO L78 Accepts]: Start accepts. Automaton has 16398 states and 77909 transitions. Word has length 24 [2022-11-20 12:15:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:45,838 INFO L495 AbstractCegarLoop]: Abstraction has 16398 states and 77909 transitions. [2022-11-20 12:15:45,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 16398 states and 77909 transitions. [2022-11-20 12:15:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 12:15:45,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:45,839 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:45,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:46,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:15:46,043 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash -866709215, now seen corresponding path program 1 times [2022-11-20 12:15:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:46,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023603464] [2022-11-20 12:15:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:15:46,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023603464] [2022-11-20 12:15:46,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023603464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:46,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:46,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:15:46,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112150312] [2022-11-20 12:15:46,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:15:46,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:15:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:15:46,154 INFO L87 Difference]: Start difference. First operand 16398 states and 77909 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:46,402 INFO L93 Difference]: Finished difference Result 11306 states and 52115 transitions. [2022-11-20 12:15:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:15:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 12:15:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:46,467 INFO L225 Difference]: With dead ends: 11306 [2022-11-20 12:15:46,467 INFO L226 Difference]: Without dead ends: 11306 [2022-11-20 12:15:46,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:15:46,468 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:46,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:15:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11306 states. [2022-11-20 12:15:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11306 to 11306. [2022-11-20 12:15:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11054 states have (on average 4.7145829563958745) internal successors, (52115), 11305 states have internal predecessors, (52115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 52115 transitions. [2022-11-20 12:15:46,841 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 52115 transitions. Word has length 24 [2022-11-20 12:15:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:46,843 INFO L495 AbstractCegarLoop]: Abstraction has 11306 states and 52115 transitions. [2022-11-20 12:15:46,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 52115 transitions. [2022-11-20 12:15:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 12:15:46,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:46,845 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:46,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:15:46,846 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash -866709219, now seen corresponding path program 1 times [2022-11-20 12:15:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:46,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915006430] [2022-11-20 12:15:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:47,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:47,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915006430] [2022-11-20 12:15:47,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915006430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:47,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677693932] [2022-11-20 12:15:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:47,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:47,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:47,484 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:47,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:15:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:47,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:15:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:47,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:15:47,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:15:47,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:47,890 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 14 treesize of output 16 [2022-11-20 12:15:47,901 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:15:47,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:15:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:47,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:54,104 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:15:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:54,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677693932] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:54,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:15:54,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2022-11-20 12:15:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306591779] [2022-11-20 12:15:54,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:54,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:15:54,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:15:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:15:54,491 INFO L87 Difference]: Start difference. First operand 11306 states and 52115 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:15:54,836 INFO L93 Difference]: Finished difference Result 10596 states and 46363 transitions. [2022-11-20 12:15:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:15:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 12:15:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:15:54,884 INFO L225 Difference]: With dead ends: 10596 [2022-11-20 12:15:54,884 INFO L226 Difference]: Without dead ends: 10596 [2022-11-20 12:15:54,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:15:54,885 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:15:54,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 200 Unchecked, 0.2s Time] [2022-11-20 12:15:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10596 states. [2022-11-20 12:15:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10596 to 10220. [2022-11-20 12:15:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10220 states, 10052 states have (on average 4.502089136490251) internal successors, (45255), 10219 states have internal predecessors, (45255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10220 states to 10220 states and 45255 transitions. [2022-11-20 12:15:55,183 INFO L78 Accepts]: Start accepts. Automaton has 10220 states and 45255 transitions. Word has length 24 [2022-11-20 12:15:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:15:55,184 INFO L495 AbstractCegarLoop]: Abstraction has 10220 states and 45255 transitions. [2022-11-20 12:15:55,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 10220 states and 45255 transitions. [2022-11-20 12:15:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:15:55,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:15:55,185 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:55,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:55,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:15:55,392 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:15:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 305171753, now seen corresponding path program 1 times [2022-11-20 12:15:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404725011] [2022-11-20 12:15:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 12:15:56,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:56,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404725011] [2022-11-20 12:15:56,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404725011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:56,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902483374] [2022-11-20 12:15:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:56,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:56,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:56,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:56,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:15:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 