./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.0.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:21,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:21,311 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:59:21,319 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:21,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:21,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:21,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:21,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:21,365 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:21,372 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:21,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:21,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:21,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:21,376 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:21,376 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:21,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:21,400 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:21,400 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:21,401 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:21,401 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:21,401 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:59:21,404 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:59:21,404 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:59:21,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:21,405 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:59:21,405 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:59:21,406 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:21,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:21,407 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:21,408 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:21,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:21,409 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:21,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:21,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:21,410 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:21,411 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:21,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:21,411 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:21,411 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:21,412 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:21,412 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:21,412 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2023-11-26 11:59:21,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:21,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:21,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:21,810 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:21,810 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:21,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/memsafety/lockfree-3.0.i [2023-11-26 11:59:24,980 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:59:25,263 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:59:25,264 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/sv-benchmarks/c/memsafety/lockfree-3.0.i [2023-11-26 11:59:25,285 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/data/70dbdeb0b/9e11d0add97d437a8a79dd48d0d6a2dc/FLAG749c192fd [2023-11-26 11:59:25,300 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/data/70dbdeb0b/9e11d0add97d437a8a79dd48d0d6a2dc [2023-11-26 11:59:25,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:59:25,304 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:59:25,319 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:25,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:59:25,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:59:25,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a849849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25, skipping insertion in model container [2023-11-26 11:59:25,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,396 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:59:25,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:25,723 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:59:25,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:59:25,849 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:59:25,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25 WrapperNode [2023-11-26 11:59:25,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:59:25,851 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:25,852 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:59:25,852 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:59:25,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,936 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 122 [2023-11-26 11:59:25,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:59:25,937 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:59:25,938 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:59:25,938 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:59:25,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,994 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-11-26 11:59:25,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:25,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:26,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:26,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:26,051 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:26,053 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:26,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:59:26,057 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:59:26,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:59:26,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:59:26,058 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (1/1) ... [2023-11-26 11:59:26,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:26,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:59:26,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:59:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:59:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:59:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:59:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:59:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:59:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:59:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:59:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:59:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:59:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:59:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:59:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:59:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:59:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:59:26,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:59:26,301 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:59:26,304 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:59:26,664 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:59:26,704 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:59:26,704 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:59:26,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:26 BoogieIcfgContainer [2023-11-26 11:59:26,711 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:59:26,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:59:26,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:59:26,717 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:59:26,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:59:25" (1/3) ... [2023-11-26 11:59:26,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7f234e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:26, skipping insertion in model container [2023-11-26 11:59:26,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:59:25" (2/3) ... [2023-11-26 11:59:26,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7f234e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:59:26, skipping insertion in model container [2023-11-26 11:59:26,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:59:26" (3/3) ... [2023-11-26 11:59:26,720 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2023-11-26 11:59:26,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:59:26,741 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-26 11:59:26,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:59:26,799 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7b941882, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:59:26,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-26 11:59:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 35 states have (on average 2.142857142857143) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 11:59:26,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:26,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 11:59:26,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:26,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash 5969409, now seen corresponding path program 1 times [2023-11-26 11:59:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:26,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666599342] [2023-11-26 11:59:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:26,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:26,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:26,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666599342] [2023-11-26 11:59:26,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666599342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:26,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:26,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:26,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212637101] [2023-11-26 11:59:26,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:26,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:59:26,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:59:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:59:27,007 INFO L87 Difference]: Start difference. First operand has 56 states, 35 states have (on average 2.142857142857143) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:27,040 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2023-11-26 11:59:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:59:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-26 11:59:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:27,052 INFO L225 Difference]: With dead ends: 56 [2023-11-26 11:59:27,052 INFO L226 Difference]: Without dead ends: 55 [2023-11-26 11:59:27,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:59:27,058 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:27,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-26 11:59:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-26 11:59:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 2.057142857142857) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2023-11-26 11:59:27,108 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 4 [2023-11-26 11:59:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:27,109 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2023-11-26 11:59:27,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2023-11-26 11:59:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:59:27,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:27,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:59:27,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:59:27,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:27,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1323128715, now seen corresponding path program 1 times [2023-11-26 11:59:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:27,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177855960] [2023-11-26 11:59:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:27,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:27,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177855960] [2023-11-26 11:59:27,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177855960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:27,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:27,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551298938] [2023-11-26 11:59:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:27,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:27,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:27,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:27,248 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2023-11-26 11:59:27,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:27,331 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2023-11-26 11:59:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:27,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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 [2023-11-26 11:59:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:27,334 INFO L225 Difference]: With dead ends: 72 [2023-11-26 11:59:27,334 INFO L226 Difference]: Without dead ends: 72 [2023-11-26 11:59:27,334 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 [2023-11-26 11:59:27,336 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:27,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 173 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-26 11:59:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2023-11-26 11:59:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 2.0) internal successors, (74), 56 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-11-26 11:59:27,346 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 6 [2023-11-26 11:59:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:27,346 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-11-26 11:59:27,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2023-11-26 11:59:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-11-26 11:59:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:59:27,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:27,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:59:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:59:27,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:27,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1323188297, now seen corresponding path program 1 times [2023-11-26 11:59:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:27,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967009301] [2023-11-26 11:59:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967009301] [2023-11-26 11:59:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967009301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:27,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:27,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:27,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786723306] [2023-11-26 11:59:27,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:27,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:27,455 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2023-11-26 11:59:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:27,516 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2023-11-26 11:59:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:27,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 [2023-11-26 