./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0217.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_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya --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 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:58:09,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:58:09,155 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 06:58:09,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:58:09,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:58:09,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:58:09,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:58:09,189 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:58:09,190 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:58:09,190 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:58:09,191 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:58:09,191 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:58:09,192 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:58:09,193 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:58:09,193 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:58:09,194 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:58:09,194 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:58:09,195 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:58:09,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:58:09,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:58:09,196 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:58:09,197 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:58:09,197 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:58:09,198 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:58:09,198 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:58:09,199 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:58:09,199 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:58:09,200 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:58:09,200 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:58:09,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:58:09,201 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:58:09,201 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:58:09,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:58:09,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:58:09,203 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:58:09,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:58:09,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:58:09,204 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:58:09,204 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:58:09,204 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:58:09,204 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:58:09,205 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_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2023-11-29 06:58:09,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:58:09,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:58:09,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:58:09,482 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:58:09,483 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:58:09,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/memsafety/test-0217.i [2023-11-29 06:58:12,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:58:12,620 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:58:12,621 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/sv-benchmarks/c/memsafety/test-0217.i [2023-11-29 06:58:12,638 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data/e1a4241f2/74bd2e0a77d44ca5a5a68d875bbd8ee9/FLAG1cec09214 [2023-11-29 06:58:12,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data/e1a4241f2/74bd2e0a77d44ca5a5a68d875bbd8ee9 [2023-11-29 06:58:12,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:58:12,938 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:58:12,939 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:58:12,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:58:12,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:58:12,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:58:12" (1/1) ... [2023-11-29 06:58:12,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfb05c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:12, skipping insertion in model container [2023-11-29 06:58:12,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:58:12" (1/1) ... [2023-11-29 06:58:13,014 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:58:13,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:58:13,440 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:58:13,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:58:13,534 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:58:13,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13 WrapperNode [2023-11-29 06:58:13,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:58:13,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:58:13,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:58:13,535 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:58:13,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,562 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,591 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 215 [2023-11-29 06:58:13,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:58:13,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:58:13,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:58:13,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:58:13,605 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,641 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 11 writes are split as follows [0, 11]. [2023-11-29 06:58:13,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,656 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,661 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,664 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:58:13,674 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:58:13,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:58:13,674 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:58:13,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (1/1) ... [2023-11-29 06:58:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:58:13,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:13,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:58:13,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:58:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-11-29 06:58:13,742 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-11-29 06:58:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:58:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:58:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:58:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:58:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 06:58:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 06:58:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 06:58:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 06:58:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:58:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 06:58:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 06:58:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:58:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:58:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:58:13,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:58:13,885 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:58:13,887 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:58:14,328 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:58:14,389 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:58:14,390 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 06:58:14,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:58:14 BoogieIcfgContainer [2023-11-29 06:58:14,390 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:58:14,394 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:58:14,394 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:58:14,397 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:58:14,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:58:12" (1/3) ... [2023-11-29 06:58:14,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69df2237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:58:14, skipping insertion in model container [2023-11-29 06:58:14,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:58:13" (2/3) ... [2023-11-29 06:58:14,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69df2237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:58:14, skipping insertion in model container [2023-11-29 06:58:14,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:58:14" (3/3) ... [2023-11-29 06:58:14,401 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2023-11-29 06:58:14,444 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:58:14,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-11-29 06:58:14,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:58:14,504 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;@753ab68f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:58:14,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-11-29 06:58:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 77 states have (on average 2.1948051948051948) internal successors, (169), 144 states have internal predecessors, (169), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:58:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 06:58:14,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:14,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:58:14,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:14,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash 326466752, now seen corresponding path program 1 times [2023-11-29 06:58:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:14,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136443026] [2023-11-29 06:58:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136443026] [2023-11-29 06:58:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136443026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:14,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:14,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:58:14,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346578364] [2023-11-29 06:58:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:14,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:58:14,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:58:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:58:14,730 INFO L87 Difference]: Start difference. First operand has 148 states, 77 states have (on average 2.1948051948051948) internal successors, (169), 144 states have internal predecessors, (169), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:14,798 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2023-11-29 06:58:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:58:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-29 06:58:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:14,810 INFO L225 Difference]: With dead ends: 148 [2023-11-29 06:58:14,810 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 06:58:14,811 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 [2023-11-29 06:58:14,815 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:14,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:58:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 06:58:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-29 06:58:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 77 states have (on average 2.103896103896104) internal successors, (162), 143 states have internal predecessors, (162), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:58:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 166 transitions. [2023-11-29 06:58:14,862 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 166 transitions. Word has length 5 [2023-11-29 06:58:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:14,862 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 166 transitions. [2023-11-29 06:58:14,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 166 transitions. [2023-11-29 06:58:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 06:58:14,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:14,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 06:58:14,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:58:14,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:14,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:14,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1299860234, now seen corresponding path program 1 times [2023-11-29 06:58:14,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:14,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026118942] [2023-11-29 06:58:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:14,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026118942] [2023-11-29 06:58:14,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026118942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:14,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:14,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:58:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281874702] [2023-11-29 06:58:14,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:14,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:58:14,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:58:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:58:14,998 INFO L87 Difference]: Start difference. First operand 147 states and 166 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2023-11-29 06:58:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:15,255 INFO L93 Difference]: Finished difference Result 287 states and 324 transitions. [2023-11-29 06:58:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:58:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2023-11-29 06:58:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:15,259 INFO L225 Difference]: With dead ends: 287 [2023-11-29 06:58:15,259 INFO L226 Difference]: Without dead ends: 287 [2023-11-29 06:58:15,260 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 [2023-11-29 06:58:15,262 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 149 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:15,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 196 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-29 06:58:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 199. [2023-11-29 06:58:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 2.0793650793650795) internal successors, (262), 192 states have internal predecessors, (262), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:58:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 270 transitions. [2023-11-29 06:58:15,289 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 270 transitions. Word has length 6 [2023-11-29 06:58:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:15,289 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 270 transitions. [2023-11-29 06:58:15,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2023-11-29 06:58:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 270 transitions. [2023-11-29 06:58:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 06:58:15,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:15,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 06:58:15,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:58:15,291 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:15,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1299860235, now seen corresponding path program 1 times [2023-11-29 06:58:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:15,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511678253] [2023-11-29 06:58:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:15,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511678253] [2023-11-29 06:58:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511678253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:15,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:15,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:58:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341984318] [2023-11-29 06:58:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:15,440 INFO L87 Difference]: Start difference. First operand 199 states and 270 transitions. Second operand has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 06:58:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:15,647 INFO L93 Difference]: Finished difference Result 325 states and 419 transitions. [2023-11-29 06:58:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) 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 [2023-11-29 06:58:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:15,650 INFO L225 Difference]: With dead ends: 325 [2023-11-29 06:58:15,650 INFO L226 Difference]: Without dead ends: 325 [2023-11-29 06:58:15,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:15,652 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 122 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:15,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 295 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-29 06:58:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 263. [2023-11-29 06:58:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 184 states have (on average 2.010869565217391) internal successors, (370), 252 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:58:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 386 transitions. [2023-11-29 06:58:15,676 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 386 transitions. Word has length 6 [2023-11-29 06:58:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:15,677 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 386 transitions. [2023-11-29 06:58:15,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 06:58:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 386 transitions. [2023-11-29 06:58:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 06:58:15,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:15,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 06:58:15,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:58:15,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:15,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1299860297, now seen corresponding path program 1 times [2023-11-29 06:58:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954191449] [2023-11-29 06:58:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:15,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:15,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:15,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954191449] [2023-11-29 06:58:15,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954191449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:15,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:15,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:58:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495836785] [2023-11-29 06:58:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:15,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:15,781 INFO L87 Difference]: Start difference. First operand 263 states and 386 transitions. Second operand has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 06:58:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:15,968 INFO L93 Difference]: Finished difference Result 324 states and 417 transitions. [2023-11-29 06:58:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) 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 [2023-11-29 06:58:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:15,971 INFO L225 Difference]: With dead ends: 324 [2023-11-29 06:58:15,972 INFO L226 Difference]: Without dead ends: 324 [2023-11-29 06:58:15,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:15,974 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 106 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:15,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 307 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-29 06:58:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 263. [2023-11-29 06:58:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 184 states have (on average 2.010869565217391) internal successors, (370), 252 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 06:58:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 386 transitions. [2023-11-29 06:58:16,014 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 386 transitions. Word has length 6 [2023-11-29 06:58:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:16,014 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 386 transitions. [2023-11-29 06:58:16,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 06:58:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 386 transitions. [2023-11-29 06:58:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 06:58:16,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:16,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:16,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:58:16,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:16,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -669739456, now seen corresponding path program 1 times [2023-11-29 06:58:16,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:16,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358707990] [2023-11-29 06:58:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358707990] [2023-11-29 06:58:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358707990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647043052] [2023-11-29 06:58:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:16,164 INFO L87 Difference]: Start difference. First operand 263 states and 386 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 06:58:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:16,375 INFO L93 Difference]: Finished difference Result 393 states and 547 transitions. [2023-11-29 06:58:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:58:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2023-11-29 06:58:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:16,380 INFO L225 Difference]: With dead ends: 393 [2023-11-29 06:58:16,381 INFO L226 Difference]: Without dead ends: 393 [2023-11-29 06:58:16,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:16,382 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 131 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:16,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 487 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-29 06:58:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 300. [2023-11-29 06:58:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 218 states have (on average 1.981651376146789) internal successors, (432), 287 states have internal predecessors, (432), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 06:58:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 452 transitions. [2023-11-29 06:58:16,400 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 452 transitions. Word has length 8 [2023-11-29 06:58:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:16,400 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 452 transitions. [2023-11-29 06:58:16,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 06:58:16,401 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 452 transitions. [2023-11-29 06:58:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 06:58:16,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:16,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:16,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:58:16,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:16,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash -669679874, now seen corresponding path program 1 times [2023-11-29 06:58:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:16,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044165113] [2023-11-29 06:58:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:16,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044165113] [2023-11-29 06:58:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044165113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:16,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:16,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:16,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345710416] [2023-11-29 06:58:16,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:16,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:16,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:16,510 INFO L87 Difference]: Start difference. First operand 300 states and 452 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 06:58:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:16,717 INFO L93 Difference]: Finished difference Result 384 states and 537 transitions. [2023-11-29 06:58:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:58:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2023-11-29 06:58:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:16,721 INFO L225 Difference]: With dead ends: 384 [2023-11-29 06:58:16,721 INFO L226 Difference]: Without dead ends: 384 [2023-11-29 06:58:16,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:16,722 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 113 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:16,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 523 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-29 06:58:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 299. [2023-11-29 06:58:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 217 states have (on average 1.9861751152073732) internal successors, (431), 286 states have internal predecessors, (431), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 06:58:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 451 transitions. [2023-11-29 06:58:16,735 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 451 transitions. Word has length 8 [2023-11-29 06:58:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:16,735 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 451 transitions. [2023-11-29 06:58:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 06:58:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 451 transitions. [2023-11-29 06:58:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 06:58:16,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:16,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:16,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:58:16,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:16,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash 712912086, now seen corresponding path program 1 times [2023-11-29 06:58:16,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:16,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201636463] [2023-11-29 06:58:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:16,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201636463] [2023-11-29 06:58:16,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201636463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:16,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:16,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:58:16,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244427287] [2023-11-29 06:58:16,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:16,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:58:16,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:58:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:58:16,760 INFO L87 Difference]: Start difference. First operand 299 states and 451 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2023-11-29 06:58:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:16,882 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2023-11-29 06:58:16,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:58:16,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2023-11-29 06:58:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:16,885 INFO L225 Difference]: With dead ends: 347 [2023-11-29 06:58:16,885 INFO L226 Difference]: Without dead ends: 341 [2023-11-29 06:58:16,885 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 [2023-11-29 06:58:16,886 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 59 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:16,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 224 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-29 06:58:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 296. [2023-11-29 06:58:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 214 states have (on average 1.9906542056074767) internal successors, (426), 283 states have internal predecessors, (426), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 06:58:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 446 transitions. [2023-11-29 06:58:16,897 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 446 transitions. Word has length 9 [2023-11-29 06:58:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:16,898 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 446 transitions. [2023-11-29 06:58:16,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2023-11-29 06:58:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 446 transitions. [2023-11-29 06:58:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 06:58:16,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:16,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:16,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:58:16,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:16,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash 895737773, now seen corresponding path program 1 times [2023-11-29 06:58:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:16,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225353360] [2023-11-29 06:58:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:16,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:58:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:16,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:16,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225353360] [2023-11-29 06:58:16,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225353360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:16,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:16,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:16,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158976731] [2023-11-29 06:58:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:16,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:16,971 INFO L87 Difference]: Start difference. First operand 296 states and 446 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:17,243 INFO L93 Difference]: Finished difference Result 398 states and 535 transitions. [2023-11-29 06:58:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-29 06:58:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:17,247 INFO L225 Difference]: With dead ends: 398 [2023-11-29 06:58:17,247 INFO L226 Difference]: Without dead ends: 398 [2023-11-29 06:58:17,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:17,248 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 153 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:17,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 283 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-29 06:58:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 302. [2023-11-29 06:58:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 220 states have (on average 1.9636363636363636) internal successors, (432), 289 states have internal predecessors, (432), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 06:58:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 452 transitions. [2023-11-29 06:58:17,265 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 452 transitions. Word has length 14 [2023-11-29 06:58:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:17,265 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 452 transitions. [2023-11-29 06:58:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 452 transitions. [2023-11-29 06:58:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 06:58:17,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:17,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:17,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:58:17,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:17,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash 895737774, now seen corresponding path program 1 times [2023-11-29 06:58:17,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:17,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982243878] [2023-11-29 06:58:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:17,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:17,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:58:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:17,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:17,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982243878] [2023-11-29 06:58:17,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982243878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:17,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:17,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:17,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456370491] [2023-11-29 06:58:17,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:17,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:17,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:17,384 INFO L87 Difference]: Start difference. First operand 302 states and 452 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:17,609 INFO L93 Difference]: Finished difference Result 344 states and 458 transitions. [2023-11-29 06:58:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-29 06:58:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:17,613 INFO L225 Difference]: With dead ends: 344 [2023-11-29 06:58:17,613 INFO L226 Difference]: Without dead ends: 344 [2023-11-29 06:58:17,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:17,614 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 96 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:17,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 355 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-29 06:58:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 302. [2023-11-29 06:58:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 220 states have (on average 1.9227272727272726) internal successors, (423), 289 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 06:58:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 443 transitions. [2023-11-29 06:58:17,629 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 443 transitions. Word has length 14 [2023-11-29 06:58:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:17,630 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 443 transitions. [2023-11-29 06:58:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 443 transitions. [2023-11-29 06:58:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 06:58:17,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:17,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:17,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:58:17,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:17,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1806038072, now seen corresponding path program 1 times [2023-11-29 06:58:17,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826839715] [2023-11-29 06:58:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:17,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826839715] [2023-11-29 06:58:17,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826839715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:17,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:17,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:17,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328922010] [2023-11-29 06:58:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:17,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:17,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:17,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:17,777 INFO L87 Difference]: Start difference. First operand 302 states and 443 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:18,087 INFO L93 Difference]: Finished difference Result 421 states and 557 transitions. [2023-11-29 06:58:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:58:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 06:58:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:18,091 INFO L225 Difference]: With dead ends: 421 [2023-11-29 06:58:18,091 INFO L226 Difference]: Without dead ends: 421 [2023-11-29 06:58:18,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:18,092 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 334 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:18,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 270 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:58:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-29 06:58:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 299. [2023-11-29 06:58:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 221 states have (on average 1.8868778280542986) internal successors, (417), 286 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 06:58:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 437 transitions. [2023-11-29 06:58:18,106 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 437 transitions. Word has length 16 [2023-11-29 06:58:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:18,107 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 437 transitions. [2023-11-29 06:58:18,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 437 transitions. [2023-11-29 06:58:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 06:58:18,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:18,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:18,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:58:18,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:18,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1806038073, now seen corresponding path program 1 times [2023-11-29 06:58:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:18,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154594226] [2023-11-29 06:58:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:18,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:18,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154594226] [2023-11-29 06:58:18,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154594226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:18,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:18,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:58:18,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623890039] [2023-11-29 06:58:18,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:58:18,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:18,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:58:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:18,381 INFO L87 Difference]: Start difference. First operand 299 states and 437 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:19,005 INFO L93 Difference]: Finished difference Result 486 states and 634 transitions. [2023-11-29 06:58:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:58:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 06:58:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:19,009 INFO L225 Difference]: With dead ends: 486 [2023-11-29 06:58:19,009 INFO L226 Difference]: Without dead ends: 486 [2023-11-29 06:58:19,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:58:19,010 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 280 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:19,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 452 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-29 06:58:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 326. [2023-11-29 06:58:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 246 states have (on average 1.8739837398373984) internal successors, (461), 312 states have internal predecessors, (461), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-29 06:58:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 485 transitions. [2023-11-29 06:58:19,027 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 485 transitions. Word has length 16 [2023-11-29 06:58:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:19,027 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 485 transitions. [2023-11-29 06:58:19,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 485 transitions. [2023-11-29 06:58:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 06:58:19,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:19,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 06:58:19,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:19,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1416390, now seen corresponding path program 1 times [2023-11-29 06:58:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756469020] [2023-11-29 06:58:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:19,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:19,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756469020] [2023-11-29 06:58:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756469020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:19,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:19,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:58:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953213440] [2023-11-29 06:58:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:19,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:19,116 INFO L87 Difference]: Start difference. First operand 326 states and 485 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:19,243 INFO L93 Difference]: Finished difference Result 416 states and 618 transitions. [2023-11-29 06:58:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:58:19,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 06:58:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:19,247 INFO L225 Difference]: With dead ends: 416 [2023-11-29 06:58:19,247 INFO L226 Difference]: Without dead ends: 416 [2023-11-29 06:58:19,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:58:19,248 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 107 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:19,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 888 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-29 06:58:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 336. [2023-11-29 06:58:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 253 states have (on average 1.8458498023715415) internal successors, (467), 321 states have internal predecessors, (467), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 497 transitions. [2023-11-29 06:58:19,263 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 497 transitions. Word has length 16 [2023-11-29 06:58:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:19,263 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 497 transitions. [2023-11-29 06:58:19,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 497 transitions. [2023-11-29 06:58:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 06:58:19,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:19,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:19,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 06:58:19,265 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:19,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -43852513, now seen corresponding path program 1 times [2023-11-29 06:58:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:19,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022136179] [2023-11-29 06:58:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:19,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:19,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022136179] [2023-11-29 06:58:19,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022136179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:19,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:19,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 06:58:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583548386] [2023-11-29 06:58:19,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:58:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:58:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:58:19,590 INFO L87 Difference]: Start difference. First operand 336 states and 497 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:20,253 INFO L93 Difference]: Finished difference Result 508 states and 671 transitions. [2023-11-29 06:58:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:58:20,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-29 06:58:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:20,258 INFO L225 Difference]: With dead ends: 508 [2023-11-29 06:58:20,258 INFO L226 Difference]: Without dead ends: 508 [2023-11-29 06:58:20,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:58:20,259 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 346 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:20,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 513 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-29 06:58:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 333. [2023-11-29 06:58:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 250 states have (on average 1.848) internal successors, (462), 318 states have internal predecessors, (462), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 492 transitions. [2023-11-29 06:58:20,273 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 492 transitions. Word has length 17 [2023-11-29 06:58:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:20,274 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 492 transitions. [2023-11-29 06:58:20,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 492 transitions. [2023-11-29 06:58:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:58:20,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:20,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:20,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 06:58:20,275 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:20,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash 608544403, now seen corresponding path program 1 times [2023-11-29 06:58:20,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:20,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043963367] [2023-11-29 06:58:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:20,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:58:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:20,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043963367] [2023-11-29 06:58:20,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043963367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:20,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:20,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:58:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153488646] [2023-11-29 06:58:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:20,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:20,537 INFO L87 Difference]: Start difference. First operand 333 states and 492 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:20,846 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2023-11-29 06:58:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:58:20,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-29 06:58:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:20,850 INFO L225 Difference]: With dead ends: 415 [2023-11-29 06:58:20,850 INFO L226 Difference]: Without dead ends: 415 [2023-11-29 06:58:20,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:58:20,851 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 94 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:20,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 649 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-29 06:58:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 327. [2023-11-29 06:58:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 244 states have (on average 1.848360655737705) internal successors, (451), 312 states have internal predecessors, (451), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 481 transitions. [2023-11-29 06:58:20,865 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 481 transitions. Word has length 18 [2023-11-29 06:58:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:20,865 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 481 transitions. [2023-11-29 06:58:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 481 transitions. [2023-11-29 06:58:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 06:58:20,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:20,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:20,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 06:58:20,867 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:20,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:20,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1685373121, now seen corresponding path program 1 times [2023-11-29 06:58:20,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:20,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863211465] [2023-11-29 06:58:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:20,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:20,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:58:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:20,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:20,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863211465] [2023-11-29 06:58:20,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863211465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:20,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:20,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394958754] [2023-11-29 