12:15:56,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:56,705 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:15:56,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:15:56,773 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:15:56,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:15:56,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:15:56,975 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 19 treesize of output 19 [2022-11-20 12:15:56,988 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:15:56,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:15:57,055 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:15:57,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:15:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:15:57,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:03,436 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:16:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:03,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902483374] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:03,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:16:03,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 8] total 29 [2022-11-20 12:16:03,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976213654] [2022-11-20 12:16:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:03,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:16:03,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:03,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:16:03,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:16:03,934 INFO L87 Difference]: Start difference. First operand 10220 states and 45255 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:04,336 INFO L93 Difference]: Finished difference Result 13138 states and 60901 transitions. [2022-11-20 12:16:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:16:04,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 12:16:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:04,400 INFO L225 Difference]: With dead ends: 13138 [2022-11-20 12:16:04,401 INFO L226 Difference]: Without dead ends: 13138 [2022-11-20 12:16:04,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:16:04,402 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:04,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 218 Unchecked, 0.3s Time] [2022-11-20 12:16:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13138 states. [2022-11-20 12:16:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13138 to 11678. [2022-11-20 12:16:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11678 states, 11510 states have (on average 4.864726324934839) internal successors, (55993), 11677 states have internal predecessors, (55993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11678 states to 11678 states and 55993 transitions. [2022-11-20 12:16:04,712 INFO L78 Accepts]: Start accepts. Automaton has 11678 states and 55993 transitions. Word has length 26 [2022-11-20 12:16:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:04,712 INFO L495 AbstractCegarLoop]: Abstraction has 11678 states and 55993 transitions. [2022-11-20 12:16:04,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11678 states and 55993 transitions. [2022-11-20 12:16:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:16:04,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:04,714 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:04,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:04,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:04,921 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash 305171945, now seen corresponding path program 1 times [2022-11-20 12:16:04,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160451845] [2022-11-20 12:16:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:04,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:05,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:05,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160451845] [2022-11-20 12:16:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160451845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511218393] [2022-11-20 12:16:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:05,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:05,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:05,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:05,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:16:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:05,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:16:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:05,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:05,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-20 12:16:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:05,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511218393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:05,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:05,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-20 12:16:05,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301957644] [2022-11-20 12:16:05,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:05,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 12:16:05,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 12:16:05,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:16:05,973 INFO L87 Difference]: Start difference. First operand 11678 states and 55993 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:06,767 INFO L93 Difference]: Finished difference Result 17514 states and 77079 transitions. [2022-11-20 12:16:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:16:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 12:16:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:06,838 INFO L225 Difference]: With dead ends: 17514 [2022-11-20 12:16:06,838 INFO L226 Difference]: Without dead ends: 17514 [2022-11-20 12:16:06,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:16:06,839 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 786 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:06,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 0 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:16:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17514 states. [2022-11-20 12:16:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17514 to 13136. [2022-11-20 12:16:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 12968 states have (on average 4.808528685996299) internal successors, (62357), 13135 states have internal predecessors, (62357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 62357 transitions. [2022-11-20 12:16:07,180 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 62357 transitions. Word has length 26 [2022-11-20 12:16:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:07,181 INFO L495 AbstractCegarLoop]: Abstraction has 13136 states and 62357 transitions. [2022-11-20 12:16:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 62357 transitions. [2022-11-20 12:16:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 12:16:07,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:07,182 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:07,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:07,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:07,388 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1380104544, now seen corresponding path program 1 times [2022-11-20 12:16:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:07,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745651551] [2022-11-20 12:16:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:07,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:16:08,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:08,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745651551] [2022-11-20 12:16:08,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745651551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:08,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198680924] [2022-11-20 12:16:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:08,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:08,271 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:08,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:16:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 