11:59:27,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:27,518 INFO L225 Difference]: With dead ends: 99 [2023-11-26 11:59:27,519 INFO L226 Difference]: Without dead ends: 99 [2023-11-26 11:59:27,519 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 [2023-11-26 11:59:27,521 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:27,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 116 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-26 11:59:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2023-11-26 11:59:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 2.015873015873016) internal successors, (127), 82 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 127 transitions. [2023-11-26 11:59:27,533 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 127 transitions. Word has length 6 [2023-11-26 11:59:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:27,533 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 127 transitions. [2023-11-26 11:59:27,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2023-11-26 11:59:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 127 transitions. [2023-11-26 11:59:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:59:27,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:27,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:27,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:59:27,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:27,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1930837147, now seen corresponding path program 1 times [2023-11-26 11:59:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:27,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021835648] [2023-11-26 11:59:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:27,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:27,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021835648] [2023-11-26 11:59:27,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021835648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:27,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:59:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448974408] [2023-11-26 11:59:27,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:27,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:27,585 INFO L87 Difference]: Start difference. First operand 83 states and 127 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2023-11-26 11:59:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:27,654 INFO L93 Difference]: Finished difference Result 154 states and 238 transitions. [2023-11-26 11:59:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 7 [2023-11-26 11:59:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:27,657 INFO L225 Difference]: With dead ends: 154 [2023-11-26 11:59:27,657 INFO L226 Difference]: Without dead ends: 151 [2023-11-26 11:59:27,680 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 [2023-11-26 11:59:27,682 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:27,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 103 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-26 11:59:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2023-11-26 11:59:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 131 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 225 transitions. [2023-11-26 11:59:27,707 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 225 transitions. Word has length 7 [2023-11-26 11:59:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:27,707 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 225 transitions. [2023-11-26 11:59:27,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2023-11-26 11:59:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 225 transitions. [2023-11-26 11:59:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:59:27,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:27,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:27,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:59:27,709 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:27,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1930894162, now seen corresponding path program 1 times [2023-11-26 11:59:27,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:27,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529281880] [2023-11-26 11:59:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:27,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:27,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529281880] [2023-11-26 11:59:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529281880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:27,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:27,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999331601] [2023-11-26 11:59:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:27,888 INFO L87 Difference]: Start difference. First operand 132 states and 225 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2023-11-26 11:59:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:28,000 INFO L93 Difference]: Finished difference Result 200 states and 324 transitions. [2023-11-26 11:59:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 7 [2023-11-26 11:59:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:28,006 INFO L225 Difference]: With dead ends: 200 [2023-11-26 11:59:28,006 INFO L226 Difference]: Without dead ends: 200 [2023-11-26 11:59:28,006 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 [2023-11-26 11:59:28,008 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 63 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:28,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 142 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-26 11:59:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2023-11-26 11:59:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 160 states have (on average 1.9375) internal successors, (310), 177 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 310 transitions. [2023-11-26 11:59:28,027 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 310 transitions. Word has length 7 [2023-11-26 11:59:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:28,028 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 310 transitions. [2023-11-26 11:59:28,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2023-11-26 11:59:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 310 transitions. [2023-11-26 11:59:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:59:28,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:59:28,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:28,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1930894161, now seen corresponding path program 1 times [2023-11-26 11:59:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:28,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12397471] [2023-11-26 11:59:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:28,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:28,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12397471] [2023-11-26 11:59:28,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12397471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:28,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:28,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:59:28,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601211599] [2023-11-26 11:59:28,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:28,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:28,193 INFO L87 Difference]: Start difference. First operand 178 states and 310 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2023-11-26 11:59:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:28,277 INFO L93 Difference]: Finished difference Result 195 states and 315 transitions. [2023-11-26 11:59:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 7 [2023-11-26 11:59:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:28,282 INFO L225 Difference]: With dead ends: 195 [2023-11-26 11:59:28,282 INFO L226 Difference]: Without dead ends: 195 [2023-11-26 11:59:28,290 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 [2023-11-26 11:59:28,296 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 62 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:28,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-26 11:59:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2023-11-26 11:59:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 160 states have (on average 1.8875) internal successors, (302), 175 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 302 transitions. [2023-11-26 11:59:28,335 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 302 transitions. Word has length 7 [2023-11-26 11:59:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:28,339 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 302 transitions. [2023-11-26 11:59:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2023-11-26 11:59:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 302 transitions. [2023-11-26 11:59:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 11:59:28,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:59:28,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:28,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash 271831126, now seen corresponding path program 1 times [2023-11-26 11:59:28,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:28,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591092362] [2023-11-26 11:59:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:28,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:28,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:28,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591092362] [2023-11-26 11:59:28,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591092362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:28,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:28,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20255583] [2023-11-26 11:59:28,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:28,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:28,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:28,398 INFO L87 Difference]: Start difference. First operand 176 states and 302 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2023-11-26 11:59:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:28,456 INFO L93 Difference]: Finished difference Result 160 states and 245 transitions. [2023-11-26 11:59:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 8 [2023-11-26 11:59:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:28,458 INFO L225 Difference]: With dead ends: 160 [2023-11-26 11:59:28,458 INFO L226 Difference]: Without dead ends: 160 [2023-11-26 11:59:28,458 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 [2023-11-26 11:59:28,459 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:28,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 152 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-26 11:59:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 136. [2023-11-26 11:59:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.8306451612903225) internal successors, (227), 135 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 227 transitions. [2023-11-26 11:59:28,473 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 227 transitions. Word has length 8 [2023-11-26 11:59:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:28,474 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 227 transitions. [2023-11-26 11:59:28,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2023-11-26 11:59:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 227 transitions. [2023-11-26 11:59:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 11:59:28,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:59:28,484 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:28,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:28,485 INFO L85 PathProgramCache]: Analyzing trace with hash -111813905, now seen corresponding path program 1 times [2023-11-26 11:59:28,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:28,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330668055] [2023-11-26 11:59:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:28,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:28,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330668055] [2023-11-26 11:59:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330668055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:28,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:28,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932376453] [2023-11-26 11:59:28,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:28,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:28,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:28,572 INFO L87 Difference]: Start difference. First operand 136 states and 227 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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) [2023-11-26 11:59:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:28,622 INFO L93 Difference]: Finished difference Result 221 states and 343 transitions. [2023-11-26 11:59:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:59:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 9 [2023-11-26 11:59:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:28,624 INFO L225 Difference]: With dead ends: 221 [2023-11-26 11:59:28,624 INFO L226 Difference]: Without dead ends: 221 [2023-11-26 11:59:28,625 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 [2023-11-26 11:59:28,627 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:28,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 144 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-26 11:59:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 200. [2023-11-26 11:59:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 188 states have (on average 1.7127659574468086) internal successors, (322), 199 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 322 transitions. [2023-11-26 11:59:28,645 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 322 transitions. Word has length 9 [2023-11-26 11:59:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:28,646 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 322 transitions. [2023-11-26 11:59:28,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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) [2023-11-26 11:59:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 322 transitions. [2023-11-26 11:59:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:59:28,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,648 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:59:28,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:28,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash -925635527, now seen corresponding path program 1 times [2023-11-26 11:59:28,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:28,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255888374] [2023-11-26 11:59:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:28,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:59:28,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:28,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255888374] [2023-11-26 