06:58:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:20,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:20,932 INFO L87 Difference]: Start difference. First operand 327 states and 481 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:21,169 INFO L93 Difference]: Finished difference Result 414 states and 554 transitions. [2023-11-29 06:58:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-29 06:58:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:21,172 INFO L225 Difference]: With dead ends: 414 [2023-11-29 06:58:21,172 INFO L226 Difference]: Without dead ends: 414 [2023-11-29 06:58:21,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:21,173 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 170 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:21,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 290 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-29 06:58:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 343. [2023-11-29 06:58:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 260 states have (on average 1.873076923076923) internal successors, (487), 328 states have internal predecessors, (487), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 517 transitions. [2023-11-29 06:58:21,188 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 517 transitions. Word has length 19 [2023-11-29 06:58:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:21,188 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 517 transitions. [2023-11-29 06:58:21,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 517 transitions. [2023-11-29 06:58:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 06:58:21,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:21,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:21,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 06:58:21,190 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:21,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1685373122, now seen corresponding path program 1 times [2023-11-29 06:58:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:21,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665964962] [2023-11-29 06:58:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:21,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:58:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:21,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:21,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665964962] [2023-11-29 06:58:21,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665964962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:21,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:21,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:58:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182065608] [2023-11-29 06:58:21,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:21,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:58:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:58:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:21,364 INFO L87 Difference]: Start difference. First operand 343 states and 517 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:21,559 INFO L93 Difference]: Finished difference Result 295 states and 408 transitions. [2023-11-29 06:58:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:58:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-29 06:58:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:21,561 INFO L225 Difference]: With dead ends: 295 [2023-11-29 06:58:21,562 INFO L226 Difference]: Without dead ends: 295 [2023-11-29 06:58:21,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:58:21,563 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 49 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:21,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 657 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-29 06:58:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 256. [2023-11-29 06:58:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.87292817679558) internal successors, (339), 245 states have internal predecessors, (339), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2023-11-29 06:58:21,571 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 19 [2023-11-29 06:58:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:21,571 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2023-11-29 06:58:21,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2023-11-29 06:58:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 06:58:21,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:21,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:21,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 06:58:21,572 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:21,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash 632303953, now seen corresponding path program 1 times [2023-11-29 06:58:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903537068] [2023-11-29 06:58:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:21,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903537068] [2023-11-29 06:58:21,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903537068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:21,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:21,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:58:21,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98318631] [2023-11-29 06:58:21,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:21,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:58:21,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:21,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:58:21,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:21,768 INFO L87 Difference]: Start difference. First operand 256 states and 357 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:22,021 INFO L93 Difference]: Finished difference Result 344 states and 475 transitions. [2023-11-29 06:58:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:58:22,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-29 06:58:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:22,025 INFO L225 Difference]: With dead ends: 344 [2023-11-29 06:58:22,025 INFO L226 Difference]: Without dead ends: 344 [2023-11-29 06:58:22,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:58:22,026 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 145 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:22,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 714 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-29 06:58:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 264. [2023-11-29 06:58:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 189 states have (on average 1.8465608465608465) internal successors, (349), 252 states have internal predecessors, (349), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 367 transitions. [2023-11-29 06:58:22,038 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 367 transitions. Word has length 19 [2023-11-29 06:58:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:22,039 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 367 transitions. [2023-11-29 06:58:22,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 367 transitions. [2023-11-29 06:58:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 06:58:22,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:22,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:22,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 06:58:22,040 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:22,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash -732768597, now seen corresponding path program 1 times [2023-11-29 06:58:22,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:22,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686221734] [2023-11-29 06:58:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:22,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:22,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686221734] [2023-11-29 06:58:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686221734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:22,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:58:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812910911] [2023-11-29 06:58:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:58:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:58:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:22,279 INFO L87 Difference]: Start difference. First operand 264 states and 367 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:22,587 INFO L93 Difference]: Finished difference Result 339 states and 465 transitions. [2023-11-29 06:58:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:58:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-29 06:58:22,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:22,590 INFO L225 Difference]: With dead ends: 339 [2023-11-29 06:58:22,590 INFO L226 Difference]: Without dead ends: 339 [2023-11-29 06:58:22,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:58:22,591 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 114 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:22,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 862 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-29 06:58:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 268. [2023-11-29 06:58:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 193 states have (on average 1.8290155440414508) internal successors, (353), 255 states have internal predecessors, (353), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 371 transitions. [2023-11-29 06:58:22,602 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 371 transitions. Word has length 20 [2023-11-29 06:58:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:22,602 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 371 transitions. [2023-11-29 06:58:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 371 transitions. [2023-11-29 06:58:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 06:58:22,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:22,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:22,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 06:58:22,604 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:22,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash -492244314, now seen corresponding path program 1 times [2023-11-29 06:58:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691807340] [2023-11-29 06:58:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:22,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691807340] [2023-11-29 06:58:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691807340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:22,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655525448] [2023-11-29 06:58:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:22,648 INFO L87 Difference]: Start difference. First operand 268 states and 371 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:22,710 INFO L93 Difference]: Finished difference Result 280 states and 383 transitions. [2023-11-29 06:58:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:22,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-29 06:58:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:22,714 INFO L225 Difference]: With dead ends: 280 [2023-11-29 06:58:22,714 INFO L226 Difference]: Without dead ends: 280 [2023-11-29 06:58:22,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:22,715 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 3 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:22,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 420 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-29 06:58:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2023-11-29 06:58:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 202 states have (on average 1.7920792079207921) internal successors, (362), 264 states have internal predecessors, (362), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 380 transitions. [2023-11-29 06:58:22,725 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 380 transitions. Word has length 22 [2023-11-29 06:58:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:22,726 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 380 transitions. [2023-11-29 06:58:22,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 380 transitions. [2023-11-29 06:58:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 06:58:22,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:22,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:22,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 06:58:22,727 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:22,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash -492184732, now seen corresponding path program 1 times [2023-11-29 06:58:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:22,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087050435] [2023-11-29 06:58:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:22,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:22,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:22,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087050435] [2023-11-29 06:58:22,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087050435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:22,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:22,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:22,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607384386] [2023-11-29 06:58:22,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:22,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:22,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:22,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:22,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:22,813 INFO L87 Difference]: Start difference. First operand 277 states and 380 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:22,965 INFO L93 Difference]: Finished difference Result 357 states and 499 transitions. [2023-11-29 06:58:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-29 06:58:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:22,968 INFO L225 Difference]: With dead ends: 357 [2023-11-29 06:58:22,968 INFO L226 Difference]: Without dead ends: 357 [2023-11-29 06:58:22,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:22,969 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 73 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:22,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 303 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-29 06:58:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 320. [2023-11-29 06:58:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 246 states have (on average 1.7520325203252032) internal successors, (431), 307 states have internal predecessors, (431), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 449 transitions. [2023-11-29 06:58:22,982 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 449 transitions. Word has length 22 [2023-11-29 06:58:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:22,982 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 449 transitions. [2023-11-29 06:58:22,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 449 transitions. [2023-11-29 06:58:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 06:58:22,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:22,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:22,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 06:58:22,984 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:22,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash -492184733, now seen corresponding path program 1 times [2023-11-29 06:58:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:22,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751280854] [2023-11-29 06:58:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:22,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:23,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:23,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751280854] [2023-11-29 06:58:23,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751280854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:23,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:23,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:58:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409843141] [2023-11-29 06:58:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:23,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:58:23,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:58:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:58:23,028 INFO L87 Difference]: Start difference. First operand 320 states and 449 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:23,126 INFO L93 Difference]: Finished difference Result 317 states and 437 transitions. [2023-11-29 06:58:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:58:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-29 06:58:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:23,129 INFO L225 Difference]: With dead ends: 317 [2023-11-29 06:58:23,129 INFO L226 Difference]: Without dead ends: 317 [2023-11-29 06:58:23,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:58:23,130 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 32 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:23,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-29 06:58:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2023-11-29 06:58:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 246 states have (on average 1.7032520325203253) internal successors, (419), 304 states have internal predecessors, (419), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 437 transitions. [2023-11-29 06:58:23,143 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 437 transitions. Word has length 22 [2023-11-29 06:58:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:23,143 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 437 transitions. [2023-11-29 06:58:23,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 437 transitions. [2023-11-29 06:58:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 06:58:23,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:23,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:23,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 06:58:23,145 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:23,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:23,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2107629077, now seen corresponding path program 1 times [2023-11-29 06:58:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:23,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843919373] [2023-11-29 06:58:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:23,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:23,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843919373] [2023-11-29 06:58:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843919373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:58:23,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155864129] [2023-11-29 06:58:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:23,225 INFO L87 Difference]: Start difference. First operand 317 states and 437 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:23,333 INFO L93 Difference]: Finished difference Result 376 states and 515 transitions. [2023-11-29 06:58:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:58:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-29 06:58:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:23,338 INFO L225 Difference]: With dead ends: 376 [2023-11-29 06:58:23,338 INFO L226 Difference]: Without dead ends: 376 [2023-11-29 06:58:23,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:58:23,339 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 94 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:23,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 683 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-29 06:58:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 317. [2023-11-29 06:58:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 246 states have (on average 1.6910569105691058) internal successors, (416), 304 states have internal predecessors, (416), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 434 transitions. [2023-11-29 06:58:23,351 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 434 transitions. Word has length 23 [2023-11-29 06:58:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:23,351 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 434 transitions. [2023-11-29 06:58:23,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 434 transitions. [2023-11-29 06:58:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 06:58:23,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:23,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:23,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 06:58:23,353 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:23,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1676804042, now seen corresponding path program 1 times [2023-11-29 06:58:23,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:23,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196589455] [2023-11-29 06:58:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:23,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:23,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196589455] [2023-11-29 06:58:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196589455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:23,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904230418] [2023-11-29 06:58:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:23,447 INFO L87 Difference]: Start difference. First operand 317 states and 434 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:23,587 INFO L93 Difference]: Finished difference Result 395 states and 547 transitions. [2023-11-29 06:58:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:23,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-29 06:58:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:23,590 INFO L225 Difference]: With dead ends: 395 [2023-11-29 06:58:23,590 INFO L226 Difference]: Without dead ends: 395 [2023-11-29 06:58:23,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:23,591 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 66 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:23,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 240 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-29 06:58:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 317. [2023-11-29 06:58:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 246 states have (on average 1.6910569105691058) internal successors, (416), 304 states have internal predecessors, (416), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 434 transitions. [2023-11-29 06:58:23,603 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 434 transitions. Word has length 23 [2023-11-29 06:58:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:23,603 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 434 transitions. [2023-11-29 06:58:23,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 434 transitions. [2023-11-29 06:58:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 06:58:23,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:23,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:23,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 06:58:23,604 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:23,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1938104884, now seen corresponding path program 1 times [2023-11-29 06:58:23,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:23,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765600092] [2023-11-29 06:58:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:23,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:23,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:23,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765600092] [2023-11-29 06:58:23,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765600092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:23,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:23,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:58:23,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506395373] [2023-11-29 06:58:23,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:23,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:23,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:23,681 INFO L87 Difference]: Start difference. First operand 317 states and 434 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:23,796 INFO L93 Difference]: Finished difference Result 372 states and 506 transitions. [2023-11-29 06:58:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:58:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-29 06:58:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:23,799 INFO L225 Difference]: With dead ends: 372 [2023-11-29 06:58:23,799 INFO L226 Difference]: Without dead ends: 372 [2023-11-29 06:58:23,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:58:23,800 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 95 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:23,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 842 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-29 06:58:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 272. [2023-11-29 06:58:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 202 states have (on average 1.688118811881188) internal successors, (341), 259 states have internal predecessors, (341), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 359 transitions. [2023-11-29 06:58:23,811 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 359 transitions. Word has length 23 [2023-11-29 06:58:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:23,811 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 359 transitions. [2023-11-29 06:58:23,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:23,812 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 359 transitions. [2023-11-29 06:58:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 06:58:23,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:23,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:23,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 06:58:23,813 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:23,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash -543123644, now seen corresponding path program 1 times [2023-11-29 06:58:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:23,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019391020] [2023-11-29 06:58:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:23,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:23,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:23,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019391020] [2023-11-29 06:58:23,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019391020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:23,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:23,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:58:23,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223171821] [2023-11-29 06:58:23,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:23,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:23,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:23,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:23,919 INFO L87 Difference]: Start difference. First operand 272 states and 359 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:24,043 INFO L93 Difference]: Finished difference Result 303 states and 396 transitions. [2023-11-29 06:58:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:58:24,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-29 06:58:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:24,045 INFO L225 Difference]: With dead ends: 303 [2023-11-29 06:58:24,046 INFO L226 Difference]: Without dead ends: 303 [2023-11-29 06:58:24,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:24,046 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 21 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:24,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 367 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-29 06:58:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 293. [2023-11-29 06:58:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 223 states have (on average 1.6457399103139014) internal successors, (367), 280 states have internal predecessors, (367), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 385 transitions. [2023-11-29 06:58:24,056 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 385 transitions. Word has length 24 [2023-11-29 06:58:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:24,056 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 385 transitions. [2023-11-29 06:58:24,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 385 transitions. [2023-11-29 06:58:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 06:58:24,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:24,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:24,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 06:58:24,058 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:24,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -543123450, now seen corresponding path program 1 times [2023-11-29 06:58:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063519838] [2023-11-29 06:58:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:24,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:24,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063519838] [2023-11-29 06:58:24,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063519838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:24,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:24,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:24,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269143475] [2023-11-29 06:58:24,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:24,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:24,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:24,137 INFO L87 Difference]: Start difference. First operand 293 states and 385 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:24,224 INFO L93 Difference]: Finished difference Result 391 states and 518 transitions. [2023-11-29 06:58:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-29 06:58:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:24,227 INFO L225 Difference]: With dead ends: 391 [2023-11-29 06:58:24,227 INFO L226 Difference]: Without dead ends: 391 [2023-11-29 06:58:24,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:24,228 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 101 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:24,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 276 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-29 06:58:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 361. [2023-11-29 06:58:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 291 states have (on average 1.6185567010309279) internal successors, (471), 348 states have internal predecessors, (471), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 489 transitions. [2023-11-29 06:58:24,240 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 489 transitions. Word has length 24 [2023-11-29 06:58:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:24,240 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 489 transitions. [2023-11-29 06:58:24,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 489 transitions. [2023-11-29 06:58:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:58:24,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:24,241 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 06:58:24,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 06:58:24,241 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:24,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash 795949804, now seen corresponding path program 1 times [2023-11-29 06:58:24,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:24,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741486150] [2023-11-29 06:58:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:24,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:24,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741486150] [2023-11-29 06:58:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741486150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:24,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293689563] [2023-11-29 06:58:24,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:24,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:24,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:24,334 INFO L87 Difference]: Start difference. First operand 361 states and 489 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:24,473 INFO L93 Difference]: Finished difference Result 390 states and 512 transitions. [2023-11-29 06:58:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-29 06:58:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:24,476 INFO L225 Difference]: With dead ends: 390 [2023-11-29 06:58:24,476 INFO L226 Difference]: Without dead ends: 390 [2023-11-29 06:58:24,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:24,477 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 60 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:24,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 317 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-29 06:58:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 292. [2023-11-29 06:58:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 223 states have (on average 1.6188340807174888) internal successors, (361), 279 states have internal predecessors, (361), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 379 transitions. [2023-11-29 06:58:24,489 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 379 transitions. Word has length 25 [2023-11-29 06:58:24,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:24,489 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 379 transitions. [2023-11-29 06:58:24,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 379 transitions. [2023-11-29 06:58:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:58:24,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:24,490 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 06:58:24,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 06:58:24,490 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:24,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2036155710, now seen corresponding path program 1 times [2023-11-29 06:58:24,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:24,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512925861] [2023-11-29 06:58:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:24,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:24,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512925861] [2023-11-29 06:58:24,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512925861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:24,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:24,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:24,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610015601] [2023-11-29 06:58:24,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:24,579 INFO L87 Difference]: Start difference. First operand 292 states and 379 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:24,726 INFO L93 Difference]: Finished difference Result 291 states and 377 transitions. [2023-11-29 06:58:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-29 06:58:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:24,728 INFO L225 Difference]: With dead ends: 291 [2023-11-29 06:58:24,728 INFO L226 Difference]: Without dead ends: 291 [2023-11-29 06:58:24,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:24,729 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 56 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:24,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 361 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-29 06:58:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2023-11-29 06:58:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 223 states have (on average 1.609865470852018) internal successors, (359), 278 states have internal predecessors, (359), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2023-11-29 06:58:24,738 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 28 [2023-11-29 06:58:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:24,739 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2023-11-29 06:58:24,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2023-11-29 06:58:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:58:24,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:24,740 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 06:58:24,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-29 06:58:24,740 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:24,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2036155711, now seen corresponding path program 1 times [2023-11-29 06:58:24,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:24,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652198134] [2023-11-29 06:58:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:24,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:24,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652198134] [2023-11-29 06:58:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652198134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:24,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:24,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:58:24,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85963193] [2023-11-29 06:58:24,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:24,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:58:24,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:24,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:58:24,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:24,916 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:25,150 INFO L93 Difference]: Finished difference Result 388 states and 508 transitions. [2023-11-29 06:58:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:58:25,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-29 06:58:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:25,153 INFO L225 Difference]: With dead ends: 388 [2023-11-29 06:58:25,153 INFO L226 Difference]: Without dead ends: 388 [2023-11-29 06:58:25,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:58:25,154 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 119 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:25,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 589 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-11-29 06:58:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 290. [2023-11-29 06:58:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 223 states have (on average 1.600896860986547) internal successors, (357), 277 states have internal predecessors, (357), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 375 transitions. [2023-11-29 06:58:25,165 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 375 transitions. Word has length 28 [2023-11-29 06:58:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:25,166 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 375 transitions. [2023-11-29 06:58:25,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 375 transitions. [2023-11-29 06:58:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:58:25,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:25,167 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 06:58:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 06:58:25,167 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:25,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1759446305, now seen corresponding path program 1 times [2023-11-29 06:58:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:25,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705486281] [2023-11-29 06:58:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:25,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:25,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:25,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:25,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705486281] [2023-11-29 06:58:25,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705486281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:25,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:25,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:25,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252557913] [2023-11-29 06:58:25,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:25,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:25,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:25,263 INFO L87 Difference]: Start difference. First operand 290 states and 375 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:25,397 INFO L93 Difference]: Finished difference Result 326 states and 414 transitions. [2023-11-29 06:58:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:25,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-29 06:58:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:25,402 INFO L225 Difference]: With dead ends: 326 [2023-11-29 06:58:25,402 INFO L226 Difference]: Without dead ends: 326 [2023-11-29 06:58:25,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:25,404 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 86 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:25,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 297 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-29 06:58:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 287. [2023-11-29 06:58:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 223 states have (on average 1.5739910313901346) internal successors, (351), 274 states have internal predecessors, (351), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 369 transitions. [2023-11-29 06:58:25,414 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 369 transitions. Word has length 30 [2023-11-29 06:58:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:25,414 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 369 transitions. [2023-11-29 06:58:25,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 369 transitions. [2023-11-29 06:58:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:58:25,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:25,415 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 06:58:25,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 06:58:25,416 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:25,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1759446304, now seen corresponding path program 1 times [2023-11-29 06:58:25,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:25,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13858143] [2023-11-29 06:58:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:25,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:25,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:25,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13858143] [2023-11-29 06:58:25,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13858143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:25,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:25,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:58:25,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020145506] [2023-11-29 06:58:25,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:25,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:25,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:25,589 INFO L87 Difference]: Start difference. First operand 287 states and 369 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:25,773 INFO L93 Difference]: Finished difference Result 325 states and 412 transitions. [2023-11-29 06:58:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:58:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-29 06:58:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:25,776 INFO L225 Difference]: With dead ends: 325 [2023-11-29 06:58:25,776 INFO L226 Difference]: Without dead ends: 325 [2023-11-29 06:58:25,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:58:25,777 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 254 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:25,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 292 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-29 06:58:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 286. [2023-11-29 06:58:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 223 states have (on average 1.5650224215246638) internal successors, (349), 273 states have internal predecessors, (349), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2023-11-29 06:58:25,785 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 30 [2023-11-29 06:58:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:25,785 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2023-11-29 06:58:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2023-11-29 06:58:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:58:25,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:25,786 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 06:58:25,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-29 06:58:25,787 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:25,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1759446143, now seen corresponding path program 1 times [2023-11-29 06:58:25,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:25,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302061541] [2023-11-29 06:58:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:25,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302061541] [2023-11-29 06:58:25,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302061541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:25,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:25,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525085894] [2023-11-29 06:58:25,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:25,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:25,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:25,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:25,960 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:26,231 INFO L93 Difference]: Finished difference Result 337 states and 390 transitions. [2023-11-29 06:58:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-29 06:58:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:26,234 INFO L225 Difference]: With dead ends: 337 [2023-11-29 06:58:26,234 INFO L226 Difference]: Without dead ends: 337 [2023-11-29 06:58:26,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:26,235 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:26,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 235 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-29 06:58:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 286. [2023-11-29 06:58:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 223 states have (on average 1.5560538116591929) internal successors, (347), 273 states have internal predecessors, (347), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 365 transitions. [2023-11-29 06:58:26,244 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 365 transitions. Word has length 30 [2023-11-29 06:58:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:26,244 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 365 transitions. [2023-11-29 06:58:26,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 365 transitions. [2023-11-29 06:58:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 06:58:26,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:26,245 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-29 06:58:26,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-29 06:58:26,246 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:26,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:26,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1267354781, now seen corresponding path program 1 times [2023-11-29 06:58:26,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:26,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933719094] [2023-11-29 06:58:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:26,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:26,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:26,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:26,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933719094] [2023-11-29 06:58:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933719094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:26,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:26,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:58:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676173264] [2023-11-29 06:58:26,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:26,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:26,430 INFO L87 Difference]: Start difference. First operand 286 states and 365 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:26,591 INFO L93 Difference]: Finished difference Result 300 states and 379 transitions. [2023-11-29 06:58:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-11-29 06:58:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:26,594 INFO L225 Difference]: With dead ends: 300 [2023-11-29 06:58:26,594 INFO L226 Difference]: Without dead ends: 300 [2023-11-29 06:58:26,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:26,595 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 289 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:26,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 245 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-29 06:58:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 286. [2023-11-29 