12:16:08,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:16:08,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:16:08,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198680924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:08,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:16:08,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 20 [2022-11-20 12:16:08,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807136658] [2022-11-20 12:16:08,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:08,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:16:08,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:16:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:16:08,777 INFO L87 Difference]: Start difference. First operand 13136 states and 62357 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:09,496 INFO L93 Difference]: Finished difference Result 19166 states and 88855 transitions. [2022-11-20 12:16:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:16:09,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 12:16:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:09,612 INFO L225 Difference]: With dead ends: 19166 [2022-11-20 12:16:09,612 INFO L226 Difference]: Without dead ends: 19166 [2022-11-20 12:16:09,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:16:09,614 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:09,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:16:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19166 states. [2022-11-20 12:16:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19166 to 14654. [2022-11-20 12:16:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14654 states, 14486 states have (on average 4.794767361590501) internal successors, (69457), 14653 states have internal predecessors, (69457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14654 states to 14654 states and 69457 transitions. [2022-11-20 12:16:10,055 INFO L78 Accepts]: Start accepts. Automaton has 14654 states and 69457 transitions. Word has length 27 [2022-11-20 12:16:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:10,055 INFO L495 AbstractCegarLoop]: Abstraction has 14654 states and 69457 transitions. [2022-11-20 12:16:10,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 14654 states and 69457 transitions. [2022-11-20 12:16:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 12:16:10,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:10,057 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:10,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:10,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:10,259 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:10,259 INFO L85 PathProgramCache]: Analyzing trace with hash 870399208, now seen corresponding path program 1 times [2022-11-20 12:16:10,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:10,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974951456] [2022-11-20 12:16:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:10,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 12:16:11,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:11,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974951456] [2022-11-20 12:16:11,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974951456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:11,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183673666] [2022-11-20 12:16:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:11,211 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:11,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:16:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:11,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 12:16:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:11,575 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:16:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:16:11,739 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:16:11,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:16:11,831 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:16:11,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:16:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:12,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:12,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 125 [2022-11-20 12:16:12,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-11-20 12:16:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:12,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183673666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:12,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:12,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 30 [2022-11-20 12:16:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718545972] [2022-11-20 12:16:12,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:12,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:16:12,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:16:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:16:12,835 INFO L87 Difference]: Start difference. First operand 14654 states and 69457 transitions. Second operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:15,384 INFO L93 Difference]: Finished difference Result 27670 states and 124527 transitions. [2022-11-20 12:16:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:16:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 12:16:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:15,524 INFO L225 Difference]: With dead ends: 27670 [2022-11-20 12:16:15,524 INFO L226 Difference]: Without dead ends: 27670 [2022-11-20 12:16:15,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=510, Invalid=1746, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 12:16:15,526 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 818 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:15,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 0 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1448 Invalid, 0 Unknown, 2 Unchecked, 1.3s Time] [2022-11-20 12:16:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27670 states. [2022-11-20 12:16:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27670 to 17906. [2022-11-20 12:16:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17906 states, 17738 states have (on average 5.173018378622167) internal successors, (91759), 17905 states have internal predecessors, (91759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17906 states to 17906 states and 91759 transitions. [2022-11-20 12:16:16,084 INFO L78 Accepts]: Start accepts. Automaton has 17906 states and 91759 transitions. Word has length 27 [2022-11-20 12:16:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:16,085 INFO L495 AbstractCegarLoop]: Abstraction has 17906 states and 91759 transitions. [2022-11-20 12:16:16,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 17906 states and 91759 transitions. [2022-11-20 12:16:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:16:16,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:16,086 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:16,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:16,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 12:16:16,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:16,287 INFO L85 PathProgramCache]: Analyzing trace with hash 285160713, now seen corresponding path program 1 times [2022-11-20 12:16:16,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:16,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811874575] [2022-11-20 12:16:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:16,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:16:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:16,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811874575] [2022-11-20 12:16:16,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811874575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:16,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233532978] [2022-11-20 12:16:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:16,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:16,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:16,696 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:16,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:16:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:16:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:16:17,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:16:17,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233532978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:17,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:16:17,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2022-11-20 