11:59:28,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255888374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:28,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:28,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:59:28,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882242086] [2023-11-26 11:59:28,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:28,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:28,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:28,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:28,732 INFO L87 Difference]: Start difference. First operand 200 states and 322 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2023-11-26 11:59:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:28,754 INFO L93 Difference]: Finished difference Result 212 states and 334 transitions. [2023-11-26 11:59:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 15 [2023-11-26 11:59:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:28,757 INFO L225 Difference]: With dead ends: 212 [2023-11-26 11:59:28,758 INFO L226 Difference]: Without dead ends: 212 [2023-11-26 11:59:28,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:59:28,760 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:28,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-26 11:59:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2023-11-26 11:59:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 198 states have (on average 1.6767676767676767) internal successors, (332), 209 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 332 transitions. [2023-11-26 11:59:28,769 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 332 transitions. Word has length 15 [2023-11-26 11:59:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:28,769 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 332 transitions. [2023-11-26 11:59:28,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2023-11-26 11:59:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 332 transitions. [2023-11-26 11:59:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:59:28,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:28,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:28,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:59:28,772 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:28,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash -923788485, now seen corresponding path program 1 times [2023-11-26 11:59:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:28,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920541738] [2023-11-26 11:59:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:28,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:28,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:28,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920541738] [2023-11-26 11:59:28,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920541738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:28,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775067742] [2023-11-26 11:59:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:28,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:28,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:28,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:28,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:59:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:29,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:29,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:29,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775067742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:29,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:29,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-26 11:59:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749346529] [2023-11-26 11:59:29,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:59:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:59:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:59:29,184 INFO L87 Difference]: Start difference. First operand 210 states and 332 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:29,307 INFO L93 Difference]: Finished difference Result 214 states and 322 transitions. [2023-11-26 11:59:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:59:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 15 [2023-11-26 11:59:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:29,323 INFO L225 Difference]: With dead ends: 214 [2023-11-26 11:59:29,323 INFO L226 Difference]: Without dead ends: 214 [2023-11-26 11:59:29,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:29,324 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 204 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:29,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 225 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-26 11:59:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 206. [2023-11-26 11:59:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 194 states have (on average 1.6494845360824741) internal successors, (320), 205 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2023-11-26 11:59:29,333 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 15 [2023-11-26 11:59:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:29,333 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2023-11-26 11:59:29,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2023-11-26 11:59:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:59:29,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:29,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:29,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:29,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:29,536 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:29,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash -328431107, now seen corresponding path program 1 times [2023-11-26 11:59:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215276229] [2023-11-26 11:59:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215276229] [2023-11-26 11:59:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215276229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688675408] [2023-11-26 11:59:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:29,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:29,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:59:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:29,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:59:29,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:29,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:29,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688675408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:29,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:29,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-26 11:59:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32305498] [2023-11-26 11:59:29,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:59:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:59:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:29,806 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:29,915 INFO L93 Difference]: Finished difference Result 345 states and 504 transitions. [2023-11-26 11:59:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:59:29,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 15 [2023-11-26 11:59:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:29,919 INFO L225 Difference]: With dead ends: 345 [2023-11-26 11:59:29,919 INFO L226 Difference]: Without dead ends: 345 [2023-11-26 11:59:29,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:59:29,920 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 114 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:29,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 324 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-26 11:59:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2023-11-26 11:59:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 285 states have (on average 1.5789473684210527) internal successors, (450), 296 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 450 transitions. [2023-11-26 11:59:29,932 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 450 transitions. Word has length 15 [2023-11-26 11:59:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:29,932 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 450 transitions. [2023-11-26 11:59:29,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 450 transitions. [2023-11-26 11:59:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:59:29,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:29,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:29,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:59:30,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:30,140 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:30,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:30,141 INFO L85 PathProgramCache]: Analyzing trace with hash -31770997, now seen corresponding path program 2 times [2023-11-26 11:59:30,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:30,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785889885] [2023-11-26 11:59:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:59:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:30,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785889885] [2023-11-26 11:59:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785889885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:30,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582440532] [2023-11-26 11:59:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:59:30,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:30,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:30,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:59:30,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:59:30,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:59:30,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:59:30,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:30,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:30,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582440532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:30,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:30,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2023-11-26 11:59:30,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917381439] [2023-11-26 11:59:30,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:30,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:59:30,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:59:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:30,429 INFO L87 Difference]: Start difference. First operand 297 states and 450 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:30,579 INFO L93 Difference]: Finished difference Result 345 states and 492 transitions. [2023-11-26 11:59:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:59:30,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2023-11-26 11:59:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:30,582 INFO L225 Difference]: With dead ends: 345 [2023-11-26 11:59:30,583 INFO L226 Difference]: Without dead ends: 345 [2023-11-26 11:59:30,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:30,584 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 235 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:30,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 365 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-26 11:59:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2023-11-26 11:59:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 285 states have (on average 1.5368421052631578) internal successors, (438), 296 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 438 transitions. [2023-11-26 11:59:30,594 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 438 transitions. Word has length 21 [2023-11-26 11:59:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:30,595 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 438 transitions. [2023-11-26 11:59:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 438 transitions. [2023-11-26 11:59:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:59:30,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:30,596 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:30,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:30,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:30,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash 441010180, now seen corresponding path program 1 times [2023-11-26 11:59:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385712558] [2023-11-26 11:59:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:30,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:30,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385712558] [2023-11-26 11:59:30,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385712558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:30,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876534186] [2023-11-26 11:59:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:30,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:30,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:30,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:30,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:59:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:30,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:59:30,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:31,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:31,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876534186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:31,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:31,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-26 11:59:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827889499] [2023-11-26 11:59:31,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:59:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:59:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:59:31,170 INFO L87 Difference]: Start difference. First operand 297 states and 438 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:31,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:31,268 INFO L93 Difference]: Finished difference Result 860 states and 1258 transitions. [2023-11-26 11:59:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:59:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2023-11-26 11:59:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:31,276 INFO L225 Difference]: With dead ends: 860 [2023-11-26 11:59:31,276 INFO L226 Difference]: Without dead ends: 860 [2023-11-26 11:59:31,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:31,277 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 161 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:31,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 139 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-11-26 11:59:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 745. [2023-11-26 11:59:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 733 states have (on average 1.5225102319236017) internal successors, (1116), 744 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1116 transitions. [2023-11-26 11:59:31,322 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1116 transitions. Word