06:58:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 225 states have (on average 1.5466666666666666) internal successors, (348), 273 states have internal predecessors, (348), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 366 transitions. [2023-11-29 06:58:26,603 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 366 transitions. Word has length 41 [2023-11-29 06:58:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:26,603 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 366 transitions. [2023-11-29 06:58:26,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 366 transitions. [2023-11-29 06:58:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 06:58:26,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:26,604 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-29 06:58:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-29 06:58:26,605 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:26,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1267354843, now seen corresponding path program 1 times [2023-11-29 06:58:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:26,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924688407] [2023-11-29 06:58:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924688407] [2023-11-29 06:58:26,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924688407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:26,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:26,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:58:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885980908] [2023-11-29 06:58:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:26,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:26,796 INFO L87 Difference]: Start difference. First operand 286 states and 366 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:26,957 INFO L93 Difference]: Finished difference Result 299 states and 377 transitions. [2023-11-29 06:58:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-11-29 06:58:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:26,960 INFO L225 Difference]: With dead ends: 299 [2023-11-29 06:58:26,960 INFO L226 Difference]: Without dead ends: 299 [2023-11-29 06:58:26,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:58:26,961 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 287 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:26,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 267 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-29 06:58:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 283. [2023-11-29 06:58:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 223 states have (on average 1.5381165919282511) internal successors, (343), 270 states have internal predecessors, (343), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 361 transitions. [2023-11-29 06:58:26,970 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 361 transitions. Word has length 41 [2023-11-29 06:58:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:26,971 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 361 transitions. [2023-11-29 06:58:26,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 361 transitions. [2023-11-29 06:58:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 06:58:26,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:26,972 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-29 06:58:26,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-29 06:58:26,972 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:26,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:26,973 INFO L85 PathProgramCache]: Analyzing trace with hash -409373237, now seen corresponding path program 1 times [2023-11-29 06:58:26,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:26,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267171748] [2023-11-29 06:58:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:26,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:27,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 06:58:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:58:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:27,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267171748] [2023-11-29 06:58:27,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267171748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:27,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:27,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:58:27,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848904613] [2023-11-29 06:58:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:27,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:58:27,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:58:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:58:27,215 INFO L87 Difference]: Start difference. First operand 283 states and 361 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:58:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:27,377 INFO L93 Difference]: Finished difference Result 280 states and 355 transitions. [2023-11-29 06:58:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-11-29 06:58:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:27,379 INFO L225 Difference]: With dead ends: 280 [2023-11-29 06:58:27,380 INFO L226 Difference]: Without dead ends: 280 [2023-11-29 06:58:27,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:58:27,381 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 255 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:27,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 222 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:58:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-29 06:58:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2023-11-29 06:58:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 223 states have (on average 1.5112107623318385) internal successors, (337), 267 states have internal predecessors, (337), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 355 transitions. [2023-11-29 06:58:27,390 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 355 transitions. Word has length 43 [2023-11-29 06:58:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:27,390 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 355 transitions. [2023-11-29 06:58:27,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:58:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 355 transitions. [2023-11-29 06:58:27,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 06:58:27,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:27,391 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:27,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-29 06:58:27,392 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:27,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1842709678, now seen corresponding path program 1 times [2023-11-29 06:58:27,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:27,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376147259] [2023-11-29 06:58:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:28,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:28,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376147259] [2023-11-29 06:58:28,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376147259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:28,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:28,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:58:28,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074791045] [2023-11-29 06:58:28,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:28,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:58:28,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:28,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:58:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:58:28,331 INFO L87 Difference]: Start difference. First operand 280 states and 355 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:29,075 INFO L93 Difference]: Finished difference Result 304 states and 380 transitions. [2023-11-29 06:58:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:58:29,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-29 06:58:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:29,077 INFO L225 Difference]: With dead ends: 304 [2023-11-29 06:58:29,078 INFO L226 Difference]: Without dead ends: 304 [2023-11-29 06:58:29,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:58:29,079 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 65 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:29,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 901 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:58:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-29 06:58:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2023-11-29 06:58:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 241 states have (on average 1.4771784232365146) internal successors, (356), 285 states have internal predecessors, (356), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 06:58:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 374 transitions. [2023-11-29 06:58:29,088 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 374 transitions. Word has length 43 [2023-11-29 06:58:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:29,089 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 374 transitions. [2023-11-29 06:58:29,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 374 transitions. [2023-11-29 06:58:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 06:58:29,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:29,090 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-29 06:58:29,090 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:29,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1611312633, now seen corresponding path program 1 times [2023-11-29 06:58:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:29,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670498767] [2023-11-29 06:58:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:29,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:29,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:29,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670498767] [2023-11-29 06:58:29,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670498767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:29,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:29,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 06:58:29,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468907236] [2023-11-29 06:58:29,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:29,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:58:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:58:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:58:29,754 INFO L87 Difference]: Start difference. First operand 298 states and 374 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:30,495 INFO L93 Difference]: Finished difference Result 733 states and 931 transitions. [2023-11-29 06:58:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:58:30,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-29 06:58:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:30,500 INFO L225 Difference]: With dead ends: 733 [2023-11-29 06:58:30,500 INFO L226 Difference]: Without dead ends: 733 [2023-11-29 06:58:30,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:58:30,502 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 502 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:30,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 902 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-11-29 06:58:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 415. [2023-11-29 06:58:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 351 states have (on average 1.4700854700854702) internal successors, (516), 398 states have internal predecessors, (516), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 546 transitions. [2023-11-29 06:58:30,516 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 546 transitions. Word has length 44 [2023-11-29 06:58:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 546 transitions. [2023-11-29 06:58:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 546 transitions. [2023-11-29 06:58:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 06:58:30,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:30,518 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-29 06:58:30,518 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:30,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1611312634, now seen corresponding path program 1 times [2023-11-29 06:58:30,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:30,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702879656] [2023-11-29 06:58:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:30,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:32,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702879656] [2023-11-29 06:58:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702879656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:32,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400226868] [2023-11-29 06:58:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:32,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:32,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:32,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:32,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:58:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:32,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 06:58:32,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:32,419 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:58:32,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:58:32,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:58:32,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:58:32,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:58:32,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:58:32,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:58:32,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:58:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:32,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:58:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400226868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:32,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:58:32,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 23 [2023-11-29 06:58:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878812607] [2023-11-29 06:58:32,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:58:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:58:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:58:32,862 INFO L87 Difference]: Start difference. First operand 415 states and 546 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:33,476 INFO L93 Difference]: Finished difference Result 478 states and 576 transitions. [2023-11-29 06:58:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:58:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-29 06:58:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:33,479 INFO L225 Difference]: With dead ends: 478 [2023-11-29 06:58:33,479 INFO L226 Difference]: Without dead ends: 478 [2023-11-29 06:58:33,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:58:33,480 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 240 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:33,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 725 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:58:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-11-29 06:58:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 416. [2023-11-29 06:58:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 352 states have (on average 1.4659090909090908) internal successors, (516), 399 states have internal predecessors, (516), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 546 transitions. [2023-11-29 06:58:33,491 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 546 transitions. Word has length 44 [2023-11-29 06:58:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:33,491 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 546 transitions. [2023-11-29 06:58:33,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 546 transitions. [2023-11-29 06:58:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 06:58:33,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:33,492 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:33,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:58:33,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:33,693 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:33,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1788267860, now seen corresponding path program 1 times [2023-11-29 06:58:33,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:33,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229449401] [2023-11-29 06:58:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:33,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:34,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229449401] [2023-11-29 06:58:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229449401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:34,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:34,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-29 06:58:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370167838] [2023-11-29 06:58:34,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:58:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:58:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:58:34,713 INFO L87 Difference]: Start difference. First operand 416 states and 546 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:35,600 INFO L93 Difference]: Finished difference Result 528 states and 634 transitions. [2023-11-29 06:58:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:58:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-29 06:58:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:35,604 INFO L225 Difference]: With dead ends: 528 [2023-11-29 06:58:35,604 INFO L226 Difference]: Without dead ends: 528 [2023-11-29 06:58:35,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:58:35,605 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 320 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:35,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1067 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-11-29 06:58:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 407. [2023-11-29 06:58:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 343 states have (on average 1.478134110787172) internal successors, (507), 390 states have internal predecessors, (507), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 537 transitions. [2023-11-29 06:58:35,615 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 537 transitions. Word has length 44 [2023-11-29 06:58:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:35,615 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 537 transitions. [2023-11-29 06:58:35,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 537 transitions. [2023-11-29 06:58:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:35,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:35,616 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:35,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-29 06:58:35,616 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:35,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:35,617 INFO L85 PathProgramCache]: Analyzing trace with hash 933386794, now seen corresponding path program 1 times [2023-11-29 06:58:35,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:35,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309557680] [2023-11-29 06:58:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:35,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:36,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:36,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309557680] [2023-11-29 06:58:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309557680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:36,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:36,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 06:58:36,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489138685] [2023-11-29 06:58:36,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:36,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:58:36,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:58:36,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:58:36,324 INFO L87 Difference]: Start difference. First operand 407 states and 537 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:37,168 INFO L93 Difference]: Finished difference Result 795 states and 1017 transitions. [2023-11-29 06:58:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:58:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:37,173 INFO L225 Difference]: With dead ends: 795 [2023-11-29 06:58:37,173 INFO L226 Difference]: Without dead ends: 795 [2023-11-29 06:58:37,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:58:37,175 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 589 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:37,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 996 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-11-29 06:58:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 421. [2023-11-29 06:58:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 357 states have (on average 1.4593837535014005) internal successors, (521), 404 states have internal predecessors, (521), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 06:58:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 551 transitions. [2023-11-29 06:58:37,190 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 551 transitions. Word has length 45 [2023-11-29 06:58:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:37,191 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 551 transitions. [2023-11-29 06:58:37,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 551 transitions. [2023-11-29 06:58:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:37,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:37,192 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-29 06:58:37,192 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:37,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:37,193 INFO L85 PathProgramCache]: Analyzing trace with hash 933386795, now seen corresponding path program 1 times [2023-11-29 06:58:37,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862407484] [2023-11-29 06:58:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:37,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:38,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862407484] [2023-11-29 06:58:38,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862407484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:38,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:38,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 06:58:38,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569558439] [2023-11-29 06:58:38,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:38,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:58:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:58:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:58:38,166 INFO L87 Difference]: Start difference. First operand 421 states and 551 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:38,962 INFO L93 Difference]: Finished difference Result 781 states and 992 transitions. [2023-11-29 06:58:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:58:38,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:38,966 INFO L225 Difference]: With dead ends: 781 [2023-11-29 06:58:38,966 INFO L226 Difference]: Without dead ends: 781 [2023-11-29 06:58:38,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:58:38,967 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 614 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:38,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1114 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2023-11-29 06:58:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 468. [2023-11-29 06:58:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 400 states have (on average 1.4875) internal successors, (595), 449 states have internal predecessors, (595), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:58:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 631 transitions. [2023-11-29 06:58:38,980 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 631 transitions. Word has length 45 [2023-11-29 06:58:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:38,980 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 631 transitions. [2023-11-29 06:58:38,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 631 transitions. [2023-11-29 06:58:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:38,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:38,981 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:38,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-11-29 06:58:38,982 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:38,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash 933446376, now seen corresponding path program 1 times [2023-11-29 06:58:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:38,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051142451] [2023-11-29 06:58:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:38,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:40,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:40,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:40,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051142451] [2023-11-29 06:58:40,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051142451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:40,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882500883] [2023-11-29 06:58:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:40,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:40,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:40,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:58:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:40,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:58:40,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:40,837 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 [2023-11-29 06:58:41,160 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 19 treesize of output 1 [2023-11-29 06:58:41,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:58:41,452 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-29 06:58:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:41,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:58:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882500883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:41,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:58:41,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 25 [2023-11-29 06:58:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623324403] [2023-11-29 06:58:41,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:41,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:58:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:58:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:58:41,462 INFO L87 Difference]: Start difference. First operand 468 states and 631 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:42,211 INFO L93 Difference]: Finished difference Result 780 states and 1050 transitions. [2023-11-29 06:58:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:58:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:42,215 INFO L225 Difference]: With dead ends: 780 [2023-11-29 06:58:42,215 INFO L226 Difference]: Without dead ends: 780 [2023-11-29 06:58:42,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:58:42,216 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 271 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:42,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 771 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-11-29 06:58:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 580. [2023-11-29 06:58:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 496 states have (on average 1.471774193548387) internal successors, (730), 553 states have internal predecessors, (730), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-29 06:58:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 790 transitions. [2023-11-29 06:58:42,234 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 790 transitions. Word has length 45 [2023-11-29 06:58:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:42,234 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 790 transitions. [2023-11-29 06:58:42,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 790 transitions. [2023-11-29 06:58:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:42,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:42,236 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:42,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:58:42,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:42,438 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:42,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:42,438 INFO L85 PathProgramCache]: Analyzing trace with hash 933446377, now seen corresponding path program 1 times [2023-11-29 06:58:42,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:42,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438394913] [2023-11-29 06:58:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:42,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438394913] [2023-11-29 06:58:42,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438394913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:42,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:42,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 06:58:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731514113] [2023-11-29 06:58:42,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:42,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:58:42,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:58:42,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:58:42,827 INFO L87 Difference]: Start difference. First operand 580 states and 790 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:43,360 INFO L93 Difference]: Finished difference Result 921 states and 1251 transitions. [2023-11-29 06:58:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:58:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:43,364 INFO L225 Difference]: With dead ends: 921 [2023-11-29 06:58:43,364 INFO L226 Difference]: Without dead ends: 921 [2023-11-29 06:58:43,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:58:43,365 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 354 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:43,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 736 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:58:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-11-29 06:58:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 736. [2023-11-29 06:58:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 632 states have (on average 1.4936708860759493) internal successors, (944), 699 states have internal predecessors, (944), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 21 states have call predecessors, (60), 30 states have call successors, (60) [2023-11-29 06:58:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1034 transitions. [2023-11-29 06:58:43,390 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1034 transitions. Word has length 45 [2023-11-29 06:58:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:43,390 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1034 transitions. [2023-11-29 06:58:43,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1034 transitions. [2023-11-29 06:58:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:43,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:43,392 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:43,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-11-29 06:58:43,392 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:43,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:43,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1839449881, now seen corresponding path program 1 times [2023-11-29 06:58:43,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:43,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237876719] [2023-11-29 06:58:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:43,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:43,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:43,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237876719] [2023-11-29 06:58:43,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237876719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:43,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:43,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 06:58:43,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973460935] [2023-11-29 06:58:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:43,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:58:43,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:58:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:58:43,672 INFO L87 Difference]: Start difference. First operand 736 states and 1034 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:44,027 INFO L93 Difference]: Finished difference Result 1071 states and 1508 transitions. [2023-11-29 06:58:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:58:44,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:44,033 INFO L225 Difference]: With dead ends: 1071 [2023-11-29 06:58:44,033 INFO L226 Difference]: Without dead ends: 1071 [2023-11-29 06:58:44,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:58:44,034 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 259 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:44,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 610 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:58:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2023-11-29 06:58:44,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 788. [2023-11-29 06:58:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 676 states have (on average 1.4896449704142012) internal successors, (1007), 747 states have internal predecessors, (1007), 34 states have call successors, (34), 17 states have call predecessors, (34), 34 states have return successors, (68), 23 states have call predecessors, (68), 34 states have call successors, (68) [2023-11-29 06:58:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1109 transitions. [2023-11-29 06:58:44,052 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1109 transitions. Word has length 45 [2023-11-29 06:58:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:44,052 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1109 transitions. [2023-11-29 06:58:44,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1109 transitions. [2023-11-29 06:58:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:44,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:44,053 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:44,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-11-29 06:58:44,053 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:44,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1839449880, now seen corresponding path program 1 times [2023-11-29 06:58:44,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:44,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563373257] [2023-11-29 06:58:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:44,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:44,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:44,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:44,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563373257] [2023-11-29 06:58:44,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563373257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:44,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:44,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 06:58:44,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453214614] [2023-11-29 06:58:44,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:58:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:58:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:58:44,429 INFO L87 Difference]: Start difference. First operand 788 states and 1109 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:44,815 INFO L93 Difference]: Finished difference Result 1197 states and 1696 transitions. [2023-11-29 06:58:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:58:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:44,820 INFO L225 Difference]: With dead ends: 1197 [2023-11-29 06:58:44,820 INFO L226 Difference]: Without dead ends: 1197 [2023-11-29 06:58:44,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:58:44,821 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 418 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:44,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 704 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:58:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2023-11-29 06:58:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 668. [2023-11-29 06:58:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 572 states have (on average 1.513986013986014) internal successors, (866), 635 states have internal predecessors, (866), 26 states have call successors, (26), 13 states have call predecessors, (26), 26 states have return successors, (52), 19 states have call predecessors, (52), 26 states have call successors, (52) [2023-11-29 06:58:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 944 transitions. [2023-11-29 06:58:44,840 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 944 transitions. Word has length 45 [2023-11-29 06:58:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:44,841 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 944 transitions. [2023-11-29 06:58:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 944 transitions. [2023-11-29 06:58:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:44,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:44,842 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-11-29 06:58:44,842 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:44,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1839390299, now seen corresponding path program 1 times [2023-11-29 06:58:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82207469] [2023-11-29 06:58:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:45,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:45,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82207469] [2023-11-29 06:58:45,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82207469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:45,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:45,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:58:45,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046198683] [2023-11-29 06:58:45,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:45,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:58:45,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:58:45,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:58:45,222 INFO L87 Difference]: Start difference. First operand 668 states and 944 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:45,984 INFO L93 Difference]: Finished difference Result 1328 states and 1846 transitions. [2023-11-29 06:58:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:58:45,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:45,989 INFO L225 Difference]: With dead ends: 1328 [2023-11-29 06:58:45,989 INFO L226 Difference]: Without dead ends: 1328 [2023-11-29 06:58:45,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:58:45,990 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 356 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:45,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1816 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:58:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2023-11-29 06:58:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 870. [2023-11-29 06:58:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 750 states have (on average 1.4906666666666666) internal successors, (1118), 825 states have internal predecessors, (1118), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 25 states have call predecessors, (76), 38 states have call successors, (76) [2023-11-29 06:58:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1232 transitions. [2023-11-29 06:58:46,008 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1232 transitions. Word has length 45 [2023-11-29 06:58:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:46,009 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1232 transitions. [2023-11-29 06:58:46,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1232 transitions. [2023-11-29 06:58:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 06:58:46,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:46,009 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:46,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-11-29 06:58:46,010 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:46,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:46,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1839390298, now seen corresponding path program 1 times [2023-11-29 06:58:46,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:46,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821555607] [2023-11-29 06:58:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:46,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:46,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:46,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:46,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821555607] [2023-11-29 06:58:46,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821555607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:46,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:46,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 06:58:46,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162077167] [2023-11-29 06:58:46,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:46,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:58:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:58:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:58:46,508 INFO L87 Difference]: Start difference. First operand 870 states and 1232 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:47,445 INFO L93 Difference]: Finished difference Result 1308 states and 1799 transitions. [2023-11-29 06:58:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:58:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 06:58:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:47,452 INFO L225 Difference]: With dead ends: 1308 [2023-11-29 06:58:47,452 INFO L226 Difference]: Without dead ends: 1308 [2023-11-29 06:58:47,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:58:47,453 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 379 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:47,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1676 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:58:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-11-29 06:58:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 770. [2023-11-29 06:58:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 666 states have (on average 1.5) internal successors, (999), 733 states have internal predecessors, (999), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 21 states have call predecessors, (60), 30 states have call successors, (60) [2023-11-29 06:58:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1089 transitions. [2023-11-29 06:58:47,473 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1089 transitions. Word has length 45 [2023-11-29 06:58:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:47,473 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1089 transitions. [2023-11-29 06:58:47,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1089 transitions. [2023-11-29 06:58:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:58:47,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:47,474 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:47,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-11-29 06:58:47,474 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:47,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1129781716, now seen corresponding path program 1 times [2023-11-29 06:58:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531116140] [2023-11-29 06:58:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:47,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:47,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531116140] [2023-11-29 06:58:47,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531116140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:47,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:47,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 06:58:47,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971342789] [2023-11-29 06:58:47,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:47,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:58:47,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:58:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:58:47,943 INFO L87 Difference]: Start difference. First operand 770 states and 1089 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:48,476 INFO L93 Difference]: Finished difference Result 1312 states and 1804 transitions. [2023-11-29 06:58:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:58:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-29 06:58:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:48,483 INFO L225 Difference]: With dead ends: 1312 [2023-11-29 06:58:48,483 INFO L226 Difference]: Without dead ends: 1312 [2023-11-29 06:58:48,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:58:48,484 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 533 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:48,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1274 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:58:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2023-11-29 06:58:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 965. [2023-11-29 06:58:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 837 states have (on average 1.5101553166069295) internal successors, (1264), 916 states have internal predecessors, (1264), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 27 states have call predecessors, (84), 42 states have call successors, (84) [2023-11-29 06:58:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1390 transitions. [2023-11-29 06:58:48,503 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1390 transitions. Word has length 46 [2023-11-29 06:58:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:48,504 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 1390 transitions. [2023-11-29 06:58:48,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1390 transitions. [2023-11-29 06:58:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:58:48,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:48,505 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:48,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-11-29 06:58:48,505 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:48,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1127934674, now seen corresponding path program 1 times [2023-11-29 06:58:48,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:48,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240955484] [2023-11-29 06:58:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:48,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:48,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240955484] [2023-11-29 06:58:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240955484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:48,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 06:58:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600083105] [2023-11-29 06:58:48,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:48,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:58:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:58:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:58:48,712 INFO L87 Difference]: Start difference. First operand 965 states and 1390 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:48,977 INFO L93 Difference]: Finished difference Result 1349 states and 1919 transitions. [2023-11-29 06:58:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:58:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-29 06:58:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:48,985 INFO L225 Difference]: With dead ends: 1349 [2023-11-29 06:58:48,985 INFO L226 Difference]: Without dead ends: 1349 [2023-11-29 06:58:48,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:58:48,986 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 350 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:48,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 835 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-11-29 06:58:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1147. [2023-11-29 06:58:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 995 states have (on average 1.5195979899497487) internal successors, (1512), 1086 states have internal predecessors, (1512), 54 states have call successors, (54), 27 states have call predecessors, (54), 54 states have return successors, (108), 33 states have call predecessors, (108), 54 states have call successors, (108) [2023-11-29 06:58:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1674 transitions. [2023-11-29 06:58:49,019 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1674 transitions. Word has