12:16:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702023466] [2022-11-20 12:16:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:17,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:16:17,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:16:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:16:17,215 INFO L87 Difference]: Start difference. First operand 17906 states and 91759 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:17,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:17,940 INFO L93 Difference]: Finished difference Result 27787 states and 139729 transitions. [2022-11-20 12:16:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:16:17,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 12:16:17,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:18,098 INFO L225 Difference]: With dead ends: 27787 [2022-11-20 12:16:18,098 INFO L226 Difference]: Without dead ends: 27787 [2022-11-20 12:16:18,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:16:18,099 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:18,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:16:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27787 states. [2022-11-20 12:16:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27787 to 20374. [2022-11-20 12:16:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20374 states, 20206 states have (on average 5.149658517272098) internal successors, (104054), 20373 states have internal predecessors, (104054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20374 states to 20374 states and 104054 transitions. [2022-11-20 12:16:19,226 INFO L78 Accepts]: Start accepts. Automaton has 20374 states and 104054 transitions. Word has length 28 [2022-11-20 12:16:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:19,227 INFO L495 AbstractCegarLoop]: Abstraction has 20374 states and 104054 transitions. [2022-11-20 12:16:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 20374 states and 104054 transitions. [2022-11-20 12:16:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:16:19,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:19,230 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:19,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 12:16:19,437 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash -517050161, now seen corresponding path program 1 times [2022-11-20 12:16:19,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:19,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149131284] [2022-11-20 12:16:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:19,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:19,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:19,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149131284] [2022-11-20 12:16:19,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149131284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:19,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115495477] [2022-11-20 12:16:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:19,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:19,899 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:19,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:16:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 12:16:20,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:16:20,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:16:20,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115495477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:20,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:16:20,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2022-11-20 12:16:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065809271] [2022-11-20 12:16:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:20,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:16:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:16:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:16:20,396 INFO L87 Difference]: Start difference. First operand 20374 states and 104054 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:21,187 INFO L93 Difference]: Finished difference Result 25930 states and 130339 transitions. [2022-11-20 12:16:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:16:21,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 12:16:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:21,313 INFO L225 Difference]: With dead ends: 25930 [2022-11-20 12:16:21,313 INFO L226 Difference]: Without dead ends: 25930 [2022-11-20 12:16:21,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:16:21,314 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:21,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:16:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25930 states. [2022-11-20 12:16:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25930 to 19757. [2022-11-20 12:16:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19757 states, 19589 states have (on average 5.09974985961509) internal successors, (99899), 19756 states have internal predecessors, (99899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19757 states to 19757 states and 99899 transitions. [2022-11-20 12:16:22,155 INFO L78 Accepts]: Start accepts. Automaton has 19757 states and 99899 transitions. Word has length 28 [2022-11-20 12:16:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:22,155 INFO L495 AbstractCegarLoop]: Abstraction has 19757 states and 99899 transitions. [2022-11-20 12:16:22,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 19757 states and 99899 transitions. [2022-11-20 12:16:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:16:22,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:22,157 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:22,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:22,362 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:22,363 INFO L85 PathProgramCache]: Analyzing trace with hash -171771297, now seen corresponding path program 2 times [2022-11-20 12:16:22,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:22,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840323346] [2022-11-20 12:16:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:22,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:16:22,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840323346] [2022-11-20 12:16:22,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840323346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858180647] [2022-11-20 12:16:22,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:16:22,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:22,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:22,726 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:22,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:16:23,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:16:23,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:16:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 12:16:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:23,074 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:16:23,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:16:23,134 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:16:23,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:16:23,225 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:16:23,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:16:23,245 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:16:23,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:16:23,337 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-20 12:16:23,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-20 12:16:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:16:23,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:16:23,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858180647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:23,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:16:23,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2022-11-20 12:16:23,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058852869] [2022-11-20 12:16:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:23,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:16:23,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:23,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:16:23,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:16:23,518 INFO L87 Difference]: Start difference. First operand 19757 states and 99899 