has length 23 [2023-11-26 11:59:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:31,322 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1116 transitions. [2023-11-26 11:59:31,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1116 transitions. [2023-11-26 11:59:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:59:31,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:31,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:31,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:59:31,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:31,530 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:31,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1578309937, now seen corresponding path program 1 times [2023-11-26 11:59:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:31,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523456829] [2023-11-26 11:59:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:31,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:31,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523456829] [2023-11-26 11:59:31,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523456829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:31,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471080616] [2023-11-26 11:59:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:31,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:31,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:31,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:59:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:31,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:59:31,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:31,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:59:31,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471080616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:31,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:31,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-26 11:59:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395659952] [2023-11-26 11:59:31,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:31,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:31,813 INFO L87 Difference]: Start difference. First operand 745 states and 1116 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:31,911 INFO L93 Difference]: Finished difference Result 366 states and 507 transitions. [2023-11-26 11:59:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:59:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2023-11-26 11:59:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:31,914 INFO L225 Difference]: With dead ends: 366 [2023-11-26 11:59:31,914 INFO L226 Difference]: Without dead ends: 366 [2023-11-26 11:59:31,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:31,915 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 93 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:31,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 343 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-26 11:59:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 322. [2023-11-26 11:59:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 310 states have (on average 1.4806451612903226) internal successors, (459), 321 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 459 transitions. [2023-11-26 11:59:31,926 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 459 transitions. Word has length 25 [2023-11-26 11:59:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:31,927 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 459 transitions. [2023-11-26 11:59:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 459 transitions. [2023-11-26 11:59:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:59:31,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:31,928 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:31,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:32,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:32,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:32,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1970646423, now seen corresponding path program 1 times [2023-11-26 11:59:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:32,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814738013] [2023-11-26 11:59:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:32,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814738013] [2023-11-26 11:59:32,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814738013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263851018] [2023-11-26 11:59:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:32,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:32,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:32,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:32,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:59:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:32,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:59:32,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:32,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:32,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263851018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:32,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:32,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-26 11:59:32,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920498719] [2023-11-26 11:59:32,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:32,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:59:32,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:59:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:32,460 INFO L87 Difference]: Start difference. First operand 322 states and 459 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:32,689 INFO L93 Difference]: Finished difference Result 931 states and 1257 transitions. [2023-11-26 11:59:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:59:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 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 [2023-11-26 11:59:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:32,695 INFO L225 Difference]: With dead ends: 931 [2023-11-26 11:59:32,696 INFO L226 Difference]: Without dead ends: 931 [2023-11-26 11:59:32,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:59:32,697 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 223 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:32,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 473 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-26 11:59:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 826. [2023-11-26 11:59:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 814 states have (on average 1.4336609336609336) internal successors, (1167), 825 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1167 transitions. [2023-11-26 11:59:32,721 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1167 transitions. Word has length 26 [2023-11-26 11:59:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:32,722 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1167 transitions. [2023-11-26 11:59:32,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1167 transitions. [2023-11-26 11:59:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-26 11:59:32,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:32,724 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:32,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:32,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:32,931 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:32,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1812095213, now seen corresponding path program 1 times [2023-11-26 11:59:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:32,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007205916] [2023-11-26 11:59:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:32,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-26 11:59:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007205916] [2023-11-26 11:59:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007205916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428528119] [2023-11-26 11:59:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:33,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:33,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:59:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:33,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:59:33,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:33,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:59:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428528119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:33,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:33,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2023-11-26 11:59:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21263496] [2023-11-26 11:59:33,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:59:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:59:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:33,632 INFO L87 Difference]: Start difference. First operand 826 states and 1167 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:34,037 INFO L93 Difference]: Finished difference Result 1561 states and 2123 transitions. [2023-11-26 11:59:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:59:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 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 50 [2023-11-26 11:59:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:34,047 INFO L225 Difference]: With dead ends: 1561 [2023-11-26 11:59:34,047 INFO L226 Difference]: Without dead ends: 1561 [2023-11-26 11:59:34,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:59:34,049 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 358 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:34,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 545 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2023-11-26 11:59:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 910. [2023-11-26 11:59:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 898 states have (on average 1.455456570155902) internal successors, (1307), 909 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1307 transitions. [2023-11-26 11:59:34,083 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1307 transitions. Word has length 50 [2023-11-26 11:59:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:34,085 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1307 transitions. [2023-11-26 11:59:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1307 transitions. [2023-11-26 11:59:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-26 11:59:34,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:34,088 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:34,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:59:34,294 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:34,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:34,294 INFO L85 PathProgramCache]: Analyzing trace with hash 447476165, now seen corresponding path program 1 times [2023-11-26 11:59:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155264709] [2023-11-26 11:59:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-26 11:59:34,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155264709] [2023-11-26 11:59:34,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155264709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108788300] [2023-11-26 11:59:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:34,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:34,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:34,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:34,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:59:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:34,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:59:34,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:59:34,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 11:59:34,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108788300] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:34,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:59:34,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2023-11-26 11:59:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486659010] [2023-11-26 11:59:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:59:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:59:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:34,795 INFO L87 Difference]: Start difference. First operand 910 states and 1307 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:34,924 INFO L93 Difference]: Finished difference Result 1576 states and 2200 transitions. [2023-11-26 11:59:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:59:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 58 [2023-11-26 11:59:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:34,934 INFO L225 Difference]: With dead ends: 1576 [2023-11-26 11:59:34,935 INFO L226 Difference]: Without dead ends: 1576 [2023-11-26 11:59:34,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:59:34,936 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 120 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:34,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 252 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2023-11-26 11:59:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1507. [2023-11-26 11:59:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1495 states have (on average 1.4294314381270903) internal successors, (2137), 1506 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2137 transitions. [2023-11-26 11:59:34,986 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2137 transitions. Word has length 58 [2023-11-26 11:59:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:34,987 INFO L495 AbstractCegarLoop]: Abstraction has 1507 states and 2137 transitions. [2023-11-26 11:59:34,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2137 transitions. [2023-11-26 11:59:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-26 11:59:34,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:34,989 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:34,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 11:59:35,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:35,195 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:35,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1422576838, now seen corresponding path program 1 times [2023-11-26 11:59:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:35,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998644893] [2023-11-26 11:59:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:35,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-26 11:59:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998644893] [2023-11-26 11:59:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998644893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346358293] [2023-11-26 11:59:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:35,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:35,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:59:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:35,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:59:35,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 11:59:35,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 11:59:35,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346358293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:35,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:35,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2023-11-26 11:59:35,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582787300] [2023-11-26 11:59:35,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:35,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:59:35,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:59:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:59:35,705 INFO L87 Difference]: Start difference. First operand 1507 states and 2137 transitions. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:36,984 INFO L93 Difference]: Finished difference Result 6282 states and 8735 transitions. [2023-11-26 11:59:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-26 11:59:36,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 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 58 [2023-11-26 11:59:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:37,022 INFO L225 Difference]: With dead ends: 6282 [2023-11-26 11:59:37,022 INFO L226 Difference]: Without dead ends: 6282 [2023-11-26 11:59:37,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=562, Invalid=1694, Unknown=0, NotChecked=0, Total=2256 [2023-11-26 11:59:37,025 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 404 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:37,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 624 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:59:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6282 states. [2023-11-26 11:59:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6282 to 4284. [2023-11-26 11:59:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 4273 states have (on average 1.4530774631406507) internal successors, (6209), 4283 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 6209 transitions. [2023-11-26 11:59:37,164 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 6209 transitions. Word has length 58 [2023-11-26 11:59:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:37,164 INFO L495 AbstractCegarLoop]: Abstraction has 4284 states and 6209 transitions. [2023-11-26 11:59:37,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 6209 transitions. [2023-11-26 11:59:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 11:59:37,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:37,167 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:37,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:59:37,374 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:37,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash -175746809, now seen corresponding path program 1 times [2023-11-26 11:59:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:37,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443924055] [2023-11-26 11:59:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:37,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:59:37,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:37,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443924055] [2023-11-26 11:59:37,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443924055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:37,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492392284] [2023-11-26 11:59:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:37,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:37,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:37,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:59:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:37,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:59:37,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-26 11:59:37,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-26 11:59:37,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492392284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:37,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:37,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-26 11:59:37,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144003430] [2023-11-26 11:59:37,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:37,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:59:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:59:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:37,924 INFO L87 Difference]: Start difference. First operand 4284 states and 6209 transitions. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:38,521 INFO L93 Difference]: Finished difference Result 5586 states and 7658 transitions. [2023-11-26 11:59:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 11:59:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 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 61 [2023-11-26 11:59:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:38,552 INFO L225 Difference]: With dead ends: 5586 [2023-11-26 11:59:38,552 INFO L226 Difference]: Without dead ends: 5586 [2023-11-26 11:59:38,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 11:59:38,553 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 282 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:38,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1265 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2023-11-26 11:59:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4880. [2023-11-26 11:59:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4880 states, 4869 states have (on average 1.4074758677346477) internal successors, (6853), 4879 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4880 states to 4880 states and 6853 transitions. [2023-11-26 11:59:38,692 INFO L78 Accepts]: Start accepts. Automaton has 4880 states and 6853 transitions. Word has length 61 [2023-11-26 11:59:38,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:38,692 INFO L495 AbstractCegarLoop]: Abstraction has 4880 states and 6853 transitions. [2023-11-26 11:59:38,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4880 states and 6853 transitions. [2023-11-26 11:59:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-26 11:59:38,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:38,695 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:38,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:38,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:38,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:38,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1446605301, now seen corresponding path program 1 times [2023-11-26 11:59:38,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:38,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937924619] [2023-11-26 11:59:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:38,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-26 11:59:39,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:39,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937924619] [2023-11-26 11:59:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937924619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:39,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7032562] [2023-11-26 11:59:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:39,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:39,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:39,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:59:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:39,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:59:39,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 11:59:39,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 103 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 11:59:39,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7032562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:39,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:39,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-11-26 11:59:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743037042] [2023-11-26 11:59:39,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:39,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:59:39,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:59:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:39,451 INFO L87 Difference]: Start difference. First operand 4880 states and 6853 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:39,967 INFO L93 Difference]: Finished difference Result 3977 states and 5291 transitions. [2023-11-26 11:59:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 11:59:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 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 62 [2023-11-26 11:59:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:39,990 INFO L225 Difference]: With dead ends: 3977 [2023-11-26 11:59:39,990 INFO L226 Difference]: Without dead ends: 3977 [2023-11-26 11:59:39,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 11:59:39,993 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 241 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:39,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 814 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2023-11-26 11:59:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 2672. [2023-11-26 11:59:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2661 states have (on average 1.3363397219090567) internal successors, (3556), 2671 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3556 transitions. [2023-11-26 11:59:40,078 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3556 transitions. Word has length 62 [2023-11-26 11:59:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:40,078 INFO L495 AbstractCegarLoop]: Abstraction has 2672 states and 3556 transitions. [2023-11-26 11:59:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3556 transitions. [2023-11-26 11:59:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 11:59:40,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:40,080 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:40,287 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:40,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1221625822, now seen corresponding path program 1 times [2023-11-26 11:59:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:40,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482757498] [2023-11-26 11:59:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-26 11:59:40,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:40,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482757498] [2023-11-26 11:59:40,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482757498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:40,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965842697] [2023-11-26 11:59:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:40,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:40,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:40,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:40,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:59:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:40,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:59:40,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 11:59:40,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 97 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 11:59:40,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965842697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:40,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:40,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2023-11-26 11:59:40,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687841110] [2023-11-26 11:59:40,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:40,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:59:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:59:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:59:40,842 INFO L87 Difference]: Start difference. First operand 2672 states and 3556 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:41,202 INFO L93 Difference]: Finished difference Result 2717 states and 3556 transitions. [2023-11-26 11:59:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:59:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2023-11-26 11:59:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:41,229 INFO L225 Difference]: With dead ends: 2717 [2023-11-26 11:59:41,235 INFO L226 Difference]: Without dead ends: 2717 [2023-11-26 11:59:41,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:59:41,236 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 103 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:41,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 619 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2023-11-26 11:59:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 1988. [2023-11-26 11:59:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1977 states have (on average 1.3373798684876075) internal successors, (2644), 1987 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2644 transitions. [2023-11-26 11:59:41,308 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2644 transitions. Word has length 63 [2023-11-26 11:59:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:41,309 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2644 transitions. [2023-11-26 11:59:41,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2644 transitions. [2023-11-26 11:59:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 11:59:41,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:41,311 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:41,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:41,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-26 11:59:41,519 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:41,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:41,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2122980990, now seen corresponding path program 1 times [2023-11-26 11:59:41,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:41,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060677870] [2023-11-26 11:59:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:41,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 11:59:41,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060677870] [2023-11-26 11:59:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060677870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62227347] [2023-11-26 11:59:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:41,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:41,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:41,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:41,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:59:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:41,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:41,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 11:59:41,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-26 11:59:41,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62227347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:41,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:41,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-26 