length 46 [2023-11-29 06:58:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:49,020 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1674 transitions. [2023-11-29 06:58:49,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1674 transitions. [2023-11-29 06:58:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:58:49,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:49,021 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:49,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-11-29 06:58:49,022 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:49,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:49,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1188372721, now seen corresponding path program 1 times [2023-11-29 06:58:49,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:49,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785661067] [2023-11-29 06:58:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:49,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:49,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:49,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785661067] [2023-11-29 06:58:49,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785661067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:49,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:49,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 06:58:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219186602] [2023-11-29 06:58:49,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:49,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:58:49,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:58:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:58:49,235 INFO L87 Difference]: Start difference. First operand 1147 states and 1674 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:49,478 INFO L93 Difference]: Finished difference Result 1488 states and 2142 transitions. [2023-11-29 06:58:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:58:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-29 06:58:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:49,484 INFO L225 Difference]: With dead ends: 1488 [2023-11-29 06:58:49,485 INFO L226 Difference]: Without dead ends: 1488 [2023-11-29 06:58:49,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:58:49,485 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 306 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:49,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 852 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2023-11-29 06:58:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 957. [2023-11-29 06:58:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 829 states have (on average 1.5126658624849216) internal successors, (1254), 908 states have internal predecessors, (1254), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 27 states have call predecessors, (84), 42 states have call successors, (84) [2023-11-29 06:58:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1380 transitions. [2023-11-29 06:58:49,512 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1380 transitions. Word has length 46 [2023-11-29 06:58:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:49,513 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1380 transitions. [2023-11-29 06:58:49,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1380 transitions. [2023-11-29 06:58:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:58:49,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:49,514 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:49,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-11-29 06:58:49,514 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:49,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1186525679, now seen corresponding path program 1 times [2023-11-29 06:58:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:49,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169094929] [2023-11-29 06:58:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:49,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:49,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169094929] [2023-11-29 06:58:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169094929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:49,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:49,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 06:58:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054869197] [2023-11-29 06:58:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:49,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:58:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:58:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:58:49,753 INFO L87 Difference]: Start difference. First operand 957 states and 1380 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:50,064 INFO L93 Difference]: Finished difference Result 1184 states and 1670 transitions. [2023-11-29 06:58:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:58:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-29 06:58:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:50,070 INFO L225 Difference]: With dead ends: 1184 [2023-11-29 06:58:50,070 INFO L226 Difference]: Without dead ends: 1184 [2023-11-29 06:58:50,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:58:50,071 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 261 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:50,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 951 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2023-11-29 06:58:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 809. [2023-11-29 06:58:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 701 states have (on average 1.507845934379458) internal successors, (1057), 770 states have internal predecessors, (1057), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 22 states have call predecessors, (64), 32 states have call successors, (64) [2023-11-29 06:58:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1153 transitions. [2023-11-29 06:58:50,091 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1153 transitions. Word has length 46 [2023-11-29 06:58:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:50,091 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1153 transitions. [2023-11-29 06:58:50,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1153 transitions. [2023-11-29 06:58:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 06:58:50,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:50,092 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-11-29 06:58:50,092 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:50,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash -663425663, now seen corresponding path program 1 times [2023-11-29 06:58:50,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:50,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122196285] [2023-11-29 06:58:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:50,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:50,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:50,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:50,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122196285] [2023-11-29 06:58:50,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122196285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:50,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:50,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 06:58:50,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990785691] [2023-11-29 06:58:50,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:50,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:58:50,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:58:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:58:50,617 INFO L87 Difference]: Start difference. First operand 809 states and 1153 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:51,221 INFO L93 Difference]: Finished difference Result 1350 states and 1865 transitions. [2023-11-29 06:58:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:58:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-11-29 06:58:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:51,225 INFO L225 Difference]: With dead ends: 1350 [2023-11-29 06:58:51,225 INFO L226 Difference]: Without dead ends: 1350 [2023-11-29 06:58:51,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:58:51,226 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 583 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:51,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 945 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:58:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2023-11-29 06:58:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1008. [2023-11-29 06:58:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 876 states have (on average 1.514840182648402) internal successors, (1327), 957 states have internal predecessors, (1327), 44 states have call successors, (44), 22 states have call predecessors, (44), 44 states have return successors, (88), 28 states have call predecessors, (88), 44 states have call successors, (88) [2023-11-29 06:58:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1459 transitions. [2023-11-29 06:58:51,253 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1459 transitions. Word has length 47 [2023-11-29 06:58:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:51,253 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1459 transitions. [2023-11-29 06:58:51,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1459 transitions. [2023-11-29 06:58:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 06:58:51,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:51,254 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:51,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-11-29 06:58:51,255 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:51,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -606167361, now seen corresponding path program 1 times [2023-11-29 06:58:51,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:51,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412480040] [2023-11-29 06:58:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:51,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:52,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:52,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412480040] [2023-11-29 06:58:52,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412480040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:52,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031994719] [2023-11-29 06:58:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:52,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:52,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:52,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:52,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:58:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:52,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:58:52,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:52,865 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 19 treesize of output 1 [2023-11-29 06:58:53,064 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:58:53,064 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-29 06:58:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:53,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:58:53,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031994719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:53,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:58:53,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 22 [2023-11-29 06:58:53,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037328176] [2023-11-29 06:58:53,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:53,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:58:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:58:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:58:53,074 INFO L87 Difference]: Start difference. First operand 1008 states and 1459 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:53,592 INFO L93 Difference]: Finished difference Result 1346 states and 1920 transitions. [2023-11-29 06:58:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:58:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-11-29 06:58:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:53,597 INFO L225 Difference]: With dead ends: 1346 [2023-11-29 06:58:53,597 INFO L226 Difference]: Without dead ends: 1346 [2023-11-29 06:58:53,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:58:53,598 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 256 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:53,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 745 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:58:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2023-11-29 06:58:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1142. [2023-11-29 06:58:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 994 states have (on average 1.528169014084507) internal successors, (1519), 1083 states have internal predecessors, (1519), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 32 states have call predecessors, (104), 52 states have call successors, (104) [2023-11-29 06:58:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1675 transitions. [2023-11-29 06:58:53,626 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1675 transitions. Word has length 47 [2023-11-29 06:58:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:53,626 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1675 transitions. [2023-11-29 06:58:53,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1675 transitions. [2023-11-29 06:58:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 06:58:53,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:53,627 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:53,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:58:53,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 06:58:53,828 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:53,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1815220478, now seen corresponding path program 1 times [2023-11-29 06:58:53,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:53,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286373879] [2023-11-29 06:58:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:53,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:54,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:54,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:54,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286373879] [2023-11-29 06:58:54,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286373879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:54,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 06:58:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442848699] [2023-11-29 06:58:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:54,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:58:54,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:58:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:58:54,098 INFO L87 Difference]: Start difference. First operand 1142 states and 1675 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:54,440 INFO L93 Difference]: Finished difference Result 1447 states and 2076 transitions. [2023-11-29 06:58:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:58:54,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-11-29 06:58:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:54,444 INFO L225 Difference]: With dead ends: 1447 [2023-11-29 06:58:54,444 INFO L226 Difference]: Without dead ends: 1447 [2023-11-29 06:58:54,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:58:54,444 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 378 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:54,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 702 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:58:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2023-11-29 06:58:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 909. [2023-11-29 06:58:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 789 states have (on average 1.512040557667934) internal successors, (1193), 864 states have internal predecessors, (1193), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 25 states have call predecessors, (76), 38 states have call successors, (76) [2023-11-29 06:58:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1307 transitions. [2023-11-29 06:58:54,465 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1307 transitions. Word has length 47 [2023-11-29 06:58:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:54,466 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1307 transitions. [2023-11-29 06:58:54,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1307 transitions. [2023-11-29 06:58:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 06:58:54,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:54,467 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:54,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-11-29 06:58:54,467 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:54,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:54,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1872478780, now seen corresponding path program 1 times [2023-11-29 06:58:54,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:54,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308483247] [2023-11-29 06:58:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:54,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:54,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:54,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308483247] [2023-11-29 06:58:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308483247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:54,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:54,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 06:58:54,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015069654] [2023-11-29 06:58:54,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:54,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:58:54,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:58:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:58:54,864 INFO L87 Difference]: Start difference. First operand 909 states and 1307 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:55,511 INFO L93 Difference]: Finished difference Result 1395 states and 1942 transitions. [2023-11-29 06:58:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:58:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-11-29 06:58:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:55,515 INFO L225 Difference]: With dead ends: 1395 [2023-11-29 06:58:55,515 INFO L226 Difference]: Without dead ends: 1395 [2023-11-29 06:58:55,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:58:55,515 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 393 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:55,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1644 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:58:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2023-11-29 06:58:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 952. [2023-11-29 06:58:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 828 states have (on average 1.5229468599033817) internal successors, (1261), 905 states have internal predecessors, (1261), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 26 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-29 06:58:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1381 transitions. [2023-11-29 06:58:55,530 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1381 transitions. Word has length 47 [2023-11-29 06:58:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:55,530 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 1381 transitions. [2023-11-29 06:58:55,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:58:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1381 transitions. [2023-11-29 06:58:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 06:58:55,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:55,531 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:55,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-11-29 06:58:55,531 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:55,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1301649672, now seen corresponding path program 1 times [2023-11-29 06:58:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:55,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535143791] [2023-11-29 06:58:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:55,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 06:58:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:58:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:55,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535143791] [2023-11-29 06:58:55,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535143791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:55,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:55,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:58:55,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656663997] [2023-11-29 06:58:55,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:55,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:58:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:58:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:58:55,913 INFO L87 Difference]: Start difference. First operand 952 states and 1381 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:58:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:58:56,267 INFO L93 Difference]: Finished difference Result 1208 states and 1721 transitions. [2023-11-29 06:58:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:58:56,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2023-11-29 06:58:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:58:56,270 INFO L225 Difference]: With dead ends: 1208 [2023-11-29 06:58:56,270 INFO L226 Difference]: Without dead ends: 1208 [2023-11-29 06:58:56,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:58:56,270 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 290 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:58:56,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 990 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:58:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2023-11-29 06:58:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1031. [2023-11-29 06:58:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 895 states have (on average 1.524022346368715) internal successors, (1364), 978 states have internal predecessors, (1364), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 29 states have call predecessors, (92), 46 states have call successors, (92) [2023-11-29 06:58:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1502 transitions. [2023-11-29 06:58:56,288 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1502 transitions. Word has length 49 [2023-11-29 06:58:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:58:56,289 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1502 transitions. [2023-11-29 06:58:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:58:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1502 transitions. [2023-11-29 06:58:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 06:58:56,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:58:56,290 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:56,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-11-29 06:58:56,290 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:58:56,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:56,290 INFO L85 PathProgramCache]: Analyzing trace with hash -426258107, now seen corresponding path program 1 times [2023-11-29 06:58:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:56,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615467648] [2023-11-29 06:58:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:56,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:58:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:56,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 06:58:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:58:56,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615467648] [2023-11-29 06:58:56,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615467648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185062027] [2023-11-29 06:58:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:56,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:56,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:58:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:57,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 06:58:57,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:57,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:58:57,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-29 06:58:57,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:58:57,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:58:57,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 100 [2023-11-29 06:58:57,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2023-11-29 06:58:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:57,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:57,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:58:57,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 67 [2023-11-29 06:58:58,031 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 74 treesize of output 70 [2023-11-29 06:58:58,054 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 74 treesize of output 70 [2023-11-29 06:58:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:58:58,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185062027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:58,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:58,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2023-11-29 06:58:58,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039876192] [2023-11-29 06:58:58,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:58,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:58:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:58,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:58:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:58:58,576 INFO L87 Difference]: Start difference. First operand 1031 states and 1502 transitions. Second operand has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:59:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:00,258 INFO L93 Difference]: Finished difference Result 1441 states and 2018 transitions. [2023-11-29 06:59:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:59:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2023-11-29 06:59:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:00,261 INFO L225 Difference]: With dead ends: 1441 [2023-11-29 06:59:00,261 INFO L226 Difference]: Without dead ends: 1441 [2023-11-29 06:59:00,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:59:00,262 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 649 mSDsluCounter, 4223 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 4474 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:00,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 4474 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:59:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2023-11-29 06:59:00,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 946. [2023-11-29 06:59:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 822 states have (on average 1.5194647201946472) internal successors, (1249), 899 states have internal predecessors, (1249), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 26 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-29 06:59:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1369 transitions. [2023-11-29 06:59:00,275 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1369 transitions. Word has length 49 [2023-11-29 06:59:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:00,276 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1369 transitions. [2023-11-29 06:59:00,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:59:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1369 transitions. [2023-11-29 06:59:00,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:59:00,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:00,277 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:00,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:59:00,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-29 06:59:00,477 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:00,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1696799981, now seen corresponding path program 1 times [2023-11-29 06:59:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:00,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228131446] [2023-11-29 06:59:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:00,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:00,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:00,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 06:59:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:59:00,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228131446] [2023-11-29 06:59:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228131446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:00,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:59:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343907680] [2023-11-29 06:59:00,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:00,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:59:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:59:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:59:00,666 INFO L87 Difference]: Start difference. First operand 946 states and 1369 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:59:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:00,825 INFO L93 Difference]: Finished difference Result 943 states and 1330 transitions. [2023-11-29 06:59:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:59:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-11-29 06:59:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:00,827 INFO L225 Difference]: With dead ends: 943 [2023-11-29 06:59:00,827 INFO L226 Difference]: Without dead ends: 943 [2023-11-29 06:59:00,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:59:00,828 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 361 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:00,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 212 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:59:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-11-29 06:59:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 943. [2023-11-29 06:59:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 822 states have (on average 1.4720194647201947) internal successors, (1210), 896 states have internal predecessors, (1210), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 26 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-29 06:59:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1330 transitions. [2023-11-29 06:59:00,839 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1330 transitions. Word has length 50 [2023-11-29 06:59:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:00,840 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1330 transitions. [2023-11-29 06:59:00,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:59:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1330 transitions. [2023-11-29 06:59:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:59:00,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:00,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-11-29 06:59:00,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-11-29 06:59:00,841 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:00,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash 643730812, now seen corresponding path program 1 times [2023-11-29 06:59:00,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:00,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243689487] [2023-11-29 06:59:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:00,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 06:59:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:59:01,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:01,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243689487] [2023-11-29 06:59:01,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243689487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:01,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393283353] [2023-11-29 06:59:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:01,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:01,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:01,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:01,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:59:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:01,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 06:59:01,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:01,625 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 [2023-11-29 06:59:01,865 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 [2023-11-29 06:59:01,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2023-11-29 06:59:02,141 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-29 06:59:02,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-29 06:59:02,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-11-29 06:59:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:02,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393283353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:02,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:59:02,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2023-11-29 06:59:02,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828229703] [2023-11-29 06:59:02,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:02,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:59:02,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:59:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:59:02,336 INFO L87 Difference]: Start difference. First operand 943 states and 1330 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 21 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:04,199 INFO L93 Difference]: Finished difference Result 1553 states and 2108 transitions. [2023-11-29 06:59:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 06:59:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 21 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-11-29 06:59:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:04,202 INFO L225 Difference]: With dead ends: 1553 [2023-11-29 06:59:04,202 INFO L226 Difference]: Without dead ends: 1553 [2023-11-29 06:59:04,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=535, Invalid=2545, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 06:59:04,203 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 912 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:04,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 2086 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:59:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2023-11-29 06:59:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 961. [2023-11-29 06:59:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 840 states have (on average 1.4702380952380953) internal successors, (1235), 912 states have internal predecessors, (1235), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-29 06:59:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1355 transitions. [2023-11-29 06:59:04,217 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1355 transitions. Word has length 50 [2023-11-29 06:59:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:04,217 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1355 transitions. [2023-11-29 06:59:04,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 21 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1355 transitions. [2023-11-29 06:59:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:59:04,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:04,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-11-29 06:59:04,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:59:04,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:04,419 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:04,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:04,419 INFO L85 PathProgramCache]: Analyzing trace with hash 643730813, now seen corresponding path program 1 times [2023-11-29 06:59:04,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:04,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146502457] [2023-11-29 06:59:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:04,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:05,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 06:59:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:59:05,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146502457] [2023-11-29 06:59:05,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146502457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52368961] [2023-11-29 06:59:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:05,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:05,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:05,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:05,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:59:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:05,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 06:59:05,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:05,524 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 [2023-11-29 06:59:05,888 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 [2023-11-29 06:59:05,899 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 [2023-11-29 06:59:06,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:59:06,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-29 06:59:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:59:06,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 06:59:06,310 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-29 06:59:06,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 06:59:06,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-11-29 06:59:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:06,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:06,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52368961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:06,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:59:06,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 28 [2023-11-29 06:59:06,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362396386] [2023-11-29 06:59:06,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:06,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:59:06,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:59:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:59:06,758 INFO L87 Difference]: Start difference. First operand 961 states and 1355 transitions. Second operand has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:09,128 INFO L93 Difference]: Finished difference Result 1563 states and 2120 transitions. [2023-11-29 06:59:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 06:59:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-11-29 06:59:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:09,131 INFO L225 Difference]: With dead ends: 1563 [2023-11-29 06:59:09,131 INFO L226 Difference]: Without dead ends: 1563 [2023-11-29 06:59:09,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=621, Invalid=3411, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 06:59:09,132 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 972 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:09,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 2021 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:59:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2023-11-29 06:59:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 961. [2023-11-29 06:59:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 840 states have (on average 1.4678571428571427) internal successors, (1233), 912 states have internal predecessors, (1233), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-29 06:59:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1353 transitions. [2023-11-29 06:59:09,148 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1353 transitions. Word has length 50 [2023-11-29 06:59:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:09,148 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1353 transitions. [2023-11-29 06:59:09,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1353 transitions. [2023-11-29 06:59:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:59:09,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:09,149 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:09,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:59:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 06:59:09,350 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:09,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1325883230, now seen corresponding path program 1 times [2023-11-29 06:59:09,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:09,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318654033] [2023-11-29 06:59:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:10,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:10,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:10,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318654033] [2023-11-29 06:59:10,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318654033] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250663369] [2023-11-29 06:59:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:10,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:10,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:10,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:59:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:11,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-29 06:59:11,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:11,197 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:59:11,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:59:11,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:59:11,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:59:11,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:59:11,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 06:59:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:59:11,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 06:59:11,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:59:11,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:59:11,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:59:11,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:59:11,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:59:11,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:59:11,976 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:59:11,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 39 [2023-11-29 06:59:11,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:59:11,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 06:59:12,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:12,232 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 25 treesize of output 15 [2023-11-29 06:59:12,250 INFO L349 Elim1Store]: treesize reduction 30, result has 30.2 percent of original size [2023-11-29 06:59:12,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 25 [2023-11-29 06:59:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:12,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:13,578 INFO L349 Elim1Store]: treesize reduction 52, result has 48.5 percent of original size [2023-11-29 06:59:13,578 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 109 [2023-11-29 06:59:13,629 INFO L349 Elim1Store]: treesize reduction 52, result has 48.5 percent of original size [2023-11-29 06:59:13,629 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2023-11-29 06:59:13,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:13,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 390 treesize of output 396 [2023-11-29 06:59:13,907 INFO L349 Elim1Store]: treesize reduction 82, result has 72.4 percent of original size [2023-11-29 06:59:13,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1324 treesize of output 1402 [2023-11-29 06:59:13,953 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 742 treesize of output 726 [2023-11-29 06:59:13,981 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 726 treesize of output 694 [2023-11-29 06:59:14,020 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 1396 treesize of output 1334 [2023-11-29 06:59:14,638 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 10 treesize of output 4 [2023-11-29 06:59:28,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:28,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2023-11-29 06:59:28,304 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 6 treesize of output 4 [2023-11-29 06:59:28,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:28,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 267 [2023-11-29 06:59:28,496 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:59:28,497 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:59:28,505 INFO L349 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2023-11-29 06:59:28,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 1 [2023-11-29 06:59:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:29,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250663369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:29,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:29,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 17] total 46 [2023-11-29 06:59:29,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938428782] [2023-11-29 06:59:29,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:29,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 06:59:29,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:29,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 06:59:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1882, Unknown=15, NotChecked=0, Total=2070 [2023-11-29 06:59:29,256 INFO L87 Difference]: Start difference. First operand 961 states and 1353 transitions. Second operand has 46 states, 46 states have (on average 2.782608695652174) internal successors, (128), 45 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 06:59:32,254 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$#1.base| 3)) (.