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:23,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:23,915 INFO L93 Difference]: Finished difference Result 18521 states and 94055 transitions. [2022-11-20 12:16:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:16:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 12:16:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:24,316 INFO L225 Difference]: With dead ends: 18521 [2022-11-20 12:16:24,316 INFO L226 Difference]: Without dead ends: 18521 [2022-11-20 12:16:24,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:16:24,317 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:24,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:16:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18521 states. [2022-11-20 12:16:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18521 to 18521. [2022-11-20 12:16:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18521 states, 18401 states have (on average 5.111406988750612) internal successors, (94055), 18520 states have internal predecessors, (94055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18521 states to 18521 states and 94055 transitions. [2022-11-20 12:16:24,760 INFO L78 Accepts]: Start accepts. Automaton has 18521 states and 94055 transitions. Word has length 28 [2022-11-20 12:16:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:24,760 INFO L495 AbstractCegarLoop]: Abstraction has 18521 states and 94055 transitions. [2022-11-20 12:16:24,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18521 states and 94055 transitions. [2022-11-20 12:16:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:16:24,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:24,762 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:24,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:24,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:24,962 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:24,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1212581321, now seen corresponding path program 1 times [2022-11-20 12:16:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:24,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989941932] [2022-11-20 12:16:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:25,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989941932] [2022-11-20 12:16:25,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989941932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227433665] [2022-11-20 12:16:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:25,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:25,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:16:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 12:16:25,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:26,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:26,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 125 [2022-11-20 12:16:26,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-11-20 12:16:26,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 12:16:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:27,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227433665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:27,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:27,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-20 12:16:27,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65461350] [2022-11-20 12:16:27,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:27,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:16:27,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:16:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:16:27,072 INFO L87 Difference]: Start difference. First operand 18521 states and 94055 transitions. Second operand has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:28,940 INFO L93 Difference]: Finished difference Result 30305 states and 131373 transitions. [2022-11-20 12:16:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:16:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 12:16:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:29,073 INFO L225 Difference]: With dead ends: 30305 [2022-11-20 12:16:29,073 INFO L226 Difference]: Without dead ends: 30305 [2022-11-20 12:16:29,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:16:29,075 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1099 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:29,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 0 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:16:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30305 states. [2022-11-20 12:16:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30305 to 20203. [2022-11-20 12:16:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20203 states, 20083 states have (on average 4.876910820096599) internal successors, (97943), 20202 states have internal predecessors, (97943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20203 states to 20203 states and 97943 transitions. [2022-11-20 12:16:29,864 INFO L78 Accepts]: Start accepts. Automaton has 20203 states and 97943 transitions. Word has length 28 [2022-11-20 12:16:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:29,864 INFO L495 AbstractCegarLoop]: Abstraction has 20203 states and 97943 transitions. [2022-11-20 12:16:29,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 20203 states and 97943 transitions. [2022-11-20 12:16:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 12:16:29,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:29,867 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:29,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:30,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 12:16:30,067 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1029940369, now seen corresponding path program 1 times [2022-11-20 12:16:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:30,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830557810] [2022-11-20 12:16:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 12:16:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830557810] [2022-11-20 12:16:30,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830557810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:16:30,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:16:30,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:16:30,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653124223] [2022-11-20 12:16:30,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:30,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:16:30,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:16:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:16:30,144 INFO L87 Difference]: Start difference. First operand 20203 states and 97943 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:30,528 INFO L93 Difference]: Finished difference Result 18855 states and 89858 transitions. [2022-11-20 12:16:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:16:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 12:16:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:30,620 INFO L225 Difference]: With dead ends: 18855 [2022-11-20 12:16:30,620 INFO L226 Difference]: Without dead ends: 18855 [2022-11-20 12:16:30,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:16:30,621 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:30,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:16:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18855 states. [2022-11-20 12:16:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18855 to 16219. [2022-11-20 12:16:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16219 states, 16147 states have (on average 4.826407382176256) internal successors, (77932), 16218 states have internal predecessors, (77932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16219 states to 16219 states and 77932 transitions. [2022-11-20 12:16:31,359 INFO L78 Accepts]: Start accepts. Automaton has 16219 states and 77932 transitions. Word has length 29 [2022-11-20 12:16:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:31,360 INFO L495 AbstractCegarLoop]: Abstraction has 16219 states and 77932 transitions. [2022-11-20 12:16:31,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 16219 states and 77932 transitions. [2022-11-20 12:16:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 12:16:31,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:31,364 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:31,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 12:16:31,364 