11:59:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357115632] [2023-11-26 11:59:41,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:41,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:59:41,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:59:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:59:41,981 INFO L87 Difference]: Start difference. First operand 1988 states and 2644 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:42,102 INFO L93 Difference]: Finished difference Result 1984 states and 2613 transitions. [2023-11-26 11:59:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:59:42,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 63 [2023-11-26 11:59:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:42,116 INFO L225 Difference]: With dead ends: 1984 [2023-11-26 11:59:42,116 INFO L226 Difference]: Without dead ends: 1984 [2023-11-26 11:59:42,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:59:42,118 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:42,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 211 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2023-11-26 11:59:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1977. [2023-11-26 11:59:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1966 states have (on average 1.3280773143438453) internal successors, (2611), 1976 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2611 transitions. [2023-11-26 11:59:42,167 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2611 transitions. Word has length 63 [2023-11-26 11:59:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:42,167 INFO L495 AbstractCegarLoop]: Abstraction has 1977 states and 2611 transitions. [2023-11-26 11:59:42,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2611 transitions. [2023-11-26 11:59:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-26 11:59:42,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:42,169 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:42,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:42,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 11:59:42,377 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:42,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -974106542, now seen corresponding path program 1 times [2023-11-26 11:59:42,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:42,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949214629] [2023-11-26 11:59:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:42,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-26 11:59:42,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:42,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949214629] [2023-11-26 11:59:42,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949214629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:42,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708682155] [2023-11-26 11:59:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:42,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:42,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:42,634 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:42,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:59:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:42,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:59:42,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-26 11:59:43,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:43,301 INFO L378 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 7 treesize of output 5 [2023-11-26 11:59:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-26 11:59:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708682155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:43,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:43,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-11-26 11:59:43,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571348520] [2023-11-26 11:59:43,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:59:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:59:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:43,317 INFO L87 Difference]: Start difference. First operand 1977 states and 2611 transitions. Second operand has 13 states, 12 states have (on average 9.416666666666666) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:43,753 INFO L93 Difference]: Finished difference Result 3822 states and 4947 transitions. [2023-11-26 11:59:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:59:43,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 9.416666666666666) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 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 68 [2023-11-26 11:59:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:43,764 INFO L225 Difference]: With dead ends: 3822 [2023-11-26 11:59:43,764 INFO L226 Difference]: Without dead ends: 3822 [2023-11-26 11:59:43,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:59:43,765 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 610 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:43,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 410 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2023-11-26 11:59:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2841. [2023-11-26 11:59:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2830 states have (on average 1.3445229681978799) internal successors, (3805), 2840 states have internal predecessors, (3805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 3805 transitions. [2023-11-26 11:59:43,825 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 3805 transitions. Word has length 68 [2023-11-26 11:59:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:43,826 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 3805 transitions. [2023-11-26 11:59:43,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 9.416666666666666) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 3805 transitions. [2023-11-26 11:59:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-26 11:59:43,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:43,828 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:43,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:44,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 11:59:44,036 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:44,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:44,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1866491219, now seen corresponding path program 1 times [2023-11-26 11:59:44,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:44,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205373090] [2023-11-26 11:59:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:44,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-26 11:59:44,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:44,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205373090] [2023-11-26 11:59:44,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205373090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:44,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:59:44,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:59:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006261912] [2023-11-26 11:59:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:44,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:44,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:44,228 INFO L87 Difference]: Start difference. First operand 2841 states and 3805 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:44,356 INFO L93 Difference]: Finished difference Result 4489 states and 6061 transitions. [2023-11-26 11:59:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:59:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 87 [2023-11-26 11:59:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:44,365 INFO L225 Difference]: With dead ends: 4489 [2023-11-26 11:59:44,365 INFO L226 Difference]: Without dead ends: 4489 [2023-11-26 11:59:44,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:59:44,367 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:44,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 285 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:59:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4489 states. [2023-11-26 11:59:44,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4489 to 2967. [2023-11-26 11:59:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2956 states have (on average 1.3501353179972937) internal successors, (3991), 2966 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3991 transitions. [2023-11-26 11:59:44,446 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3991 transitions. Word has length 87 [2023-11-26 11:59:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:44,447 INFO L495 AbstractCegarLoop]: Abstraction has 2967 states and 3991 transitions. [2023-11-26 11:59:44,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3991 transitions. [2023-11-26 11:59:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-26 11:59:44,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:44,450 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-26 11:59:44,451 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:44,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1341743452, now seen corresponding path program 1 times [2023-11-26 11:59:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:44,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430641853] [2023-11-26 11:59:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 61 proven. 147 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-26 11:59:44,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:44,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430641853] [2023-11-26 11:59:44,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430641853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:44,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254737592] [2023-11-26 11:59:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:44,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:44,707 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:44,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:59:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:44,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:44,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-11-26 11:59:44,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:59:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254737592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:59:44,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:59:44,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-11-26 11:59:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491155208] [2023-11-26 11:59:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:59:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:59:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:59:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:44,954 INFO L87 Difference]: Start difference. First operand 2967 states and 3991 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:44,986 INFO L93 Difference]: Finished difference Result 3319 states and 4327 transitions. [2023-11-26 11:59:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:59:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 95 [2023-11-26 11:59:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:44,992 INFO L225 Difference]: With dead ends: 3319 [2023-11-26 11:59:44,992 INFO L226 Difference]: Without dead ends: 3319 [2023-11-26 11:59:44,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:59:44,995 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 48 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:44,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:59:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2023-11-26 11:59:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3003. [2023-11-26 11:59:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 2992 states have (on average 1.3245320855614973) internal successors, (3963), 3002 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 3963 transitions. [2023-11-26 11:59:45,048 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 3963 transitions. Word has length 95 [2023-11-26 11:59:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:45,048 INFO L495 AbstractCegarLoop]: Abstraction has 3003 states and 3963 transitions. [2023-11-26 11:59:45,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 3963 transitions. [2023-11-26 11:59:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-26 11:59:45,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:45,051 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:45,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:45,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-26 11:59:45,258 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:45,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1656693807, now seen corresponding path program 1 times [2023-11-26 11:59:45,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:45,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499037591] [2023-11-26 11:59:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:45,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-26 11:59:45,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499037591] [2023-11-26 11:59:45,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499037591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973669762] [2023-11-26 11:59:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:45,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:45,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:45,502 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:45,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:59:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:45,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:59:45,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-26 11:59:45,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-26 11:59:45,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973669762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:45,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:45,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2023-11-26 11:59:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522643012] [2023-11-26 11:59:45,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:45,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:59:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:59:45,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:59:45,939 INFO L87 Difference]: Start difference. First operand 3003 states and 3963 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:46,309 INFO L93 Difference]: Finished difference Result 2802 states and 3421 transitions. [2023-11-26 11:59:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:59:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 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 97 [2023-11-26 11:59:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:46,315 INFO L225 Difference]: With dead ends: 2802 [2023-11-26 11:59:46,315 INFO L226 Difference]: Without dead ends: 2802 [2023-11-26 11:59:46,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:59:46,316 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 163 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:46,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1344 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2023-11-26 11:59:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2043. [2023-11-26 11:59:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2033 states have (on average 1.2395474667978357) internal successors, (2520), 2042 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 2520 transitions. [2023-11-26 11:59:46,355 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 2520 transitions. Word has length 97 [2023-11-26 11:59:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:46,355 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 2520 transitions. [2023-11-26 11:59:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 2520 transitions. [2023-11-26 11:59:46,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-26 11:59:46,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:46,360 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:46,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:46,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 11:59:46,572 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:46,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1917738987, now seen corresponding path program 1 times [2023-11-26 11:59:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:46,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267242365] [2023-11-26 11:59:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 117 proven. 