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| 4) |c_ULTIMATE.start_append_one_~item~1#1.base|)))) (let ((.cse1 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|)) (.cse2 (select .cse3 0))) (and (= (select (select .cse0 .cse1) 4) 0) (= (select |c_#valid| 3) 1) (= (select (select |c_#memory_$Pointer$#1.offset| .cse2) 4) 0) (= |c_~#list~0.offset| 0) (= .cse2 (select .cse3 4)) (forall ((v_ArrVal_1460 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1460) .cse1) 4) 0)) (= 3 |c_~#list~0.base|) (= (select (select |c_#memory_$Pointer$#1.base| .cse2) 4) 0)))) is different from false [2023-11-29 06:59:33,337 WARN L854 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| 3) 1) (or (< |c_ULTIMATE.start_append_one_~list#1.offset| 0) (not (= |c_ULTIMATE.start_create_item_~link~0#1.offset| 0)) (not (= |c_ULTIMATE.start_create_item_~link~0#1.base| 0)) (let ((.cse2 (+ |c_ULTIMATE.start_append_one_~list#1.offset| 4)) (.cse3 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |c_ULTIMATE.start_create_item_~term_field~0#1| 4))) (.cse5 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| 8))) (and (forall ((v_ArrVal_1451 Int) (v_ArrVal_1455 (Array Int Int)) (v_ArrVal_1449 Int)) (= (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 v_ArrVal_1449) .cse5 v_ArrVal_1451)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1455))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) 4) 0)) (forall ((|ULTIMATE.start_create_item_#t~ite16#1.offset| Int) (v_ArrVal_1451 Int) (v_ArrVal_1456 (Array Int Int)) (v_ArrVal_1455 (Array Int Int)) (v_ArrVal_1454 Int) (v_ArrVal_1460 (Array Int Int)) (v_ArrVal_1449 Int)) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 |ULTIMATE.start_create_item_#t~ite16#1.offset|) .cse5 v_ArrVal_1454)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1456) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1460) (select (select (let ((.cse6 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 v_ArrVal_1449) .cse5 v_ArrVal_1451)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1455))) (store .cse6 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse6 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|)) 4) 0))))) (= |c_~#list~0.offset| 0) (= |c_ULTIMATE.start_main_#t~ret30#1| 0) (= 3 |c_~#list~0.base|)) is different from false [2023-11-29 06:59:33,369 WARN L854 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| 3) 1) (or (< |c_ULTIMATE.start_append_one_~list#1.offset| 0) (not (= |c_ULTIMATE.start_create_item_~link~0#1.offset| 0)) (not (= |c_ULTIMATE.start_create_item_~link~0#1.base| 0)) (let ((.cse2 (+ |c_ULTIMATE.start_append_one_~list#1.offset| 4)) (.cse3 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |c_ULTIMATE.start_create_item_~term_field~0#1| 4))) (.cse5 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| 8))) (and (forall ((v_ArrVal_1451 Int) (v_ArrVal_1455 (Array Int Int)) (v_ArrVal_1449 Int)) (= (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 v_ArrVal_1449) .cse5 v_ArrVal_1451)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1455))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) 4) 0)) (forall ((|ULTIMATE.start_create_item_#t~ite16#1.offset| Int) (v_ArrVal_1451 Int) (v_ArrVal_1456 (Array Int Int)) (v_ArrVal_1455 (Array Int Int)) (v_ArrVal_1454 Int) (v_ArrVal_1460 (Array Int Int)) (v_ArrVal_1449 Int)) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 |ULTIMATE.start_create_item_#t~ite16#1.offset|) .cse5 v_ArrVal_1454)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1456) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1460) (select (select (let ((.cse6 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 v_ArrVal_1449) .cse5 v_ArrVal_1451)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1455))) (store .cse6 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse6 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|)) 4) 0))))) (= |c_~#list~0.offset| 0) (= 3 |c_~#list~0.base|)) is different from false [2023-11-29 06:59:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:36,706 INFO L93 Difference]: Finished difference Result 2017 states and 2644 transitions. [2023-11-29 06:59:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 06:59:36,707 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.782608695652174) internal successors, (128), 45 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2023-11-29 06:59:36,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:36,711 INFO L225 Difference]: With dead ends: 2017 [2023-11-29 06:59:36,711 INFO L226 Difference]: Without dead ends: 2017 [2023-11-29 06:59:36,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3234 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1117, Invalid=10195, Unknown=42, NotChecked=636, Total=11990 [2023-11-29 06:59:36,713 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 1782 mSDsluCounter, 3173 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 100 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1787 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:36,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1787 Valid, 3299 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2510 Invalid, 10 Unknown, 405 Unchecked, 3.3s Time] [2023-11-29 06:59:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2023-11-29 06:59:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1393. [2023-11-29 06:59:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1228 states have (on average 1.4405537459283388) internal successors, (1769), 1318 states have internal predecessors, (1769), 62 states have call successors, (62), 31 states have call predecessors, (62), 62 states have return successors, (124), 43 states have call predecessors, (124), 62 states have call successors, (124) [2023-11-29 06:59:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1955 transitions. [2023-11-29 06:59:36,737 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1955 transitions. Word has length 50 [2023-11-29 06:59:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:36,737 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 1955 transitions. [2023-11-29 06:59:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.782608695652174) internal successors, (128), 45 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 06:59:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1955 transitions. [2023-11-29 06:59:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:59:36,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:36,739 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:36,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:59:36,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:36,940 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:36,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2005941600, now seen corresponding path program 1 times [2023-11-29 06:59:36,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:36,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756461860] [2023-11-29 06:59:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:36,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:38,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:38,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756461860] [2023-11-29 06:59:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756461860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660596207] [2023-11-29 06:59:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:38,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:38,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:38,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:38,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:59:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:38,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 06:59:38,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:38,645 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:59:38,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:59:39,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:59:39,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:59:39,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 06:59:39,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-29 06:59:39,613 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:59:39,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:59:39,624 INFO L349 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2023-11-29 06:59:39,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 39 [2023-11-29 06:59:39,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:39,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 06:59:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:39,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:39,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:39,938 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-11-29 06:59:39,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:39,947 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 06:59:40,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:40,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 206 [2023-11-29 06:59:40,227 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:59:40,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:40,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 153 [2023-11-29 06:59:40,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:40,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 165 [2023-11-29 06:59:40,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:40,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 138 [2023-11-29 06:59:40,314 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 110 treesize of output 106 [2023-11-29 06:59:42,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660596207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:42,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:59:42,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 34 [2023-11-29 06:59:42,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639074154] [2023-11-29 06:59:42,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:42,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:59:42,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:42,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:59:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1726, Unknown=15, NotChecked=0, Total=1892 [2023-11-29 06:59:42,916 INFO L87 Difference]: Start difference. First operand 1393 states and 1955 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:59:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:46,894 INFO L93 Difference]: Finished difference Result 1839 states and 2486 transitions. [2023-11-29 06:59:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 06:59:46,895 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-11-29 06:59:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:46,899 INFO L225 Difference]: With dead ends: 1839 [2023-11-29 06:59:46,899 INFO L226 Difference]: Without dead ends: 1839 [2023-11-29 06:59:46,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=648, Invalid=5814, Unknown=18, NotChecked=0, Total=6480 [2023-11-29 06:59:46,901 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 574 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:46,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 3514 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 06:59:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2023-11-29 06:59:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1476. [2023-11-29 06:59:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1299 states have (on average 1.4395688991531947) internal successors, (1870), 1395 states have internal predecessors, (1870), 68 states have call successors, (68), 34 states have call predecessors, (68), 68 states have return successors, (136), 46 states have call predecessors, (136), 68 states have call successors, (136) [2023-11-29 06:59:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 2074 transitions. [2023-11-29 06:59:46,925 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 2074 transitions. Word has length 50 [2023-11-29 06:59:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:46,925 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 2074 transitions. [2023-11-29 06:59:46,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 06:59:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 2074 transitions. [2023-11-29 06:59:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 06:59:46,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:46,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:46,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:59:47,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:47,127 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:47,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash -378535968, now seen corresponding path program 1 times [2023-11-29 06:59:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:47,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900693383] [2023-11-29 06:59:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:47,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:47,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 06:59:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:47,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900693383] [2023-11-29 06:59:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900693383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322196560] [2023-11-29 06:59:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:47,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:47,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:47,553 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:47,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:59:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:47,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 06:59:47,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:47,770 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 [2023-11-29 06:59:48,060 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 19 treesize of output 1 [2023-11-29 06:59:48,306 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2023-11-29 06:59:48,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-11-29 06:59:48,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:59:48,453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-29 06:59:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:48,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:48,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322196560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:48,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:59:48,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2023-11-29 06:59:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441179205] [2023-11-29 06:59:48,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:48,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:59:48,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:59:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:59:48,547 INFO L87 Difference]: Start difference. First operand 1476 states and 2074 transitions. Second operand has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:50,062 INFO L93 Difference]: Finished difference Result 1880 states and 2617 transitions. [2023-11-29 06:59:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:59:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-11-29 06:59:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:50,065 INFO L225 Difference]: With dead ends: 1880 [2023-11-29 06:59:50,065 INFO L226 Difference]: Without dead ends: 1880 [2023-11-29 06:59:50,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:59:50,066 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 482 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:50,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 2036 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:59:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2023-11-29 06:59:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1549. [2023-11-29 06:59:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1364 states have (on average 1.435483870967742) internal successors, (1958), 1461 states have internal predecessors, (1958), 72 states have call successors, (72), 36 states have call predecessors, (72), 72 states have return successors, (144), 51 states have call predecessors, (144), 72 states have call successors, (144) [2023-11-29 06:59:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 2174 transitions. [2023-11-29 06:59:50,090 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 2174 transitions. Word has length 51 [2023-11-29 06:59:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:50,090 INFO L495 AbstractCegarLoop]: Abstraction has 1549 states and 2174 transitions. [2023-11-29 06:59:50,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 2174 transitions. [2023-11-29 06:59:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 06:59:50,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:50,091 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:50,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:59:50,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:50,292 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:50,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash -378535967, now seen corresponding path program 1 times [2023-11-29 06:59:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:50,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123136692] [2023-11-29 06:59:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:50,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:50,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 06:59:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:50,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:50,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123136692] [2023-11-29 06:59:50,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123136692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:50,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960469049] [2023-11-29 06:59:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:50,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:50,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:50,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:59:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:51,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 06:59:51,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:51,143 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 [2023-11-29 06:59:51,150 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 [2023-11-29 06:59:51,614 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 19 treesize of output 1 [2023-11-29 06:59:51,619 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 13 treesize of output 9 [2023-11-29 06:59:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:59:51,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 06:59:51,968 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2023-11-29 06:59:51,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-29 06:59:52,198 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:59:52,199 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-11-29 06:59:52,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:59:52,206 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-29 06:59:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:52,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:52,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960469049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:52,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:59:52,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-11-29 06:59:52,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597072778] [2023-11-29 06:59:52,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:52,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:59:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:59:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:59:52,481 INFO L87 Difference]: Start difference. First operand 1549 states and 2174 transitions. Second operand has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:59:54,723 INFO L93 Difference]: Finished difference Result 2077 states and 2853 transitions. [2023-11-29 06:59:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:59:54,723 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-11-29 06:59:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:59:54,728 INFO L225 Difference]: With dead ends: 2077 [2023-11-29 06:59:54,728 INFO L226 Difference]: Without dead ends: 2077 [2023-11-29 06:59:54,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:59:54,729 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 813 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:59:54,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 1586 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 06:59:54,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2023-11-29 06:59:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1590. [2023-11-29 06:59:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1401 states have (on average 1.436830835117773) internal successors, (2013), 1499 states have internal predecessors, (2013), 74 states have call successors, (74), 37 states have call predecessors, (74), 74 states have return successors, (148), 53 states have call predecessors, (148), 74 states have call successors, (148) [2023-11-29 06:59:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2235 transitions. [2023-11-29 06:59:54,760 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2235 transitions. Word has length 51 [2023-11-29 06:59:54,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:59:54,760 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 2235 transitions. [2023-11-29 06:59:54,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:59:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2235 transitions. [2023-11-29 06:59:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 06:59:54,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:59:54,761 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:54,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:59:54,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:54,962 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 06:59:54,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash -699650367, now seen corresponding path program 1 times [2023-11-29 06:59:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:54,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735519317] [2023-11-29 06:59:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:54,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:56,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 06:59:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:56,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:56,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735519317] [2023-11-29 06:59:56,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735519317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:56,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590580352] [2023-11-29 06:59:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:56,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:56,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:56,654 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:56,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:59:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:56,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 06:59:56,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:56,900 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:59:56,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:59:57,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:59:57,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 06:59:57,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:59:57,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:59:57,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:59:57,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:59:57,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:59:57,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 06:59:57,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:59:57,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 15 [2023-11-29 06:59:57,813 INFO L349 Elim1Store]: treesize reduction 15, result has 34.8 percent of original size [2023-11-29 06:59:57,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 22 [2023-11-29 06:59:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:57,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:58,044 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_append_one_~item~1#1.base|)))) (let ((.cse0 (select (select .cse1 |c_~#list~0.base|) |c_~#list~0.offset|))) (and (forall ((v_ArrVal_1787 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1787) .cse0) 4) 0)) (= (select (select .cse1 .cse0) 4) 0)))) is different from false [2023-11-29 06:59:59,978 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| 8))) (and (forall ((v_ArrVal_1781 Int) (v_ArrVal_1786 (Array Int Int))) (= (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse2 .cse3 v_ArrVal_1781)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1786))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) 4) 0)) (forall ((v_ArrVal_1781 Int) (v_ArrVal_1787 (Array Int Int)) (v_ArrVal_1786 (Array Int Int)) (v_ArrVal_1783 Int) (v_ArrVal_1785 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 v_ArrVal_1783)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1785) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1787) (select (select (let ((.cse4 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse2 .cse3 v_ArrVal_1781)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1786))) (store .cse4 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|)) 4) 0)))) is different from false [2023-11-29 07:00:00,008 INFO L349 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2023-11-29 07:00:00,008 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 67 [2023-11-29 07:00:00,210 INFO L349 Elim1Store]: treesize reduction 62, result has 70.6 percent of original size [2023-11-29 07:00:00,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 2096 treesize of output 2049 [2023-11-29 07:00:00,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:00:00,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1670 treesize of output 1568 [2023-11-29 07:00:00,718 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 10 treesize of output 4 [2023-11-29 07:00:02,376 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-29 07:00:03,735 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-29 07:00:04,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:00:04,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 302 treesize of output 304 [2023-11-29 07:00:04,837 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-29 07:00:07,712 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-29 07:00:16,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:00:16,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 962 treesize of output 958 [2023-11-29 07:00:39,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:00:39,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 129 [2023-11-29 07:01:09,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:09,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-29 07:01:12,134 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 07:01:12,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 1 [2023-11-29 07:01:14,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:14,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 73 [2023-11-29 07:01:14,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:14,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-29 07:01:15,217 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 10 treesize of output 4 [2023-11-29 07:01:15,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:15,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2023-11-29 07:01:15,777 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 10 treesize of output 4 [2023-11-29 07:01:15,925 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 10 treesize of output 4 [2023-11-29 07:01:16,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:16,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2023-11-29 07:01:18,904 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 07:01:18,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:18,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 64 [2023-11-29 07:01:19,070 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 10 treesize of output 4 [2023-11-29 07:01:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 07:01:19,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2023-11-29 07:01:19,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 72 [2023-11-29 07:01:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:19,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 133 [2023-11-29 07:01:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:19,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 35 [2023-11-29 07:01:19,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:19,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 62 [2023-11-29 07:01:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:19,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 147 [2023-11-29 07:01:19,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 127 [2023-11-29 07:01:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:19,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2023-11-29 07:01:19,780 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 [2023-11-29 07:01:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:19,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2023-11-29 07:01:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:19,819 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 07:01:19,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 1 [2023-11-29 07:01:19,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:19,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-29 07:01:20,016 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 10 treesize of output 4 [2023-11-29 07:01:20,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:20,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 158 [2023-11-29 07:01:20,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2023-11-29 07:01:20,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:20,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 182 [2023-11-29 07:01:21,242 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 10 treesize of output 4 [2023-11-29 07:01:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:21,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2023-11-29 07:01:21,453 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 10 treesize of output 4 [2023-11-29 07:01:21,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:21,534 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 58 treesize of output 54 [2023-11-29 07:01:21,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:21,598 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 98 treesize of output 92 [2023-11-29 07:01:22,043 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 07:01:22,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2023-11-29 07:01:22,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:22,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 380 [2023-11-29 07:01:24,868 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-29 07:01:24,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2023-11-29 07:01:25,022 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 10 treesize of output 4 [2023-11-29 07:01:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:25,102 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-11-29 07:01:25,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 77 [2023-11-29 07:01:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:25,260 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 07:01:25,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 1 [2023-11-29 07:01:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:25,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:25,281 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 07:01:25,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 1 [2023-11-29 07:01:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:25,301 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 07:01:25,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 1 [2023-11-29 07:01:25,460 INFO L349 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2023-11-29 07:01:25,460 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 76 [2023-11-29 07:01:25,501 INFO L349 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2023-11-29 07:01:25,502 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 59 [2023-11-29 07:01:25,553 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-29 07:01:25,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 339 [2023-11-29 07:01:25,680 INFO L349 Elim1Store]: treesize reduction 67, result has 59.4 percent of original size [2023-11-29 07:01:25,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1073 treesize of output 1072 [2023-11-29 07:01:25,720 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 622 treesize of output 590 [2023-11-29 07:01:25,746 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 590 treesize of output 574 [2023-11-29 07:01:25,776 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 758 treesize of output 704 [2023-11-29 07:01:25,966 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 10 treesize of output 4 [2023-11-29 07:01:29,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:29,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 07:01:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:01:30,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590580352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:01:30,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:01:30,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 15] total 41 [2023-11-29 07:01:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15316117] [2023-11-29 07:01:30,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:30,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 07:01:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 07:01:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1334, Unknown=20, NotChecked=150, Total=1640 [2023-11-29 07:01:30,289 INFO L87 Difference]: Start difference. First operand 1590 states and 2235 transitions. Second operand has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 40 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 07:01:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:01:36,005 INFO L93 Difference]: Finished difference Result 2574 states and 3407 transitions. [2023-11-29 07:01:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 07:01:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 40 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2023-11-29 07:01:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:01:36,010 INFO L225 Difference]: With dead ends: 2574 [2023-11-29 07:01:36,010 INFO L226 Difference]: Without dead ends: 2574 [2023-11-29 07:01:36,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=881, Invalid=7291, Unknown=26, NotChecked=358, Total=8556 [2023-11-29 07:01:36,012 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1252 mSDsluCounter, 4364 mSDsCounter, 0 mSdLazyCounter, 3531 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 4574 SdHoareTripleChecker+Invalid, 5243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1627 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:01:36,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 4574 Invalid, 5243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3531 Invalid, 0 Unknown, 1627 Unchecked, 3.0s Time] [2023-11-29 07:01:36,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2023-11-29 07:01:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 1725. [2023-11-29 07:01:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1516 states have (on average 1.4313984168865435) internal successors, (2170), 1624 states have internal predecessors, (2170), 84 states have call successors, (84), 42 states have call predecessors, (84), 84 states have return successors, (168), 58 states have call predecessors, (168), 84 states have call successors, (168) [2023-11-29 07:01:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2422 transitions. [2023-11-29 07:01:36,043 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2422 transitions. Word has length 50 [2023-11-29 07:01:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:01:36,044 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2422 transitions. [2023-11-29 07:01:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 40 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 07:01:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2422 transitions. [2023-11-29 07:01:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 07:01:36,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:01:36,045 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:01:36,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 07:01:36,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-29 07:01:36,245 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:01:36,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash -19591997, now seen corresponding path program 1 times [2023-11-29 07:01:36,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:36,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977710162] [2023-11-29 07:01:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:36,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:37,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:01:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:01:37,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977710162] [2023-11-29 07:01:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977710162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945554993] [2023-11-29 07:01:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:37,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:37,774 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:37,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 07:01:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:37,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 07:01:37,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:38,137 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 07:01:38,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 07:01:38,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:01:38,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:01:38,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:01:38,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 07:01:38,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 07:01:38,796 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 07:01:38,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 39 [2023-11-29 07:01:39,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:39,165 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 23 treesize of output 15 [2023-11-29 07:01:39,186 INFO L349 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2023-11-29 07:01:39,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 37 [2023-11-29 07:01:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:01:39,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:39,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:39,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 106 [2023-11-29 07:01:39,742 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 76 treesize of output 74 [2023-11-29 07:01:39,991 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_~#list~0.offset| 4))) (and (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse1 (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse3 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse3 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse2))) (or (= .cse0 0) (not (= .cse0 |c_ULTIMATE.start_append_one_~list#1.base|)) (not (= (select (select .cse1 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0)))))) (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse2))) (or (= .cse4 0) (not (= (select (select .cse5 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0)) (= |c_ULTIMATE.start_create_item_~item~0#1.base| .cse4))))) (or (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse7 (let ((.cse8 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (or (= (select (select (store .cse7 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse2) 0) (not (= (select (select .cse7 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0))))) (= |c_ULTIMATE.start_create_item_~item~0#1.offset| 0)))) is different from false [2023-11-29 07:01:40,758 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 24 treesize of output 22 [2023-11-29 07:01:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:01:45,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945554993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:01:45,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:01:45,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 17] total 44 [2023-11-29 07:01:45,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959012215] [2023-11-29 07:01:45,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:45,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 07:01:45,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:45,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 07:01:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1625, Unknown=5, NotChecked=82, Total=1892 [2023-11-29 07:01:45,085 INFO L87 Difference]: Start difference. First operand 1725 states and 2422 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 41 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 07:01:47,429 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_~#list~0.offset| (* 4 |c_ULTIMATE.start_main_#t~ret30#1|))) (.cse3 (+ |c_~#list~0.offset| 4))) (and (forall ((|v_ULTIMATE.start_create_item_~item~0#1.base_37| Int)) (or (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_create_item_~item~0#1.base_37| v_ArrVal_1857))) (let ((.cse2 (store (select .cse1 |c_~#list~0.base|) .cse4 |v_ULTIMATE.start_create_item_~item~0#1.base_37|))) (let ((.cse0 (select .cse2 .cse3))) (or (= .cse0 0) (not (= .cse0 |c_~#list~0.base|)) (not (= (select (select (store .cse1 |c_~#list~0.base| .cse2) |v_ULTIMATE.start_create_item_~item~0#1.base_37|) 0) 0))))))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_item_~item~0#1.base_37|) 0)))) (forall ((|v_ULTIMATE.start_create_item_~item~0#1.base_37| Int)) (or (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_create_item_~item~0#1.base_37| v_ArrVal_1857))) (let ((.cse7 (store (select .cse6 |c_~#list~0.base|) .cse4 |v_ULTIMATE.start_create_item_~item~0#1.base_37|))) (let ((.cse5 (select .cse7 .cse3))) (or (= .cse5 0) (= .cse5 |v_ULTIMATE.start_create_item_~item~0#1.base_37|) (not (= (select (select (store .cse6 |c_~#list~0.base| .cse7) |v_ULTIMATE.start_create_item_~item~0#1.base_37|) 0) 0))))))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_item_~item~0#1.base_37|) 0)))) (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (let ((.cse8 (select (select (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse3))) (or (= .cse8 0) (not (= .cse8 |c_ULTIMATE.start_append_one_~list#1.base|)) (not (= (select (select .cse9 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0)))))) (or (= .cse3 0) (not (= (select |c_#valid| |c_~#list~0.base|) 0)) (= |c_~#list~0.base| 0)) (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse12 (let ((.cse13 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse13 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse13 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (let ((.cse11 (select (select (store .cse12 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse12 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse3))) (or (= .cse11 0) (not (= (select (select .cse12 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0)) (= |c_ULTIMATE.start_create_item_~item~0#1.base| .cse11))))) (or (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse14 (let ((.cse15 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse15 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse15 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (or (= (select (select (store .cse14 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse14 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse3) 0) (not (= (select (select .cse14 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0))))) (= |c_ULTIMATE.start_create_item_~item~0#1.offset| 0)))) is different from false [2023-11-29 07:01:50,229 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_~#list~0.offset| 4))) (and (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse1 (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse3 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse3 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse2))) (or (= .cse0 0) (not (= .cse0 |c_ULTIMATE.start_append_one_~list#1.base|)) (not (= (select (select .cse1 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0)))))) (or (= .cse2 0) (not (= (select |c_#valid| |c_~#list~0.base|) 0)) (= |c_~#list~0.base| 0)) (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse6 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse2))) (or (= .cse4 0) (not (= (select (select .cse5 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0)) (= |c_ULTIMATE.start_create_item_~item~0#1.base| .cse4))))) (or (forall ((v_ArrVal_1857 (Array Int Int))) (let ((.cse7 (let ((.cse8 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1857))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (or (= (select (select (store .cse7 |c_ULTIMATE.start_append_one_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) |c_~#list~0.base|) .cse2) 0) (not (= (select (select .cse7 |c_ULTIMATE.start_create_item_~item~0#1.base|) |c_ULTIMATE.start_create_item_~item~0#1.offset|) 0))))) (= |c_ULTIMATE.start_create_item_~item~0#1.offset| 0)))) is different from false [2023-11-29 07:01:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:01:53,303 INFO L93 Difference]: Finished difference Result 3238 states and 4379 transitions. [2023-11-29 07:01:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 07:01:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 41 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2023-11-29 07:01:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:01:53,308 INFO L225 Difference]: With dead ends: 3238 [2023-11-29 07:01:53,308 INFO L226 Difference]: Without dead ends: 3238 [2023-11-29 07:01:53,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=803, Invalid=6815, Unknown=50, NotChecked=522, Total=8190 [2023-11-29 07:01:53,310 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 791 mSDsluCounter, 3844 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 77 mSolverCounterUnsat, 326 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 4041 SdHoareTripleChecker+Invalid, 4614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 326 IncrementalHoareTripleChecker+Unknown, 1268 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:01:53,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 4041 Invalid, 4614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2943 Invalid, 326 Unknown, 1268 Unchecked, 4.5s Time] [2023-11-29 07:01:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2023-11-29 07:01:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2528. [2023-11-29 07:01:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2231 states have (on average 1.3935454952935904) internal successors, (3109), 2372 states have internal predecessors, (3109), 128 states have call successors, (128), 64 states have call predecessors, (128), 128 states have return successors, (256), 91 states have call predecessors, (256), 128 states have call successors, (256) [2023-11-29 07:01:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 3493 transitions. [2023-11-29 07:01:53,349 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 3493 transitions. Word has length 50 [2023-11-29 07:01:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:01:53,349 INFO L495 AbstractCegarLoop]: Abstraction has 2528 states and 3493 transitions. [2023-11-29 07:01:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 41 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 07:01:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 3493 transitions. [2023-11-29 07:01:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 07:01:53,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:01:53,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-11-29 07:01:53,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 07:01:53,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-29 07:01:53,550 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:01:53,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:53,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1254431965, now seen corresponding path program 1 times [2023-11-29 07:01:53,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:53,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045280465] [2023-11-29 07:01:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:53,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:01:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:54,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 07:01:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:01:54,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:54,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045280465] [2023-11-29 07:01:54,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045280465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:54,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653682986] [2023-11-29 07:01:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:54,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:54,211 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:54,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 07:01:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:54,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 07:01:54,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:54,483 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 [2023-11-29 07:01:54,841 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 15 treesize of output 1 [2023-11-29 07:01:54,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 07:01:55,064 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-29 07:01:55,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-29 07:01:55,129 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 17 treesize of output 9 [2023-11-29 07:01:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:01:55,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653682986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:55,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:01:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2023-11-29 07:01:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222607875] [2023-11-29 07:01:55,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:55,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 07:01:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 07:01:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-11-29 07:01:55,226 INFO L87 Difference]: Start difference. First operand 2528 states and 3493 transitions. Second operand has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 20 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:01:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:01:56,858 INFO L93 Difference]: Finished difference Result 3302 states and 4518 transitions. [2023-11-29 07:01:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 07:01:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 20 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-11-29 07:01:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:01:56,863 INFO L225 Difference]: With dead ends: 3302 [2023-11-29 07:01:56,863 INFO L226 Difference]: Without dead ends: 3302 [2023-11-29 07:01:56,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 07:01:56,864 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 608 mSDsluCounter, 2235 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:01:56,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2468 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 07:01:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2023-11-29 07:01:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2566. [2023-11-29 07:01:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 2269 states have (on average 1.3909211106214192) internal successors, (3156), 2406 states have internal predecessors, (3156), 128 states have call successors, (128), 64 states have call predecessors, (128), 128 states have return successors, (256), 95 states have call predecessors, (256), 128 states have call successors, (256) [2023-11-29 07:01:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3540 transitions. [2023-11-29 07:01:56,925 