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1293700277, now seen corresponding path program 1 times [2022-11-20 12:16:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:31,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658874480] [2022-11-20 12:16:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 12:16:31,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658874480] [2022-11-20 12:16:31,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658874480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845732555] [2022-11-20 12:16:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:31,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:31,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:31,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:16:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:32,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 12:16:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:32,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-11-20 12:16:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:16:32,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:16:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845732555] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:32,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:16:32,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 14 [2022-11-20 12:16:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926388732] [2022-11-20 12:16:32,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:16:32,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:16:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:32,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:16:32,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:16:32,463 INFO L87 Difference]: Start difference. First operand 16219 states and 77932 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:32,869 INFO L93 Difference]: Finished difference Result 19123 states and 89961 transitions. [2022-11-20 12:16:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:16:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 12:16:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:32,960 INFO L225 Difference]: With dead ends: 19123 [2022-11-20 12:16:32,961 INFO L226 Difference]: Without dead ends: 19123 [2022-11-20 12:16:32,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:16:32,961 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:32,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-20 12:16:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19123 states. [2022-11-20 12:16:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19123 to 17371. [2022-11-20 12:16:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17299 states have (on average 4.795074859818486) internal successors, (82950), 17370 states have internal predecessors, (82950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 82950 transitions. [2022-11-20 12:16:33,733 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 82950 transitions. Word has length 29 [2022-11-20 12:16:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:33,733 INFO L495 AbstractCegarLoop]: Abstraction has 17371 states and 82950 transitions. [2022-11-20 12:16:33,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 82950 transitions. [2022-11-20 12:16:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:16:33,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:33,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:33,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 12:16:33,947 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1446867303, now seen corresponding path program 1 times [2022-11-20 12:16:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:33,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987157053] [2022-11-20 12:16:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:34,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:34,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987157053] [2022-11-20 12:16:34,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987157053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:34,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029439715] [2022-11-20 12:16:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:34,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:34,459 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:34,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:16:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:34,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 12:16:34,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:34,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:16:34,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:16:35,021 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:16:35,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:16:35,034 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 14 treesize of output 16 [2022-11-20 12:16:35,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 74 treesize of output 66 [2022-11-20 12:16:35,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 66 treesize of output 64 [2022-11-20 12:16:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:35,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:35,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 85 [2022-11-20 12:16:35,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 83 [2022-11-20 12:16:41,545 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:16:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:41,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029439715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:41,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:41,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-11-20 12:16:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715838828] [2022-11-20 12:16:41,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:41,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 12:16:41,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 12:16:41,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:16:41,997 INFO L87 Difference]: Start difference. First operand 17371 states and 82950 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:44,109 INFO L93 Difference]: Finished difference Result 37603 states and 174977 transitions. [2022-11-20 12:16:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:16:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 12:16:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:44,311 INFO L225 Difference]: With dead ends: 37603 [2022-11-20 12:16:44,311 INFO L226 Difference]: Without dead ends: 37603 [2022-11-20 12:16:44,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 12:16:44,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 636 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:44,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 0 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1113 Invalid, 0 Unknown, 156 Unchecked, 1.1s Time] [2022-11-20 12:16:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37603 states. [2022-11-20 12:16:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37603 to 28315. [2022-11-20 12:16:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28315 states, 28243 states have (on average 4.86963141309351) internal successors, (137533), 28314 states have internal predecessors, (137533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28315 states to 28315 states and 137533 transitions. [2022-11-20 12:16:45,439 INFO L78 Accepts]: Start accepts. Automaton has 28315 states and 137533 transitions. Word has length 30 [2022-11-20 12:16:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:45,439 INFO L495 AbstractCegarLoop]: Abstraction has 28315 states and 137533 transitions. [2022-11-20 12:16:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28315 states and 137533 transitions. [2022-11-20 12:16:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:16:45,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:45,444 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:45,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:16:45,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:45,651 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:16:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:16:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1354630377, now seen corresponding path program 2 times [2022-11-20 12:16:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:16:45,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895420284] [2022-11-20 