8 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-26 11:59:46,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267242365] [2023-11-26 11:59:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267242365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436118038] [2023-11-26 11:59:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:46,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:46,694 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:46,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:59:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:46,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:59:46,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:46,918 INFO L378 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 [2023-11-26 11:59:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:47,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:47,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436118038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:47,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:47,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 5 [2023-11-26 11:59:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714353726] [2023-11-26 11:59:47,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:47,198 INFO L87 Difference]: Start difference. First operand 2043 states and 2520 transitions. Second operand has 6 states, 5 states have (on average 17.6) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:47,534 INFO L93 Difference]: Finished difference Result 2884 states and 3504 transitions. [2023-11-26 11:59:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:59:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 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 107 [2023-11-26 11:59:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:47,540 INFO L225 Difference]: With dead ends: 2884 [2023-11-26 11:59:47,540 INFO L226 Difference]: Without dead ends: 2884 [2023-11-26 11:59:47,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:47,541 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 287 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:47,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 362 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:59:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2023-11-26 11:59:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2044. [2023-11-26 11:59:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2035 states have (on average 1.2398034398034399) internal successors, (2523), 2043 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2523 transitions. [2023-11-26 11:59:47,576 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2523 transitions. Word has length 107 [2023-11-26 11:59:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:47,577 INFO L495 AbstractCegarLoop]: Abstraction has 2044 states and 2523 transitions. [2023-11-26 11:59:47,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.6) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2523 transitions. [2023-11-26 11:59:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-26 11:59:47,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:47,580 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:47,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:47,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 11:59:47,787 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:47,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:47,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1917738988, now seen corresponding path program 1 times [2023-11-26 11:59:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:47,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871473178] [2023-11-26 11:59:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:48,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:48,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871473178] [2023-11-26 11:59:48,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871473178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:48,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447583718] [2023-11-26 11:59:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:48,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:48,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:48,316 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:48,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 11:59:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:48,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:59:48,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:48,519 INFO L378 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 8 treesize of output 1 [2023-11-26 11:59:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:48,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447583718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:49,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:49,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-11-26 11:59:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993946807] [2023-11-26 11:59:49,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:49,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:59:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:59:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:59:49,345 INFO L87 Difference]: Start difference. First operand 2044 states and 2523 transitions. Second operand has 14 states, 13 states have (on average 12.76923076923077) internal successors, (166), 14 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:50,269 INFO L93 Difference]: Finished difference Result 5871 states and 7186 transitions. [2023-11-26 11:59:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 11:59:50,270 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 12.76923076923077) internal successors, (166), 14 states have internal predecessors, (166), 0 states have call successors, (0), 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 107 [2023-11-26 11:59:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:50,279 INFO L225 Difference]: With dead ends: 5871 [2023-11-26 11:59:50,279 INFO L226 Difference]: Without dead ends: 5871 [2023-11-26 11:59:50,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:59:50,280 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1279 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:50,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 679 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:59:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2023-11-26 11:59:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 2157. [2023-11-26 11:59:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2148 states have (on average 1.2458100558659218) internal successors, (2676), 2156 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 2676 transitions. [2023-11-26 11:59:50,336 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 2676 transitions. Word has length 107 [2023-11-26 11:59:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:50,337 INFO L495 AbstractCegarLoop]: Abstraction has 2157 states and 2676 transitions. [2023-11-26 11:59:50,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 12.76923076923077) internal successors, (166), 14 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 2676 transitions. [2023-11-26 11:59:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-26 11:59:50,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:50,340 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:50,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:50,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 11:59:50,546 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:50,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:50,547 INFO L85 PathProgramCache]: Analyzing trace with hash -679634941, now seen corresponding path program 1 times [2023-11-26 11:59:50,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:50,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714387028] [2023-11-26 11:59:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:50,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 28 proven. 213 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-26 11:59:50,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:50,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714387028] [2023-11-26 11:59:50,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714387028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:50,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272432706] [2023-11-26 11:59:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:50,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:50,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:50,826 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:50,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-26 11:59:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:51,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:59:51,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:51,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:51,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272432706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:51,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:51,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2023-11-26 11:59:51,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197018716] [2023-11-26 11:59:51,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:51,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:59:51,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:59:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:59:51,295 INFO L87 Difference]: Start difference. First operand 2157 states and 2676 transitions. Second operand has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:52,408 INFO L93 Difference]: Finished difference Result 4817 states and 5879 transitions. [2023-11-26 11:59:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 11:59:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 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 108 [2023-11-26 11:59:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:52,417 INFO L225 Difference]: With dead ends: 4817 [2023-11-26 11:59:52,417 INFO L226 Difference]: Without dead ends: 4817 [2023-11-26 11:59:52,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=512, Invalid=1468, Unknown=0, NotChecked=0, Total=1980 [2023-11-26 11:59:52,420 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 584 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:52,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 986 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:59:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4817 states. [2023-11-26 11:59:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4817 to 2157. [2023-11-26 11:59:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2148 states have (on average 1.2425512104283054) internal successors, (2669), 2156 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 2669 transitions. [2023-11-26 11:59:52,469 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 2669 transitions. Word has length 108 [2023-11-26 11:59:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:52,470 INFO L495 AbstractCegarLoop]: Abstraction has 2157 states and 2669 transitions. [2023-11-26 11:59:52,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 2669 transitions. [2023-11-26 11:59:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-26 11:59:52,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:52,473 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:52,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-26 11:59:52,680 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:52,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 406220416, now seen corresponding path program 1 times [2023-11-26 11:59:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326642634] [2023-11-26 11:59:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:52,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326642634] [2023-11-26 11:59:52,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326642634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372434780] [2023-11-26 11:59:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:52,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:52,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:52,926 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:52,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-26 11:59:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:53,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:59:53,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:53,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372434780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:53,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:53,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-26 11:59:53,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301014406] [2023-11-26 11:59:53,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:59:53,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:59:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:59:53,459 INFO L87 Difference]: Start difference. First operand 2157 states and 2669 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:59:53,748 INFO L93 Difference]: Finished difference Result 4148 states and 5101 transitions. [2023-11-26 11:59:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:59:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 109 [2023-11-26 11:59:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:59:53,756 INFO L225 Difference]: With dead ends: 4148 [2023-11-26 11:59:53,756 INFO L226 Difference]: Without dead ends: 4148 [2023-11-26 11:59:53,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 219 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:59:53,757 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 467 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:59:53,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 219 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:59:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2023-11-26 11:59:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 2158. [2023-11-26 11:59:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2149 states have (on average 1.2424383434155422) internal successors, (2670), 2157 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 2670 transitions. [2023-11-26 11:59:53,798 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 2670 transitions. Word has length 109 [2023-11-26 11:59:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:59:53,798 INFO L495 AbstractCegarLoop]: Abstraction has 2158 states and 2670 transitions. [2023-11-26 11:59:53,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:59:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 2670 transitions. [2023-11-26 11:59:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-26 11:59:53,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:59:53,802 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:59:53,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-26 11:59:54,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:54,009 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:59:54,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:59:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1505248649, now seen corresponding path program 1 times [2023-11-26 11:59:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:59:54,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62044815] [2023-11-26 11:59:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:54,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:59:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 41 proven. 