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3540 transitions. Word has length 51 [2023-11-29 07:01:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:01:56,925 INFO L495 AbstractCegarLoop]: Abstraction has 2566 states and 3540 transitions. [2023-11-29 07:01:56,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 20 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:01:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3540 transitions. [2023-11-29 07:01:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 07:01:56,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:01:56,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-11-29 07:01:56,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 07:01:57,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 07:01:57,127 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:01:57,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1254431966, now seen corresponding path program 1 times [2023-11-29 07:01:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:57,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715948285] [2023-11-29 07:01:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:57,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:57,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:01:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:57,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 07:01:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:01:57,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:57,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715948285] [2023-11-29 07:01:57,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715948285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:57,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260723923] [2023-11-29 07:01:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:57,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:57,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:57,981 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:57,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 07:01:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:58,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 07:01:58,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:58,275 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 [2023-11-29 07:01:58,278 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 [2023-11-29 07:01:58,716 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 15 treesize of output 1 [2023-11-29 07:01:58,721 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 [2023-11-29 07:01:58,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:01:58,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-11-29 07:01:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:01:59,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 07:01:59,128 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-29 07:01:59,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 07:01:59,278 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 17 treesize of output 9 [2023-11-29 07:01:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:01:59,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:59,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260723923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:59,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:01:59,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-11-29 07:01:59,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049183039] [2023-11-29 07:01:59,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:59,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 07:01:59,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:59,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 07:01:59,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2023-11-29 07:01:59,565 INFO L87 Difference]: Start difference. First operand 2566 states and 3540 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 23 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:02:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:01,610 INFO L93 Difference]: Finished difference Result 3180 states and 4352 transitions. [2023-11-29 07:02:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 07:02:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 23 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-11-29 07:02:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:01,614 INFO L225 Difference]: With dead ends: 3180 [2023-11-29 07:02:01,614 INFO L226 Difference]: Without dead ends: 3180 [2023-11-29 07:02:01,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 07:02:01,614 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 724 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:01,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 2744 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 07:02:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2023-11-29 07:02:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2518. [2023-11-29 07:02:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2221 states have (on average 1.3939666816749212) internal successors, (3096), 2363 states have internal predecessors, (3096), 128 states have call successors, (128), 64 states have call predecessors, (128), 128 states have return successors, (256), 90 states have call predecessors, (256), 128 states have call successors, (256) [2023-11-29 07:02:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3480 transitions. [2023-11-29 07:02:01,654 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3480 transitions. Word has length 51 [2023-11-29 07:02:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:01,654 INFO L495 AbstractCegarLoop]: Abstraction has 2518 states and 3480 transitions. [2023-11-29 07:02:01,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 23 states have internal predecessors, (90), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:02:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3480 transitions. [2023-11-29 07:02:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 07:02:01,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:01,655 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:01,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 07:02:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 07:02:01,855 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:01,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1847294088, now seen corresponding path program 1 times [2023-11-29 07:02:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324446392] [2023-11-29 07:02:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:02,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:02,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324446392] [2023-11-29 07:02:02,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324446392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:02,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059169098] [2023-11-29 07:02:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:02,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:02,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:02,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:02,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 07:02:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:02,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 07:02:02,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:03,076 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 [2023-11-29 07:02:03,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 07:02:03,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2023-11-29 07:02:03,380 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 [2023-11-29 07:02:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:03,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:02:03,514 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 106 treesize of output 102 [2023-11-29 07:02:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059169098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:04,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:02:04,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2023-11-29 07:02:04,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5162931] [2023-11-29 07:02:04,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:02:04,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 07:02:04,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 07:02:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2023-11-29 07:02:04,663 INFO L87 Difference]: Start difference. First operand 2518 states and 3480 transitions. Second operand has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:05,923 INFO L93 Difference]: Finished difference Result 2609 states and 3581 transitions. [2023-11-29 07:02:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 07:02:05,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2023-11-29 07:02:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:05,929 INFO L225 Difference]: With dead ends: 2609 [2023-11-29 07:02:05,929 INFO L226 Difference]: Without dead ends: 2591 [2023-11-29 07:02:05,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 07:02:05,930 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 450 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:05,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1220 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 07:02:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2023-11-29 07:02:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2536. [2023-11-29 07:02:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2238 states have (on average 1.3927613941018766) internal successors, (3117), 2380 states have internal predecessors, (3117), 129 states have call successors, (129), 64 states have call predecessors, (129), 128 states have return successors, (258), 91 states have call predecessors, (258), 129 states have call successors, (258) [2023-11-29 07:02:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 3504 transitions. [2023-11-29 07:02:05,964 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 3504 transitions. Word has length 51 [2023-11-29 07:02:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:05,965 INFO L495 AbstractCegarLoop]: Abstraction has 2536 states and 3504 transitions. [2023-11-29 07:02:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 3504 transitions. [2023-11-29 07:02:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 07:02:05,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:05,966 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:05,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 07:02:06,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 07:02:06,167 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:06,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2054646198, now seen corresponding path program 1 times [2023-11-29 07:02:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975902119] [2023-11-29 07:02:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:06,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:06,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975902119] [2023-11-29 07:02:06,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975902119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938227835] [2023-11-29 07:02:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:06,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:06,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:06,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 07:02:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:06,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 07:02:06,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:07,204 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 19 treesize of output 1 [2023-11-29 07:02:07,456 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 07:02:07,457 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-29 07:02:07,478 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 [2023-11-29 07:02:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:07,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:02:07,570 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 44 treesize of output 38 [2023-11-29 07:02:08,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938227835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:08,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:02:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 07:02:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074017258] [2023-11-29 07:02:08,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:02:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 07:02:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 07:02:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2023-11-29 07:02:08,655 INFO L87 Difference]: Start difference. First operand 2536 states and 3504 transitions. Second operand has 19 states, 18 states have (on average 5.222222222222222) internal successors, (94), 19 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:09,677 INFO L93 Difference]: Finished difference Result 2569 states and 3539 transitions. [2023-11-29 07:02:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:02:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.222222222222222) internal successors, (94), 19 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2023-11-29 07:02:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:09,682 INFO L225 Difference]: With dead ends: 2569 [2023-11-29 07:02:09,682 INFO L226 Difference]: Without dead ends: 2558 [2023-11-29 07:02:09,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2023-11-29 07:02:09,682 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 289 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:09,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 1129 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 07:02:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2023-11-29 07:02:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2536. [2023-11-29 07:02:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2238 states have (on average 1.3918677390527256) internal successors, (3115), 2380 states have internal predecessors, (3115), 129 states have call successors, (129), 64 states have call predecessors, (129), 128 states have return successors, (258), 91 states have call predecessors, (258), 129 states have call successors, (258) [2023-11-29 07:02:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 3502 transitions. [2023-11-29 07:02:09,712 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 3502 transitions. Word has length 51 [2023-11-29 07:02:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:09,712 INFO L495 AbstractCegarLoop]: Abstraction has 2536 states and 3502 transitions. [2023-11-29 07:02:09,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.222222222222222) internal successors, (94), 19 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 3502 transitions. [2023-11-29 07:02:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 07:02:09,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:09,713 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:09,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 07:02:09,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-29 07:02:09,913 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:09,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash -607353165, now seen corresponding path program 1 times [2023-11-29 07:02:09,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:09,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722410938] [2023-11-29 07:02:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:09,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:10,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:10,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:10,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722410938] [2023-11-29 07:02:10,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722410938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:10,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602787570] [2023-11-29 07:02:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:10,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:10,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:10,463 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:10,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 07:02:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:10,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 07:02:10,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:11,279 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 13 treesize of output 9 [2023-11-29 07:02:11,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 28 [2023-11-29 07:02:11,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2023-11-29 07:02:11,572 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 [2023-11-29 07:02:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:11,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:02:11,727 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 112 treesize of output 106 [2023-11-29 07:02:17,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602787570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:17,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:02:17,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-11-29 07:02:17,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970347468] [2023-11-29 07:02:17,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:02:17,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 07:02:17,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 07:02:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=711, Unknown=1, NotChecked=0, Total=812 [2023-11-29 07:02:17,920 INFO L87 Difference]: Start difference. First operand 2536 states and 3502 transitions. Second operand has 22 states, 21 states have (on average 4.476190476190476) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:19,150 INFO L93 Difference]: Finished difference Result 2571 states and 3541 transitions. [2023-11-29 07:02:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 07:02:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.476190476190476) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2023-11-29 07:02:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:19,156 INFO L225 Difference]: With dead ends: 2571 [2023-11-29 07:02:19,157 INFO L226 Difference]: Without dead ends: 2560 [2023-11-29 07:02:19,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=185, Invalid=1146, Unknown=1, NotChecked=0, Total=1332 [2023-11-29 07:02:19,157 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 285 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:19,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1555 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 07:02:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2023-11-29 07:02:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2534. [2023-11-29 07:02:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2236 states have (on average 1.3917710196779964) internal successors, (3112), 2378 states have internal predecessors, (3112), 129 states have call successors, (129), 64 states have call predecessors, (129), 128 states have return successors, (258), 91 states have call predecessors, (258), 129 states have call successors, (258) [2023-11-29 07:02:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3499 transitions. [2023-11-29 07:02:19,208 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3499 transitions. Word has length 51 [2023-11-29 07:02:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:19,208 INFO L495 AbstractCegarLoop]: Abstraction has 2534 states and 3499 transitions. [2023-11-29 07:02:19,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.476190476190476) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3499 transitions. [2023-11-29 07:02:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 07:02:19,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:19,209 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:19,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 07:02:19,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:19,410 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:19,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1898267264, now seen corresponding path program 1 times [2023-11-29 07:02:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:19,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695236400] [2023-11-29 07:02:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:19,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:19,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:19,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695236400] [2023-11-29 07:02:19,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695236400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:19,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:19,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:02:19,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592977885] [2023-11-29 07:02:19,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:19,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:02:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:02:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:02:19,547 INFO L87 Difference]: Start difference. First operand 2534 states and 3499 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 07:02:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:19,692 INFO L93 Difference]: Finished difference Result 3247 states and 4505 transitions. [2023-11-29 07:02:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:02:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-11-29 07:02:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:19,698 INFO L225 Difference]: With dead ends: 3247 [2023-11-29 07:02:19,698 INFO L226 Difference]: Without dead ends: 3247 [2023-11-29 07:02:19,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:02:19,698 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 124 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:19,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 564 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:02:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2023-11-29 07:02:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3037. [2023-11-29 07:02:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 2739 states have (on average 1.4001460387002556) internal successors, (3835), 2817 states have internal predecessors, (3835), 129 states have call successors, (129), 64 states have call predecessors, (129), 128 states have return successors, (258), 155 states have call predecessors, (258), 129 states have call successors, (258) [2023-11-29 07:02:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 4222 transitions. [2023-11-29 07:02:19,739 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 4222 transitions. Word has length 53 [2023-11-29 07:02:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:19,739 INFO L495 AbstractCegarLoop]: Abstraction has 3037 states and 4222 transitions. [2023-11-29 07:02:19,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 07:02:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 4222 transitions. [2023-11-29 07:02:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 07:02:19,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:19,740 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:19,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2023-11-29 07:02:19,740 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:19,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1604864257, now seen corresponding path program 1 times [2023-11-29 07:02:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:19,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73544692] [2023-11-29 07:02:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:19,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:19,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73544692] [2023-11-29 07:02:19,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73544692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:19,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:19,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:02:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816241969] [2023-11-29 07:02:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:19,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:02:19,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:02:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:02:19,843 INFO L87 Difference]: Start difference. First operand 3037 states and 4222 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 07:02:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:19,988 INFO L93 Difference]: Finished difference Result 3245 states and 4501 transitions. [2023-11-29 07:02:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:02:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-11-29 07:02:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:19,994 INFO L225 Difference]: With dead ends: 3245 [2023-11-29 07:02:19,994 INFO L226 Difference]: Without dead ends: 3245 [2023-11-29 07:02:19,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:02:19,995 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 156 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:19,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 560 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:02:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2023-11-29 07:02:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2532. [2023-11-29 07:02:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 2236 states have (on average 1.3899821109123434) internal successors, (3108), 2376 states have internal predecessors, (3108), 129 states have call successors, (129), 64 states have call predecessors, (129), 128 states have return successors, (258), 91 states have call predecessors, (258), 129 states have call successors, (258) [2023-11-29 07:02:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 3495 transitions. [2023-11-29 07:02:20,038 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 3495 transitions. Word has length 53 [2023-11-29 07:02:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:20,039 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 3495 transitions. [2023-11-29 07:02:20,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 07:02:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 3495 transitions. [2023-11-29 07:02:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 07:02:20,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:20,040 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:20,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2023-11-29 07:02:20,040 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:20,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1283254618, now seen corresponding path program 1 times [2023-11-29 07:02:20,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:20,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341971136] [2023-11-29 07:02:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:20,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:20,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:20,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:20,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341971136] [2023-11-29 07:02:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341971136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:20,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 07:02:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883217859] [2023-11-29 07:02:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 07:02:20,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 07:02:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 07:02:20,650 INFO L87 Difference]: Start difference. First operand 2532 states and 3495 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:21,255 INFO L93 Difference]: Finished difference Result 3355 states and 4577 transitions. [2023-11-29 07:02:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 07:02:21,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 07:02:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:21,260 INFO L225 Difference]: With dead ends: 3355 [2023-11-29 07:02:21,260 INFO L226 Difference]: Without dead ends: 3355 [2023-11-29 07:02:21,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:02:21,261 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 375 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:21,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 792 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:02:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2023-11-29 07:02:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 2849. [2023-11-29 07:02:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2534 states have (on average 1.3804262036306236) internal successors, (3498), 2654 states have internal predecessors, (3498), 139 states have call successors, (139), 69 states have call predecessors, (139), 138 states have return successors, (278), 125 states have call predecessors, (278), 139 states have call successors, (278) [2023-11-29 07:02:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 3915 transitions. [2023-11-29 07:02:21,303 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 3915 transitions. Word has length 54 [2023-11-29 07:02:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:21,303 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 3915 transitions. [2023-11-29 07:02:21,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 3915 transitions. [2023-11-29 07:02:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 07:02:21,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:21,304 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:21,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2023-11-29 07:02:21,304 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:21,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:21,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1283254617, now seen corresponding path program 1 times [2023-11-29 07:02:21,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:21,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273776909] [2023-11-29 07:02:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:21,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:22,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:22,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:22,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:22,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273776909] [2023-11-29 07:02:22,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273776909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:22,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 07:02:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249027677] [2023-11-29 07:02:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:22,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 07:02:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 07:02:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-29 07:02:22,107 INFO L87 Difference]: Start difference. First operand 2849 states and 3915 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:23,193 INFO L93 Difference]: Finished difference Result 3501 states and 4798 transitions. [2023-11-29 07:02:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 07:02:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 07:02:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:23,199 INFO L225 Difference]: With dead ends: 3501 [2023-11-29 07:02:23,199 INFO L226 Difference]: Without dead ends: 3501 [2023-11-29 07:02:23,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2023-11-29 07:02:23,200 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 447 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:23,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1202 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 07:02:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2023-11-29 07:02:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 2981. [2023-11-29 07:02:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2662 states have (on average 1.393313298271976) internal successors, (3709), 2776 states have internal predecessors, (3709), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 134 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4132 transitions. [2023-11-29 07:02:23,256 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4132 transitions. Word has length 54 [2023-11-29 07:02:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:23,256 INFO L495 AbstractCegarLoop]: Abstraction has 2981 states and 4132 transitions. [2023-11-29 07:02:23,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4132 transitions. [2023-11-29 07:02:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 07:02:23,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:23,257 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:23,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2023-11-29 07:02:23,258 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:23,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1283279629, now seen corresponding path program 1 times [2023-11-29 07:02:23,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:23,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665966478] [2023-11-29 07:02:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:23,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:23,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:23,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:23,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665966478] [2023-11-29 07:02:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665966478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 07:02:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842742103] [2023-11-29 07:02:23,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:23,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:02:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:02:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:02:23,567 INFO L87 Difference]: Start difference. First operand 2981 states and 4132 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:23,945 INFO L93 Difference]: Finished difference Result 3382 states and 4633 transitions. [2023-11-29 07:02:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:02:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 07:02:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:23,952 INFO L225 Difference]: With dead ends: 3382 [2023-11-29 07:02:23,953 INFO L226 Difference]: Without dead ends: 3382 [2023-11-29 07:02:23,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-29 07:02:23,953 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 221 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:23,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 806 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:02:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2023-11-29 07:02:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 2981. [2023-11-29 07:02:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2662 states have (on average 1.3903080390683697) internal successors, (3701), 2776 states have internal predecessors, (3701), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 134 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4124 transitions. [2023-11-29 07:02:23,998 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4124 transitions. Word has length 54 [2023-11-29 07:02:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:23,998 INFO L495 AbstractCegarLoop]: Abstraction has 2981 states and 4124 transitions. [2023-11-29 07:02:23,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4124 transitions. [2023-11-29 07:02:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 07:02:24,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:24,000 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:24,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2023-11-29 07:02:24,000 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:24,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1788813243, now seen corresponding path program 1 times [2023-11-29 07:02:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:24,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878494368] [2023-11-29 07:02:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:24,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:24,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:24,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:24,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878494368] [2023-11-29 07:02:24,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878494368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:24,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-29 07:02:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226597429] [2023-11-29 07:02:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 07:02:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 07:02:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-29 07:02:24,756 INFO L87 Difference]: Start difference. First operand 2981 states and 4124 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:25,697 INFO L93 Difference]: Finished difference Result 3365 states and 4605 transitions. [2023-11-29 07:02:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 07:02:25,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 07:02:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:25,703 INFO L225 Difference]: With dead ends: 3365 [2023-11-29 07:02:25,703 INFO L226 Difference]: Without dead ends: 3365 [2023-11-29 07:02:25,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2023-11-29 07:02:25,703 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 327 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:25,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1201 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 07:02:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2023-11-29 07:02:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2988. [2023-11-29 07:02:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2669 states have (on average 1.3915324091420007) internal successors, (3714), 2783 states have internal predecessors, (3714), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 134 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 4137 transitions. [2023-11-29 07:02:25,746 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 4137 transitions. Word has length 54 [2023-11-29 07:02:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:25,746 INFO L495 AbstractCegarLoop]: Abstraction has 2988 states and 4137 transitions. [2023-11-29 07:02:25,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 4137 transitions. [2023-11-29 07:02:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 07:02:25,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:25,748 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:25,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2023-11-29 07:02:25,748 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:25,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1788813242, now seen corresponding path program 1 times [2023-11-29 07:02:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:25,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700950665] [2023-11-29 07:02:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:25,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:26,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:26,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:26,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700950665] [2023-11-29 07:02:26,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700950665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:26,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:26,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 07:02:26,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217614110] [2023-11-29 07:02:26,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:26,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:02:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:02:26,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:02:26,464 INFO L87 Difference]: Start difference. First operand 2988 states and 4137 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:26,972 INFO L93 Difference]: Finished difference Result 3348 states and 4579 transitions. [2023-11-29 07:02:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:02:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 07:02:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:26,977 INFO L225 Difference]: With dead ends: 3348 [2023-11-29 07:02:26,977 INFO L226 Difference]: Without dead ends: 3348 [2023-11-29 07:02:26,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-29 07:02:26,978 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 314 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:26,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 728 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:02:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2023-11-29 07:02:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2873. [2023-11-29 07:02:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2554 states have (on average 1.390368050117463) internal successors, (3551), 2683 states have internal predecessors, (3551), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 119 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 3974 transitions. [2023-11-29 07:02:27,029 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 3974 transitions. Word has length 54 [2023-11-29 07:02:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:27,029 INFO L495 AbstractCegarLoop]: Abstraction has 2873 states and 3974 transitions. [2023-11-29 07:02:27,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 3974 transitions. [2023-11-29 07:02:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 07:02:27,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:27,031 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:27,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2023-11-29 07:02:27,031 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:27,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1159284264, now seen corresponding path program 1 times [2023-11-29 07:02:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:27,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609579622] [2023-11-29 07:02:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:27,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:27,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:27,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:27,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:27,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609579622] [2023-11-29 07:02:27,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609579622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:27,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659413907] [2023-11-29 07:02:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:27,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:27,613 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:27,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 07:02:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:27,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 07:02:27,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:27,968 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 [2023-11-29 07:02:28,315 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 15 treesize of output 1 [2023-11-29 07:02:28,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 07:02:28,634 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 17 treesize of output 9 [2023-11-29 07:02:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:28,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:02:28,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659413907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:28,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:02:28,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 24 [2023-11-29 07:02:28,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807097718] [2023-11-29 07:02:28,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:28,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 07:02:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 07:02:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:02:28,657 INFO L87 Difference]: Start difference. First operand 2873 states and 3974 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:29,985 INFO L93 Difference]: Finished difference Result 3605 states and 4928 transitions. [2023-11-29 07:02:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 07:02:29,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 07:02:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:29,989 INFO L225 Difference]: With dead ends: 3605 [2023-11-29 07:02:29,989 INFO L226 Difference]: Without dead ends: 3605 [2023-11-29 07:02:29,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 07:02:29,990 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 426 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:29,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1777 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 07:02:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2023-11-29 07:02:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2910. [2023-11-29 07:02:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2591 states have (on average 1.3925125434195291) internal successors, (3608), 2716 states have internal predecessors, (3608), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 123 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4031 transitions. [2023-11-29 07:02:30,042 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4031 transitions. Word has length 54 [2023-11-29 07:02:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:30,042 INFO L495 AbstractCegarLoop]: Abstraction has 2910 states and 4031 transitions. [2023-11-29 07:02:30,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4031 transitions. [2023-11-29 07:02:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 07:02:30,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:30,043 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:30,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 07:02:30,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-11-29 07:02:30,244 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:30,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1159284265, now seen corresponding path program 1 times [2023-11-29 07:02:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447086969] [2023-11-29 07:02:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:30,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:30,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447086969] [2023-11-29 07:02:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447086969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761761312] [2023-11-29 07:02:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:30,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:30,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:30,825 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:30,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 07:02:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:31,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 07:02:31,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:31,430 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 [2023-11-29 07:02:31,435 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 [2023-11-29 07:02:31,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:02:31,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 07:02:31,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-11-29 07:02:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:31,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:02:31,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761761312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:31,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:02:31,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 24 [2023-11-29 07:02:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780325728] [2023-11-29 07:02:31,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:31,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 07:02:31,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 07:02:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:02:31,959 INFO L87 Difference]: Start difference. First operand 2910 states and 4031 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:33,099 INFO L93 Difference]: Finished difference Result 3845 states and 5252 transitions. [2023-11-29 07:02:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 07:02:33,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-11-29 07:02:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:33,104 INFO L225 Difference]: With dead ends: 3845 [2023-11-29 07:02:33,104 INFO L226 Difference]: Without dead ends: 3845 [2023-11-29 07:02:33,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 07:02:33,105 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 387 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:33,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1970 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 07:02:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3845 states. [2023-11-29 07:02:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3845 to 2808. [2023-11-29 07:02:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2489 states have (on average 1.3905182804339091) internal successors, (3461), 2627 states have internal predecessors, (3461), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 110 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3884 transitions. [2023-11-29 07:02:33,150 