12:16:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:16:45,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:16:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:16:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:16:47,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:16:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895420284] [2022-11-20 12:16:47,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895420284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:16:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711830016] [2022-11-20 12:16:47,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:16:47,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:16:47,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:16:47,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:16:47,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:16:47,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:16:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:16:47,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 12:16:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:16:47,766 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:16:47,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:16:47,824 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:16:47,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:16:47,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:16:47,909 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 [2022-11-20 12:16:47,917 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:16:47,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:16:47,964 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:16:47,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:16:48,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 97 [2022-11-20 12:16:48,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 95 [2022-11-20 12:16:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:16:48,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:16:48,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 125 [2022-11-20 12:16:48,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-11-20 12:16:55,250 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:16:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:16:55,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711830016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:16:55,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:16:55,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 30 [2022-11-20 12:16:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997734733] [2022-11-20 12:16:55,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:16:55,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:16:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:16:55,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:16:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:16:55,315 INFO L87 Difference]: Start difference. First operand 28315 states and 137533 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:16:58,682 INFO L93 Difference]: Finished difference Result 40095 states and 174274 transitions. [2022-11-20 12:16:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:16:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 12:16:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:16:58,869 INFO L225 Difference]: With dead ends: 40095 [2022-11-20 12:16:58,869 INFO L226 Difference]: Without dead ends: 40095 [2022-11-20 12:16:58,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=535, Invalid=1915, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 12:16:58,870 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1357 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:16:58,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 0 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2473 Invalid, 0 Unknown, 6 Unchecked, 2.1s Time] [2022-11-20 12:16:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40095 states. [2022-11-20 12:16:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40095 to 28315. [2022-11-20 12:16:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28315 states, 28243 states have (on average 4.7862833268420495) internal successors, (135179), 28314 states have internal predecessors, (135179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28315 states to 28315 states and 135179 transitions. [2022-11-20 12:16:59,841 INFO L78 Accepts]: Start accepts. Automaton has 28315 states and 135179 transitions. Word has length 30 [2022-11-20 12:16:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:16:59,842 INFO L495 AbstractCegarLoop]: Abstraction has 28315 states and 135179 transitions. [2022-11-20 12:16:59,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 28315 states and 135179 transitions. [2022-11-20 12:16:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:16:59,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:16:59,846 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:16:59,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:00,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:00,049 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:17:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1929262075, now seen corresponding path program 1 times [2022-11-20 12:17:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:00,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851801904] [2022-11-20 12:17:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:17:00,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:00,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851801904] [2022-11-20 12:17:00,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851801904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:00,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140981661] [2022-11-20 12:17:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:00,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:00,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:00,487 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:00,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 12:17:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:00,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 12:17:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:00,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 12:17:01,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 6 [2022-11-20 12:17:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:17:01,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:17:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 12:17:01,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140981661] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:01,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:17:01,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 7] total 19 [2022-11-20 12:17:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091238684] [2022-11-20 12:17:01,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:01,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:17:01,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:17:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:17:01,359 INFO L87 Difference]: Start difference. First operand 28315 states and 135179 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:17:02,137 INFO L93 Difference]: Finished difference Result 32951 states and 154208 transitions. [2022-11-20 12:17:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:17:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 12:17:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:17:02,300 INFO L225 Difference]: With dead ends: 32951 [2022-11-20 12:17:02,300 INFO L226 Difference]: Without dead ends: 32951 [2022-11-20 12:17:02,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:17:02,301 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:17:02,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-20 12:17:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32951 states. [2022-11-20 12:17:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32951 to 30671. [2022-11-20 12:17:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30671 states, 30599 states have (on average 4.761495473708291) internal successors, (145697), 30670 states have internal predecessors, (145697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30671 states to 30671 states and 145697 transitions. [2022-11-20 12:17:03,629 INFO L78 Accepts]: Start accepts. Automaton has 30671 states and 145697 