275 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 11:59:55,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:59:55,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62044815] [2023-11-26 11:59:55,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62044815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:59:55,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359675759] [2023-11-26 11:59:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:59:55,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:59:55,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:59:55,785 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:59:55,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-26 11:59:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:59:55,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 11:59:55,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:59:56,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:56,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 11:59:56,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:59:56,677 INFO L378 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 17 treesize of output 15 [2023-11-26 11:59:56,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:59:56,685 INFO L378 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 17 treesize of output 15 [2023-11-26 11:59:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:56,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:59:56,801 INFO L378 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 10 [2023-11-26 11:59:56,805 INFO L378 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 18 treesize of output 16 [2023-11-26 11:59:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 11:59:57,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359675759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:59:57,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:59:57,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 20 [2023-11-26 11:59:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249842361] [2023-11-26 11:59:57,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:59:57,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:59:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:59:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:59:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:59:57,339 INFO L87 Difference]: Start difference. First operand 2158 states and 2670 transitions. Second operand has 21 states, 21 states have (on average 7.523809523809524) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:00,431 INFO L93 Difference]: Finished difference Result 6474 states and 7816 transitions. [2023-11-26 12:00:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-26 12:00:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.523809523809524) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 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 112 [2023-11-26 12:00:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:00,443 INFO L225 Difference]: With dead ends: 6474 [2023-11-26 12:00:00,443 INFO L226 Difference]: Without dead ends: 6474 [2023-11-26 12:00:00,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=846, Invalid=3186, Unknown=0, NotChecked=0, Total=4032 [2023-11-26 12:00:00,446 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 998 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:00,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 1214 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 12:00:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2023-11-26 12:00:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 2670. [2023-11-26 12:00:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 2661 states have (on average 1.2401352874859075) internal successors, (3300), 2669 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 3300 transitions. [2023-11-26 12:00:00,502 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 3300 transitions. Word has length 112 [2023-11-26 12:00:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:00,502 INFO L495 AbstractCegarLoop]: Abstraction has 2670 states and 3300 transitions. [2023-11-26 12:00:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.523809523809524) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 3300 transitions. [2023-11-26 12:00:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-26 12:00:00,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:00,506 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:00,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:00,713 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 12:00:00,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash 581930743, now seen corresponding path program 1 times [2023-11-26 12:00:00,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:00,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652807808] [2023-11-26 12:00:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 12:00:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652807808] [2023-11-26 12:00:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652807808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534638809] [2023-11-26 12:00:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:01,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:01,080 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:01,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-26 12:00:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:01,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 12:00:01,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:01,480 INFO L378 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 13 treesize of output 9 [2023-11-26 12:00:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 12:00:01,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:01,759 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_~x1~0.base_30 Int)) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| v_~x1~0.base_30 0)) (not (= (select |c_#valid| v_~x1~0.base_30) 0)))) is different from false [2023-11-26 12:00:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 97 trivial. 48 not checked. [2023-11-26 12:00:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534638809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:01,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:01,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2023-11-26 12:00:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831910156] [2023-11-26 12:00:01,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:01,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 12:00:01,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:01,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 12:00:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2023-11-26 12:00:01,796 INFO L87 Difference]: Start difference. First operand 2670 states and 3300 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:02,334 INFO L93 Difference]: Finished difference Result 5847 states and 7181 transitions. [2023-11-26 12:00:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:00:02,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 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 113 [2023-11-26 12:00:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:02,344 INFO L225 Difference]: With dead ends: 5847 [2023-11-26 12:00:02,345 INFO L226 Difference]: Without dead ends: 5831 [2023-11-26 12:00:02,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=218, Unknown=1, NotChecked=32, Total=342 [2023-11-26 12:00:02,346 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 370 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:02,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 514 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 280 Invalid, 0 Unknown, 372 Unchecked, 0.4s Time] [2023-11-26 12:00:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2023-11-26 12:00:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 4364. [2023-11-26 12:00:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4355 states have (on average 1.2390355912743973) internal successors, (5396), 4363 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 5396 transitions. [2023-11-26 12:00:02,413 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 5396 transitions. Word has length 113 [2023-11-26 12:00:02,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:02,413 INFO L495 AbstractCegarLoop]: Abstraction has 4364 states and 5396 transitions. [2023-11-26 12:00:02,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 5396 transitions. [2023-11-26 12:00:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-26 12:00:02,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:02,417 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:02,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:02,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-26 12:00:02,624 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 12:00:02,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash 229534506, now seen corresponding path program 1 times [2023-11-26 12:00:02,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:02,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483183273] [2023-11-26 12:00:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:02,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 84 proven. 313 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 12:00:03,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:03,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483183273] [2023-11-26 12:00:03,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483183273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:03,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17502198] [2023-11-26 12:00:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:03,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:03,393 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:03,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2b8d3f4-4f99-4a89-be88-41c0ff51f3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-26 12:00:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:03,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 12:00:03,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:03,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:00:03,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:00:04,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:04,042 INFO L378 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 17 treesize of output 15 [2023-11-26 12:00:04,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:04,051 INFO L378 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 17 treesize of output 15 [2023-11-26 12:00:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 80 proven. 317 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 12:00:04,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:05,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 12:00:05,140 INFO L378 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 20 treesize of output 16 [2023-11-26 12:00:05,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 12:00:05,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 12:00:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 76 proven. 321 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 12:00:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17502198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:05,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:05,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-11-26 12:00:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066791902] [2023-11-26 12:00:05,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:00:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:05,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:00:05,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:00:05,508 INFO L87 Difference]: Start difference. First operand 4364 states and 5396 transitions. Second operand has 22 states, 22 states have (on average 9.590909090909092) internal successors, (211), 21 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:08,833 INFO L93 Difference]: Finished difference Result 24076 states and 28686 transitions. [2023-11-26 12:00:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-26 12:00:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 9.590909090909092) internal successors, (211), 21 states have internal predecessors, (211), 0 states have call successors, (0), 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 113 [2023-11-26 12:00:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:08,875 INFO L225 Difference]: With dead ends: 24076 [2023-11-26 12:00:08,876 INFO L226 Difference]: Without dead ends: 24076 [2023-11-26 12:00:08,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1033, Invalid=5129, Unknown=0, NotChecked=0, Total=6162 [2023-11-26 12:00:08,879 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 2351 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2351 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:08,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2351 Valid, 2030 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 12:00:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24076 states.