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3884 transitions. Word has length 54 [2023-11-29 07:02:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:33,151 INFO L495 AbstractCegarLoop]: Abstraction has 2808 states and 3884 transitions. [2023-11-29 07:02:33,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3884 transitions. [2023-11-29 07:02:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 07:02:33,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:33,152 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:33,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 07:02:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-11-29 07:02:33,353 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:33,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1126962593, now seen corresponding path program 1 times [2023-11-29 07:02:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114394225] [2023-11-29 07:02:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:33,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:33,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:33,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114394225] [2023-11-29 07:02:33,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114394225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:33,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:33,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 07:02:33,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635934521] [2023-11-29 07:02:33,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:33,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:02:33,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:02:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:02:33,638 INFO L87 Difference]: Start difference. First operand 2808 states and 3884 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:34,088 INFO L93 Difference]: Finished difference Result 3205 states and 4382 transitions. [2023-11-29 07:02:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:02:34,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-11-29 07:02:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:34,092 INFO L225 Difference]: With dead ends: 3205 [2023-11-29 07:02:34,092 INFO L226 Difference]: Without dead ends: 3205 [2023-11-29 07:02:34,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-29 07:02:34,092 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 213 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:34,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 741 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:02:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2023-11-29 07:02:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2808. [2023-11-29 07:02:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2489 states have (on average 1.3873041382081157) internal successors, (3453), 2627 states have internal predecessors, (3453), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 110 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3876 transitions. [2023-11-29 07:02:34,130 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3876 transitions. Word has length 55 [2023-11-29 07:02:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:34,130 INFO L495 AbstractCegarLoop]: Abstraction has 2808 states and 3876 transitions. [2023-11-29 07:02:34,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3876 transitions. [2023-11-29 07:02:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 07:02:34,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:34,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:34,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2023-11-29 07:02:34,131 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:34,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash 762799340, now seen corresponding path program 1 times [2023-11-29 07:02:34,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:34,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466535996] [2023-11-29 07:02:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:34,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:34,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:34,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 07:02:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 07:02:34,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466535996] [2023-11-29 07:02:34,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466535996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:34,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:34,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:02:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246434653] [2023-11-29 07:02:34,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:34,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:02:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:02:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:02:34,197 INFO L87 Difference]: Start difference. First operand 2808 states and 3876 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:02:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:34,352 INFO L93 Difference]: Finished difference Result 2810 states and 3871 transitions. [2023-11-29 07:02:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:02:34,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-11-29 07:02:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:34,356 INFO L225 Difference]: With dead ends: 2810 [2023-11-29 07:02:34,356 INFO L226 Difference]: Without dead ends: 2810 [2023-11-29 07:02:34,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:02:34,356 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 41 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:34,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 336 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:02:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2023-11-29 07:02:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2808. [2023-11-29 07:02:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2489 states have (on average 1.3852952993169947) internal successors, (3448), 2627 states have internal predecessors, (3448), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 110 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3871 transitions. [2023-11-29 07:02:34,386 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3871 transitions. Word has length 55 [2023-11-29 07:02:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:34,386 INFO L495 AbstractCegarLoop]: Abstraction has 2808 states and 3871 transitions. [2023-11-29 07:02:34,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:02:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3871 transitions. [2023-11-29 07:02:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 07:02:34,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:34,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:34,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2023-11-29 07:02:34,387 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:34,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:34,387 INFO L85 PathProgramCache]: Analyzing trace with hash 762799341, now seen corresponding path program 1 times [2023-11-29 07:02:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:34,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707555195] [2023-11-29 07:02:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:34,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:34,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 07:02:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 07:02:34,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:34,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707555195] [2023-11-29 07:02:34,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707555195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:34,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:34,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:02:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786704697] [2023-11-29 07:02:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:34,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:02:34,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:34,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:02:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:02:34,490 INFO L87 Difference]: Start difference. First operand 2808 states and 3871 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:02:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:34,697 INFO L93 Difference]: Finished difference Result 2804 states and 3830 transitions. [2023-11-29 07:02:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:02:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-11-29 07:02:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:34,701 INFO L225 Difference]: With dead ends: 2804 [2023-11-29 07:02:34,702 INFO L226 Difference]: Without dead ends: 2804 [2023-11-29 07:02:34,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:02:34,702 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 34 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:34,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 366 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 07:02:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2023-11-29 07:02:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2800. [2023-11-29 07:02:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2485 states have (on average 1.369416498993964) internal successors, (3403), 2619 states have internal predecessors, (3403), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 110 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 3826 transitions. [2023-11-29 07:02:34,740 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 3826 transitions. Word has length 55 [2023-11-29 07:02:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:34,740 INFO L495 AbstractCegarLoop]: Abstraction has 2800 states and 3826 transitions. [2023-11-29 07:02:34,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:02:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 3826 transitions. [2023-11-29 07:02:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 07:02:34,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:34,741 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:34,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2023-11-29 07:02:34,741 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:34,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash -576101771, now seen corresponding path program 1 times [2023-11-29 07:02:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156192439] [2023-11-29 07:02:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:35,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:35,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:35,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:35,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156192439] [2023-11-29 07:02:35,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156192439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:35,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:35,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 07:02:35,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644052561] [2023-11-29 07:02:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:35,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:02:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:02:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:02:35,036 INFO L87 Difference]: Start difference. First operand 2800 states and 3826 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:35,438 INFO L93 Difference]: Finished difference Result 3205 states and 4311 transitions. [2023-11-29 07:02:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 07:02:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2023-11-29 07:02:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:35,442 INFO L225 Difference]: With dead ends: 3205 [2023-11-29 07:02:35,442 INFO L226 Difference]: Without dead ends: 3205 [2023-11-29 07:02:35,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-29 07:02:35,443 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 193 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:35,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 669 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:02:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2023-11-29 07:02:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2836. [2023-11-29 07:02:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2521 states have (on average 1.368107893692979) internal successors, (3449), 2655 states have internal predecessors, (3449), 141 states have call successors, (141), 70 states have call predecessors, (141), 140 states have return successors, (282), 110 states have call predecessors, (282), 141 states have call successors, (282) [2023-11-29 07:02:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 3872 transitions. [2023-11-29 07:02:35,480 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 3872 transitions. Word has length 56 [2023-11-29 07:02:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:35,480 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 3872 transitions. [2023-11-29 07:02:35,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 3872 transitions. [2023-11-29 07:02:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 07:02:35,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:35,481 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:35,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2023-11-29 07:02:35,481 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:35,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:35,482 INFO L85 PathProgramCache]: Analyzing trace with hash -679285471, now seen corresponding path program 1 times [2023-11-29 07:02:35,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:35,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078355911] [2023-11-29 07:02:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:35,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:35,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:35,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078355911] [2023-11-29 07:02:35,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078355911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:35,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131043211] [2023-11-29 07:02:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:35,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:35,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:35,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 07:02:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:36,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 07:02:36,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:36,236 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 07:02:36,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 07:02:36,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 07:02:36,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 07:02:37,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-11-29 07:02:37,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 07:02:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:37,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:02:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131043211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:37,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:02:37,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 23 [2023-11-29 07:02:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636058004] [2023-11-29 07:02:37,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:37,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 07:02:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:37,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 07:02:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:02:37,178 INFO L87 Difference]: Start difference. First operand 2836 states and 3872 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:38,157 INFO L93 Difference]: Finished difference Result 3913 states and 5313 transitions. [2023-11-29 07:02:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 07:02:38,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2023-11-29 07:02:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:38,162 INFO L225 Difference]: With dead ends: 3913 [2023-11-29 07:02:38,162 INFO L226 Difference]: Without dead ends: 3913 [2023-11-29 07:02:38,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 07:02:38,163 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 254 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:38,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1038 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 07:02:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2023-11-29 07:02:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3255. [2023-11-29 07:02:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2896 states have (on average 1.3712016574585635) internal successors, (3971), 3045 states have internal predecessors, (3971), 163 states have call successors, (163), 81 states have call predecessors, (163), 162 states have return successors, (326), 128 states have call predecessors, (326), 163 states have call successors, (326) [2023-11-29 07:02:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4460 transitions. [2023-11-29 07:02:38,227 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4460 transitions. Word has length 57 [2023-11-29 07:02:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:38,227 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 4460 transitions. [2023-11-29 07:02:38,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4460 transitions. [2023-11-29 07:02:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 07:02:38,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:38,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-11-29 07:02:38,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 07:02:38,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:38,429 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:38,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1391018478, now seen corresponding path program 1 times [2023-11-29 07:02:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:38,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690184536] [2023-11-29 07:02:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:38,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:38,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 07:02:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 07:02:38,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:38,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690184536] [2023-11-29 07:02:38,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690184536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:38,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:38,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:02:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372588255] [2023-11-29 07:02:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:38,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:02:38,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:38,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:02:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:02:38,502 INFO L87 Difference]: Start difference. First operand 3255 states and 4460 transitions. Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:02:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:38,678 INFO L93 Difference]: Finished difference Result 3317 states and 4494 transitions. [2023-11-29 07:02:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:02:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-11-29 07:02:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:38,683 INFO L225 Difference]: With dead ends: 3317 [2023-11-29 07:02:38,683 INFO L226 Difference]: Without dead ends: 3317 [2023-11-29 07:02:38,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:02:38,683 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 22 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:38,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 338 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 07:02:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2023-11-29 07:02:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 3253. [2023-11-29 07:02:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 2896 states have (on average 1.360842541436464) internal successors, (3941), 3043 states have internal predecessors, (3941), 163 states have call successors, (163), 81 states have call predecessors, (163), 162 states have return successors, (326), 128 states have call predecessors, (326), 163 states have call successors, (326) [2023-11-29 07:02:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 4430 transitions. [2023-11-29 07:02:38,728 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 4430 transitions. Word has length 57 [2023-11-29 07:02:38,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:38,729 INFO L495 AbstractCegarLoop]: Abstraction has 3253 states and 4430 transitions. [2023-11-29 07:02:38,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:02:38,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 4430 transitions. [2023-11-29 07:02:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 07:02:38,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:38,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-11-29 07:02:38,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2023-11-29 07:02:38,730 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:38,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1391018477, now seen corresponding path program 1 times [2023-11-29 07:02:38,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:38,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544256433] [2023-11-29 07:02:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:38,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:39,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:39,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 07:02:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:39,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544256433] [2023-11-29 07:02:39,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544256433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:39,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340614927] [2023-11-29 07:02:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:39,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:39,376 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:39,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 07:02:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:39,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 07:02:39,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:39,927 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 [2023-11-29 07:02:39,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:02:40,357 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 17 treesize of output 9 [2023-11-29 07:02:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:40,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:02:40,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:02:40,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 45 [2023-11-29 07:02:40,805 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 186 treesize of output 178 [2023-11-29 07:02:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:41,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340614927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:02:41,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:02:41,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 42 [2023-11-29 07:02:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962652679] [2023-11-29 07:02:41,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:02:41,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 07:02:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 07:02:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 07:02:41,094 INFO L87 Difference]: Start difference. First operand 3253 states and 4430 transitions. Second operand has 43 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 40 states have internal predecessors, (154), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 07:02:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:43,437 INFO L93 Difference]: Finished difference Result 4140 states and 5483 transitions. [2023-11-29 07:02:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 07:02:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 40 states have internal predecessors, (154), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2023-11-29 07:02:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:43,443 INFO L225 Difference]: With dead ends: 4140 [2023-11-29 07:02:43,443 INFO L226 Difference]: Without dead ends: 4140 [2023-11-29 07:02:43,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=723, Invalid=4389, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 07:02:43,444 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 943 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:43,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 2918 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 07:02:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2023-11-29 07:02:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 3406. [2023-11-29 07:02:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3046 states have (on average 1.3571897570584373) internal successors, (4134), 3186 states have internal predecessors, (4134), 165 states have call successors, (165), 82 states have call predecessors, (165), 164 states have return successors, (330), 137 states have call predecessors, (330), 165 states have call successors, (330) [2023-11-29 07:02:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 4629 transitions. [2023-11-29 07:02:43,508 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 4629 transitions. Word has length 57 [2023-11-29 07:02:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:43,508 INFO L495 AbstractCegarLoop]: Abstraction has 3406 states and 4629 transitions. [2023-11-29 07:02:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 40 states have internal predecessors, (154), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 07:02:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 4629 transitions. [2023-11-29 07:02:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 07:02:43,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:43,509 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:43,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 07:02:43,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:43,710 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:43,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1692690338, now seen corresponding path program 1 times [2023-11-29 07:02:43,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:43,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783104418] [2023-11-29 07:02:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:43,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:44,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:02:44,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:44,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783104418] [2023-11-29 07:02:44,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783104418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:44,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836448230] [2023-11-29 07:02:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:44,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:44,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:44,199 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:44,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 07:02:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:44,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 07:02:44,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:44,526 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 07:02:44,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 07:02:44,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 07:02:45,032 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 16 treesize of output 8 [2023-11-29 07:02:45,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 07:02:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:45,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:02:45,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836448230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:45,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:02:45,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 23 [2023-11-29 07:02:45,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867443855] [2023-11-29 07:02:45,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:02:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:02:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:02:45,109 INFO L87 Difference]: Start difference. First operand 3406 states and 4629 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:45,609 INFO L93 Difference]: Finished difference Result 4278 states and 5842 transitions. [2023-11-29 07:02:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:02:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2023-11-29 07:02:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:45,615 INFO L225 Difference]: With dead ends: 4278 [2023-11-29 07:02:45,616 INFO L226 Difference]: Without dead ends: 4278 [2023-11-29 07:02:45,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-11-29 07:02:45,616 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 245 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:45,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 572 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:02:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2023-11-29 07:02:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3685. [2023-11-29 07:02:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3685 states, 3293 states have (on average 1.3656240510173094) internal successors, (4497), 3447 states have internal predecessors, (4497), 181 states have call successors, (181), 90 states have call predecessors, (181), 180 states have return successors, (362), 147 states have call predecessors, (362), 181 states have call successors, (362) [2023-11-29 07:02:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3685 states to 3685 states and 5040 transitions. [2023-11-29 07:02:45,667 INFO L78 Accepts]: Start accepts. Automaton has 3685 states and 5040 transitions. Word has length 57 [2023-11-29 07:02:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:45,668 INFO L495 AbstractCegarLoop]: Abstraction has 3685 states and 5040 transitions. [2023-11-29 07:02:45,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3685 states and 5040 transitions. [2023-11-29 07:02:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 07:02:45,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:45,669 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:45,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 07:02:45,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:45,870 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:45,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash 416987127, now seen corresponding path program 1 times [2023-11-29 07:02:45,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:45,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984636138] [2023-11-29 07:02:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:45,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 07:02:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:46,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:46,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984636138] [2023-11-29 07:02:46,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984636138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:46,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:46,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 07:02:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638363403] [2023-11-29 07:02:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:46,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 07:02:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 07:02:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:02:46,088 INFO L87 Difference]: Start difference. First operand 3685 states and 5040 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:46,298 INFO L93 Difference]: Finished difference Result 3684 states and 5014 transitions. [2023-11-29 07:02:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:02:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2023-11-29 07:02:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:46,303 INFO L225 Difference]: With dead ends: 3684 [2023-11-29 07:02:46,304 INFO L226 Difference]: Without dead ends: 3684 [2023-11-29 07:02:46,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:02:46,304 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 270 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:46,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 258 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 07:02:46,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2023-11-29 07:02:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3684. [2023-11-29 07:02:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3293 states have (on average 1.3577285150318859) internal successors, (4471), 3446 states have internal predecessors, (4471), 181 states have call successors, (181), 90 states have call predecessors, (181), 180 states have return successors, (362), 147 states have call predecessors, (362), 181 states have call successors, (362) [2023-11-29 07:02:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 5014 transitions. [2023-11-29 07:02:46,354 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 5014 transitions. Word has length 58 [2023-11-29 07:02:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:46,354 INFO L495 AbstractCegarLoop]: Abstraction has 3684 states and 5014 transitions. [2023-11-29 07:02:46,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:02:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 5014 transitions. [2023-11-29 07:02:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 07:02:46,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:46,355 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2023-11-29 07:02:46,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2023-11-29 07:02:46,355 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:02:46,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:46,355 INFO L85 PathProgramCache]: Analyzing trace with hash -109407203, now seen corresponding path program 1 times [2023-11-29 07:02:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:46,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898060123] [2023-11-29 07:02:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:48,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 07:02:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:48,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 07:02:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 07:02:48,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:48,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898060123] [2023-11-29 07:02:48,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898060123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:48,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335585803] [2023-11-29 07:02:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:48,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:48,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:48,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:48,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 07:02:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:48,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-29 07:02:48,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:48,926 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 07:02:48,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 07:02:49,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 07:02:49,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 07:02:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:02:49,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 07:02:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:02:49,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 07:02:49,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:02:49,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:02:49,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:02:49,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:02:49,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:02:49,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:02:49,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-29 07:02:49,852 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 07:02:49,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 39 [2023-11-29 07:02:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:50,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:05,102 INFO L349 Elim1Store]: treesize reduction 52, result has 48.5 percent of original size [2023-11-29 07:03:05,103 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 219 [2023-11-29 07:03:05,174 INFO L349 Elim1Store]: treesize reduction 52, result has 48.5 percent of original size [2023-11-29 07:03:05,174 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 123 [2023-11-29 07:03:05,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:03:05,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1116 treesize of output 1120 [2023-11-29 07:03:05,540 INFO L349 Elim1Store]: treesize reduction 74, result has 69.3 percent of original size [2023-11-29 07:03:05,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 31956 treesize of output 29386 [2023-11-29 07:03:05,983 INFO L349 Elim1Store]: treesize reduction 60, result has 67.6 percent of original size [2023-11-29 07:03:05,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2376 treesize of output 2276 [2023-11-29 07:03:06,126 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 2540 treesize of output 2468 [2023-11-29 07:03:06,474 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 10 treesize of output 4 [2023-11-29 07:03:06,851 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 10 treesize of output 4 [2023-11-29 07:03:17,112 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 2001 treesize of output 1985 [2023-11-29 07:07:15,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-11-29 07:07:15,986 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-29 07:07:15,987 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-29 07:07:15,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:16,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:07:16,188 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:495) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.pushInner(QuantifierPusher.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:194) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2023-11-29 07:07:16,191 INFO L158 Benchmark]: Toolchain (without parser) took 543254.08ms. Allocated memory was 186.6MB in the beginning and 599.8MB in the end (delta: 413.1MB). Free memory was 139.8MB in the beginning and 371.7MB in the end (delta: -231.9MB). Peak memory consumption was 392.8MB. Max. memory is 16.1GB. [2023-11-29 07:07:16,192 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 186.6MB. Free memory is still 163.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 07:07:16,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 595.77ms. Allocated memory is still 186.6MB. Free memory was 139.8MB in the beginning and 117.6MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-29 07:07:16,192 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.97ms. Allocated memory is still 186.6MB. Free memory was 117.6MB in the beginning and 114.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 07:07:16,192 INFO L158 Benchmark]: Boogie Preprocessor took 79.96ms. Allocated memory is still 186.6MB. Free memory was 114.6MB in the beginning and 110.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 07:07:16,192 INFO L158 Benchmark]: RCFGBuilder took 716.86ms. Allocated memory is still 186.6MB. Free memory was 110.4MB in the beginning and 73.6MB in the end (delta: 36.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2023-11-29 07:07:16,192 INFO L158 Benchmark]: TraceAbstraction took 541797.51ms. Allocated memory was 186.6MB in the beginning and 599.8MB in the end (delta: 413.1MB). Free memory was 72.9MB in the beginning and 371.7MB in the end (delta: -298.8MB). Peak memory consumption was 325.7MB. Max. memory is 16.1GB. [2023-11-29 07:07:16,193 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 186.6MB. Free memory is still 163.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 595.77ms. Allocated memory is still 186.6MB. Free memory was 139.8MB in the beginning and 117.6MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.97ms. Allocated memory is still 186.6MB. Free memory was 117.6MB in the beginning and 114.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.96ms. Allocated memory is still 186.6MB. Free memory was 114.6MB in the beginning and 110.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 716.86ms. Allocated memory is still 186.6MB. Free memory was 110.4MB in the beginning and 73.6MB in the end (delta: 36.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 541797.51ms. Allocated memory was 186.6MB in the beginning and 599.8MB in the end (delta: 413.1MB). Free memory was 72.9MB in the beginning and 371.7MB in the end (delta: -298.8MB). Peak memory consumption was 325.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya --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 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 07:07:17,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 07:07:18,030 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 07:07:18,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 07:07:18,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 07:07:18,081 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 07:07:18,082 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 07:07:18,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 07:07:18,083 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 07:07:18,084 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 07:07:18,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 07:07:18,085 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 07:07:18,086 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 07:07:18,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 07:07:18,087 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 07:07:18,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 07:07:18,089 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 07:07:18,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 07:07:18,090 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 07:07:18,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 07:07:18,091 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 07:07:18,092 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 07:07:18,092 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 07:07:18,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 07:07:18,093 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 07:07:18,094 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 07:07:18,094 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 07:07:18,095 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 07:07:18,095 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 07:07:18,096 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 07:07:18,096 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 07:07:18,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 07:07:18,097 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 07:07:18,097 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 07:07:18,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:07:18,098 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 07:07:18,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 07:07:18,099 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 07:07:18,099 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 07:07:18,099 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 07:07:18,099 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 07:07:18,100 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 07:07:18,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 07:07:18,100 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 07:07:18,100 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_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2023-11-29 07:07:18,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 07:07:18,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 07:07:18,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 07:07:18,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 07:07:18,418 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 07:07:18,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/memsafety/test-0217.i [2023-11-29 07:07:21,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 07:07:21,536 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 07:07:21,537 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/sv-benchmarks/c/memsafety/test-0217.i [2023-11-29 07:07:21,554 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data/bb72b9992/94692da4a9bb4605ab60df7311dc3a89/FLAGaf0af7c72 [2023-11-29 07:07:21,569 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/data/bb72b9992/94692da4a9bb4605ab60df7311dc3a89 [2023-11-29 07:07:21,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 07:07:21,573 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 07:07:21,575 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 07:07:21,575 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 07:07:21,580 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 07:07:21,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:07:21" (1/1) ... [2023-11-29 07:07:21,582 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f04820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:21, skipping insertion in model container [2023-11-29 07:07:21,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:07:21" (1/1) ... [2023-11-29 07:07:21,645 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 07:07:22,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:07:22,073 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 07:07:22,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:07:22,178 INFO L206 MainTranslator]: Completed translation [2023-11-29 07:07:22,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22 WrapperNode [2023-11-29 07:07:22,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 07:07:22,180 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 07:07:22,180 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 07:07:22,180 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 07:07:22,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,246 INFO L138 Inliner]: procedures = 182, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-11-29 07:07:22,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 07:07:22,247 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 07:07:22,247 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 07:07:22,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 07:07:22,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,266 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,297 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 11 writes are split as follows [0, 11]. [2023-11-29 07:07:22,298 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,318 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,330 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 07:07:22,331 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 07:07:22,332 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 07:07:22,332 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 07:07:22,333 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (1/1) ... [2023-11-29 07:07:22,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:07:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:07:22,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 07:07:22,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 07:07:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-11-29 07:07:22,446 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-11-29 07:07:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 07:07:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 07:07:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 07:07:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 07:07:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 07:07:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 07:07:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2023-11-29 07:07:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2023-11-29 07:07:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 07:07:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 07:07:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 07:07:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 07:07:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 07:07:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 07:07:22,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 07:07:22,625 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 07:07:22,628 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 07:07:23,409 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 07:07:23,469 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 07:07:23,469 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 