transitions. Word has length 31 [2022-11-20 12:17:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:17:03,629 INFO L495 AbstractCegarLoop]: Abstraction has 30671 states and 145697 transitions. [2022-11-20 12:17:03,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 30671 states and 145697 transitions. [2022-11-20 12:17:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:17:03,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:17:03,633 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:03,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:03,836 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:17:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1594037307, now seen corresponding path program 1 times [2022-11-20 12:17:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410518665] [2022-11-20 12:17:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:17:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:04,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410518665] [2022-11-20 12:17:04,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410518665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:04,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805974261] [2022-11-20 12:17:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:04,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:04,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:04,527 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:04,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 12:17:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:04,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 12:17:04,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:04,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:17:05,120 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:17:05,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:17:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:17:05,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:17:05,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 110 [2022-11-20 12:17:05,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 108 [2022-11-20 12:17:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 12:17:05,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805974261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:17:05,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:17:05,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 10] total 35 [2022-11-20 12:17:05,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250126749] [2022-11-20 12:17:05,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:17:05,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 12:17:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 12:17:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:17:05,886 INFO L87 Difference]: Start difference. First operand 30671 states and 145697 transitions. Second operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:17:09,085 INFO L93 Difference]: Finished difference Result 96304 states and 453842 transitions. [2022-11-20 12:17:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 12:17:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 12:17:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:17:10,353 INFO L225 Difference]: With dead ends: 96304 [2022-11-20 12:17:10,353 INFO L226 Difference]: Without dead ends: 96304 [2022-11-20 12:17:10,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=392, Invalid=2260, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 12:17:10,354 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 579 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:17:10,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 0 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2341 Invalid, 0 Unknown, 156 Unchecked, 1.9s Time] [2022-11-20 12:17:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96304 states. [2022-11-20 12:17:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96304 to 63552. [2022-11-20 12:17:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63552 states, 63480 states have (on average 4.813390044108381) internal successors, (305554), 63551 states have internal predecessors, (305554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63552 states to 63552 states and 305554 transitions. [2022-11-20 12:17:13,588 INFO L78 Accepts]: Start accepts. Automaton has 63552 states and 305554 transitions. Word has length 31 [2022-11-20 12:17:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:17:13,589 INFO L495 AbstractCegarLoop]: Abstraction has 63552 states and 305554 transitions. [2022-11-20 12:17:13,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:17:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 63552 states and 305554 transitions. [2022-11-20 12:17:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:17:13,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:17:13,602 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:17:13,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 12:17:13,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:13,808 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-11-20 12:17:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:17:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash -956121816, now seen corresponding path program 3 times [2022-11-20 12:17:13,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:17:13,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269373559] [2022-11-20 12:17:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:17:13,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:17:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:17:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 12:17:16,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:17:16,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269373559] [2022-11-20 12:17:16,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269373559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:17:16,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201678220] [2022-11-20 12:17:16,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:17:16,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:17:16,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:17:16,404 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:17:16,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_744e69a2-96be-4a85-b083-a2be9b9d98df/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 12:17:16,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:17:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:17:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 12:17:16,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:17:16,852 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:17:16,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:17:16,906 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 12:17:16,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 12:17:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:17:16,988 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 [2022-11-20 12:17:16,995 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:17:16,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:17:17,052 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:17:17,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:17:17,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:17:17,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 633 treesize of output 555 [2022-11-20 12:17:17,554 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 12:17:17,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 543 treesize of output 531 [2022-11-20 12:17:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:17:18,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:17:18,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201678220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:17:18,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:17:18,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 15 [2022-11-20 12:17:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854249118] [2022-11-20 12:17:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:17:18,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:17:18,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:17:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:17:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:17:18,463 INFO L87 Difference]: Start difference. First operand 63552 states and 305554 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)