07:07:23,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:07:23 BoogieIcfgContainer [2023-11-29 07:07:23,470 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 07:07:23,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 07:07:23,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 07:07:23,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 07:07:23,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:07:21" (1/3) ... [2023-11-29 07:07:23,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfa1b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:07:23, skipping insertion in model container [2023-11-29 07:07:23,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:22" (2/3) ... [2023-11-29 07:07:23,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfa1b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:07:23, skipping insertion in model container [2023-11-29 07:07:23,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:07:23" (3/3) ... [2023-11-29 07:07:23,479 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2023-11-29 07:07:23,498 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 07:07:23,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-11-29 07:07:23,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 07:07:23,554 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;@6a57446b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 07:07:23,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-11-29 07:07:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 77 states have (on average 2.1948051948051948) internal successors, (169), 144 states have internal predecessors, (169), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:07:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 07:07:23,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:23,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 07:07:23,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:23,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash 326466752, now seen corresponding path program 1 times [2023-11-29 07:07:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:23,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742909127] [2023-11-29 07:07:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:23,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:23,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:23,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:23,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 07:07:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:23,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 07:07:23,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:23,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:23,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742909127] [2023-11-29 07:07:23,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742909127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:23,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:23,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089990922] [2023-11-29 07:07:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:23,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 07:07:23,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 07:07:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 07:07:23,794 INFO L87 Difference]: Start difference. First operand has 148 states, 77 states have (on average 2.1948051948051948) internal successors, (169), 144 states have internal predecessors, (169), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:07:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:23,922 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2023-11-29 07:07:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 07:07:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-29 07:07:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:23,934 INFO L225 Difference]: With dead ends: 148 [2023-11-29 07:07:23,934 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 07:07:23,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 07:07:23,940 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:23,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:07:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 07:07:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-29 07:07:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 77 states have (on average 2.103896103896104) internal successors, (162), 143 states have internal predecessors, (162), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:07:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 166 transitions. [2023-11-29 07:07:23,991 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 166 transitions. Word has length 5 [2023-11-29 07:07:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:23,992 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 166 transitions. [2023-11-29 07:07:23,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:07:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 166 transitions. [2023-11-29 07:07:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 07:07:23,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:23,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 07:07:24,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:24,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:24,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:24,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1299860234, now seen corresponding path program 1 times [2023-11-29 07:07:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:24,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185041019] [2023-11-29 07:07:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:24,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:24,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 07:07:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:24,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 07:07:24,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:24,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:24,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:24,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185041019] [2023-11-29 07:07:24,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185041019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:24,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:24,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 07:07:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472584601] [2023-11-29 07:07:24,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:07:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:07:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:07:24,320 INFO L87 Difference]: Start difference. First operand 147 states and 166 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2023-11-29 07:07:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:24,897 INFO L93 Difference]: Finished difference Result 287 states and 324 transitions. [2023-11-29 07:07:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:07:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2023-11-29 07:07:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:24,901 INFO L225 Difference]: With dead ends: 287 [2023-11-29 07:07:24,901 INFO L226 Difference]: Without dead ends: 287 [2023-11-29 07:07:24,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:07:24,904 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 149 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:24,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 196 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:07:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-29 07:07:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 199. [2023-11-29 07:07:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 2.0793650793650795) internal successors, (262), 192 states have internal predecessors, (262), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:07:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 270 transitions. [2023-11-29 07:07:24,929 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 270 transitions. Word has length 6 [2023-11-29 07:07:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:24,929 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 270 transitions. [2023-11-29 07:07:24,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2023-11-29 07:07:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 270 transitions. [2023-11-29 07:07:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 07:07:24,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:24,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 07:07:24,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 07:07:25,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:25,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:25,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:25,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1299860235, now seen corresponding path program 1 times [2023-11-29 07:07:25,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:25,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457579671] [2023-11-29 07:07:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:25,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:25,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:25,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:25,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 07:07:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:25,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:07:25,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:25,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:25,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457579671] [2023-11-29 07:07:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457579671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:25,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:25,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:25,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619717269] [2023-11-29 07:07:25,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:25,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:25,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:25,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:25,310 INFO L87 Difference]: Start difference. First operand 199 states and 270 transitions. Second operand has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 07:07:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:25,921 INFO L93 Difference]: Finished difference Result 325 states and 419 transitions. [2023-11-29 07:07:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) 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 [2023-11-29 07:07:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:25,924 INFO L225 Difference]: With dead ends: 325 [2023-11-29 07:07:25,924 INFO L226 Difference]: Without dead ends: 325 [2023-11-29 07:07:25,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:25,926 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 107 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:25,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 333 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:07:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-29 07:07:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 263. [2023-11-29 07:07:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 184 states have (on average 2.010869565217391) internal successors, (370), 252 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 07:07:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 386 transitions. [2023-11-29 07:07:25,949 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 386 transitions. Word has length 6 [2023-11-29 07:07:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:25,949 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 386 transitions. [2023-11-29 07:07:25,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 07:07:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 386 transitions. [2023-11-29 07:07:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 07:07:25,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:25,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 07:07:25,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 07:07:26,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:26,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:26,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1299860297, now seen corresponding path program 1 times [2023-11-29 07:07:26,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:26,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733128127] [2023-11-29 07:07:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:26,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:26,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:26,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:26,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 07:07:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:26,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:07:26,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:26,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:26,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733128127] [2023-11-29 07:07:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733128127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:26,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:26,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118435028] [2023-11-29 07:07:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:26,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:26,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:26,300 INFO L87 Difference]: Start difference. First operand 263 states and 386 transitions. Second operand has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 07:07:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:26,876 INFO L93 Difference]: Finished difference Result 324 states and 417 transitions. [2023-11-29 07:07:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:26,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) 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 [2023-11-29 07:07:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:26,878 INFO L225 Difference]: With dead ends: 324 [2023-11-29 07:07:26,878 INFO L226 Difference]: Without dead ends: 324 [2023-11-29 07:07:26,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:26,880 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 106 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:26,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 307 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:07:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-29 07:07:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 263. [2023-11-29 07:07:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 184 states have (on average 2.010869565217391) internal successors, (370), 252 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-29 07:07:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 386 transitions. [2023-11-29 07:07:26,898 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 386 transitions. Word has length 6 [2023-11-29 07:07:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:26,898 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 386 transitions. [2023-11-29 07:07:26,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) 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) [2023-11-29 07:07:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 386 transitions. [2023-11-29 07:07:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 07:07:26,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:26,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:26,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 07:07:27,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:27,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:27,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash -669739456, now seen corresponding path program 1 times [2023-11-29 07:07:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:27,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834864188] [2023-11-29 07:07:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:27,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:27,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:27,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:27,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 07:07:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:27,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 07:07:27,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:27,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:27,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:27,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834864188] [2023-11-29 07:07:27,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834864188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:27,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:27,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768779915] [2023-11-29 07:07:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:07:27,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:07:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:27,291 INFO L87 Difference]: Start difference. First operand 263 states and 386 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 07:07:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:27,846 INFO L93 Difference]: Finished difference Result 393 states and 547 transitions. [2023-11-29 07:07:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:07:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2023-11-29 07:07:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:27,852 INFO L225 Difference]: With dead ends: 393 [2023-11-29 07:07:27,852 INFO L226 Difference]: Without dead ends: 393 [2023-11-29 07:07:27,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:27,854 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 131 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:27,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 487 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:07:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-29 07:07:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 300. [2023-11-29 07:07:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 218 states have (on average 1.981651376146789) internal successors, (432), 287 states have internal predecessors, (432), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 07:07:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 452 transitions. [2023-11-29 07:07:27,870 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 452 transitions. Word has length 8 [2023-11-29 07:07:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:27,870 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 452 transitions. [2023-11-29 07:07:27,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 07:07:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 452 transitions. [2023-11-29 07:07:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 07:07:27,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:27,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:27,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 07:07:28,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:28,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:28,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash -669679874, now seen corresponding path program 1 times [2023-11-29 07:07:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:28,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939148540] [2023-11-29 07:07:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:28,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:28,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:28,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 07:07:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:28,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 07:07:28,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:28,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:28,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:28,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939148540] [2023-11-29 07:07:28,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939148540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:28,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:28,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29457155] [2023-11-29 07:07:28,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:28,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:07:28,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:07:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:28,224 INFO L87 Difference]: Start difference. First operand 300 states and 452 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 07:07:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:28,906 INFO L93 Difference]: Finished difference Result 384 states and 537 transitions. [2023-11-29 07:07:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:07:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2023-11-29 07:07:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:28,911 INFO L225 Difference]: With dead ends: 384 [2023-11-29 07:07:28,911 INFO L226 Difference]: Without dead ends: 384 [2023-11-29 07:07:28,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:28,912 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 113 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:28,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 523 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:07:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-29 07:07:28,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 299. [2023-11-29 07:07:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 217 states have (on average 1.9861751152073732) internal successors, (431), 286 states have internal predecessors, (431), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 07:07:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 451 transitions. [2023-11-29 07:07:28,927 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 451 transitions. Word has length 8 [2023-11-29 07:07:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:28,927 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 451 transitions. [2023-11-29 07:07:28,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2023-11-29 07:07:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 451 transitions. [2023-11-29 07:07:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 07:07:28,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:28,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:28,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 07:07:29,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:29,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:29,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash 712912086, now seen corresponding path program 1 times [2023-11-29 07:07:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:29,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947681534] [2023-11-29 07:07:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:29,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:29,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:29,132 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:29,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 07:07:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:29,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:07:29,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:29,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:29,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:29,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947681534] [2023-11-29 07:07:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947681534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:29,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 07:07:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197201911] [2023-11-29 07:07:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:07:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:07:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:07:29,188 INFO L87 Difference]: Start difference. First operand 299 states and 451 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2023-11-29 07:07:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:29,469 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2023-11-29 07:07:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:07:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2023-11-29 07:07:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:29,471 INFO L225 Difference]: With dead ends: 347 [2023-11-29 07:07:29,472 INFO L226 Difference]: Without dead ends: 341 [2023-11-29 07:07:29,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:07:29,472 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 59 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:29,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 224 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:07:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-29 07:07:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 296. [2023-11-29 07:07:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 214 states have (on average 1.9906542056074767) internal successors, (426), 283 states have internal predecessors, (426), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 07:07:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 446 transitions. [2023-11-29 07:07:29,481 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 446 transitions. Word has length 9 [2023-11-29 07:07:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:29,481 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 446 transitions. [2023-11-29 07:07:29,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2023-11-29 07:07:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 446 transitions. [2023-11-29 07:07:29,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 07:07:29,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:29,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:29,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 07:07:29,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:29,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:29,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash 895737773, now seen corresponding path program 1 times [2023-11-29 07:07:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:29,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553871248] [2023-11-29 07:07:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:29,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:29,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:29,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:29,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 07:07:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:29,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 07:07:29,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:29,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:29,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553871248] [2023-11-29 07:07:29,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553871248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:29,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961849424] [2023-11-29 07:07:29,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:29,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:29,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:29,842 INFO L87 Difference]: Start difference. First operand 296 states and 446 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:30,441 INFO L93 Difference]: Finished difference Result 398 states and 535 transitions. [2023-11-29 07:07:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-29 07:07:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:30,445 INFO L225 Difference]: With dead ends: 398 [2023-11-29 07:07:30,445 INFO L226 Difference]: Without dead ends: 398 [2023-11-29 07:07:30,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:30,446 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 149 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:30,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 283 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:07:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-29 07:07:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 302. [2023-11-29 07:07:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 220 states have (on average 1.9636363636363636) internal successors, (432), 289 states have internal predecessors, (432), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 07:07:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 452 transitions. [2023-11-29 07:07:30,462 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 452 transitions. Word has length 14 [2023-11-29 07:07:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:30,463 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 452 transitions. [2023-11-29 07:07:30,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 452 transitions. [2023-11-29 07:07:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 07:07:30,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:30,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:30,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 07:07:30,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:30,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:30,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:30,665 INFO L85 PathProgramCache]: Analyzing trace with hash 895737774, now seen corresponding path program 1 times [2023-11-29 07:07:30,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:30,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217073442] [2023-11-29 07:07:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:30,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:30,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:30,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 07:07:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:30,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 07:07:30,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:30,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:30,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217073442] [2023-11-29 07:07:30,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217073442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:30,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:30,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872746211] [2023-11-29 07:07:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:30,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:30,888 INFO L87 Difference]: Start difference. First operand 302 states and 452 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:31,521 INFO L93 Difference]: Finished difference Result 344 states and 458 transitions. [2023-11-29 07:07:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:31,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-29 07:07:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:31,524 INFO L225 Difference]: With dead ends: 344 [2023-11-29 07:07:31,524 INFO L226 Difference]: Without dead ends: 344 [2023-11-29 07:07:31,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:31,524 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 92 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:31,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 355 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:07:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-29 07:07:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 302. [2023-11-29 07:07:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 220 states have (on average 1.9227272727272726) internal successors, (423), 289 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 07:07:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 443 transitions. [2023-11-29 07:07:31,534 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 443 transitions. Word has length 14 [2023-11-29 07:07:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:31,535 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 443 transitions. [2023-11-29 07:07:31,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 443 transitions. [2023-11-29 07:07:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 07:07:31,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:31,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:31,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:31,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:31,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:31,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1806038072, now seen corresponding path program 1 times [2023-11-29 07:07:31,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:31,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146210384] [2023-11-29 07:07:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:31,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:31,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:31,739 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:31,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 07:07:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:31,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:07:31,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:31,910 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 07:07:31,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 07:07:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:32,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:32,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:32,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146210384] [2023-11-29 07:07:32,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146210384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:32,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:32,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791993604] [2023-11-29 07:07:32,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:32,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:32,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:32,005 INFO L87 Difference]: Start difference. First operand 302 states and 443 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:32,926 INFO L93 Difference]: Finished difference Result 432 states and 565 transitions. [2023-11-29 07:07:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 07:07:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:32,929 INFO L225 Difference]: With dead ends: 432 [2023-11-29 07:07:32,929 INFO L226 Difference]: Without dead ends: 432 [2023-11-29 07:07:32,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:32,930 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 220 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:32,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 281 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 07:07:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-11-29 07:07:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 319. [2023-11-29 07:07:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 237 states have (on average 1.9493670886075949) internal successors, (462), 306 states have internal predecessors, (462), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 07:07:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 482 transitions. [2023-11-29 07:07:32,943 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 482 transitions. Word has length 16 [2023-11-29 07:07:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:32,943 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 482 transitions. [2023-11-29 07:07:32,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 482 transitions. [2023-11-29 07:07:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 07:07:32,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:32,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:32,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 07:07:33,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:33,149 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:33,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1806038073, now seen corresponding path program 1 times [2023-11-29 07:07:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150450375] [2023-11-29 07:07:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:33,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:33,151 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:33,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 07:07:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:33,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:07:33,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:33,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:07:33,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 07:07:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:33,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:33,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:33,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150450375] [2023-11-29 07:07:33,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150450375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:33,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:33,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:33,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042724961] [2023-11-29 07:07:33,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:33,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:33,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:33,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:33,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:33,541 INFO L87 Difference]: Start difference. First operand 319 states and 482 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:34,950 INFO L93 Difference]: Finished difference Result 508 states and 674 transitions. [2023-11-29 07:07:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:07:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 07:07:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:34,953 INFO L225 Difference]: With dead ends: 508 [2023-11-29 07:07:34,954 INFO L226 Difference]: Without dead ends: 508 [2023-11-29 07:07:34,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:34,954 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 342 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:34,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 358 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 07:07:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-29 07:07:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 346. [2023-11-29 07:07:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 262 states have (on average 1.9312977099236641) internal successors, (506), 332 states have internal predecessors, (506), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-29 07:07:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 530 transitions. [2023-11-29 07:07:34,967 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 530 transitions. Word has length 16 [2023-11-29 07:07:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:34,967 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 530 transitions. [2023-11-29 07:07:34,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 530 transitions. [2023-11-29 07:07:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 07:07:34,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:34,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:34,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 07:07:35,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:35,170 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:35,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1416390, now seen corresponding path program 1 times [2023-11-29 07:07:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:35,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572645824] [2023-11-29 07:07:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:35,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:35,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 07:07:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:35,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:07:35,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:35,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:35,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572645824] [2023-11-29 07:07:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572645824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:35,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:35,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:07:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287067457] [2023-11-29 07:07:35,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:35,248 INFO L87 Difference]: Start difference. First operand 346 states and 530 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:35,548 INFO L93 Difference]: Finished difference Result 440 states and 671 transitions. [2023-11-29 07:07:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:07:35,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 07:07:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:35,551 INFO L225 Difference]: With dead ends: 440 [2023-11-29 07:07:35,552 INFO L226 Difference]: Without dead ends: 440 [2023-11-29 07:07:35,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:07:35,552 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 115 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:35,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 920 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:07:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-29 07:07:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 356. [2023-11-29 07:07:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 269 states have (on average 1.903345724907063) internal successors, (512), 341 states have internal predecessors, (512), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 07:07:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 542 transitions. [2023-11-29 07:07:35,564 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 542 transitions. Word has length 16 [2023-11-29 07:07:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:35,564 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 542 transitions. [2023-11-29 07:07:35,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 542 transitions. [2023-11-29 07:07:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 07:07:35,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:35,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:35,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 07:07:35,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:35,766 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:35,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash -43852513, now seen corresponding path program 1 times [2023-11-29 07:07:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:35,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214651531] [2023-11-29 07:07:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:35,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:35,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:35,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 07:07:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:35,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:07:35,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:07:36,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 07:07:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:36,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:36,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:36,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214651531] [2023-11-29 07:07:36,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214651531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:36,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:36,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:36,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372613391] [2023-11-29 07:07:36,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:36,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:36,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:36,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:36,079 INFO L87 Difference]: Start difference. First operand 356 states and 542 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:37,490 INFO L93 Difference]: Finished difference Result 518 states and 681 transitions. [2023-11-29 07:07:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:07:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-29 07:07:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:37,493 INFO L225 Difference]: With dead ends: 518 [2023-11-29 07:07:37,494 INFO L226 Difference]: Without dead ends: 518 [2023-11-29 07:07:37,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:37,494 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 276 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:37,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 412 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 07:07:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-11-29 07:07:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 337. [2023-11-29 07:07:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 250 states have (on average 1.88) internal successors, (470), 322 states have internal predecessors, (470), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 07:07:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 500 transitions. [2023-11-29 07:07:37,507 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 500 transitions. Word has length 17 [2023-11-29 07:07:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:37,507 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 500 transitions. [2023-11-29 07:07:37,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 500 transitions. [2023-11-29 07:07:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 07:07:37,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:37,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:37,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 07:07:37,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:37,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:37,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash 608544403, now seen corresponding path program 1 times [2023-11-29 07:07:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:37,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776913134] [2023-11-29 07:07:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:37,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:37,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:37,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:37,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 07:07:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:37,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 07:07:37,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:38,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:38,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:38,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776913134] [2023-11-29 07:07:38,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776913134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:38,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:38,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:07:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017224574] [2023-11-29 07:07:38,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:38,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:38,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:38,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:38,120 INFO L87 Difference]: Start difference. First operand 337 states and 500 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:38,846 INFO L93 Difference]: Finished difference Result 422 states and 594 transitions. [2023-11-29 07:07:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:07:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-29 07:07:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:38,848 INFO L225 Difference]: With dead ends: 422 [2023-11-29 07:07:38,848 INFO L226 Difference]: Without dead ends: 422 [2023-11-29 07:07:38,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:07:38,849 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 96 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:38,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 548 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:07:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-11-29 07:07:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 331. [2023-11-29 07:07:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 244 states have (on average 1.8811475409836065) internal successors, (459), 316 states have internal predecessors, (459), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 07:07:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 489 transitions. [2023-11-29 07:07:38,857 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 489 transitions. Word has length 18 [2023-11-29 07:07:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:38,857 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 489 transitions. [2023-11-29 07:07:38,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 489 transitions. [2023-11-29 07:07:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 07:07:38,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:38,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:38,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 07:07:39,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:39,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:39,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1685373121, now seen corresponding path program 1 times [2023-11-29 07:07:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:39,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644111727] [2023-11-29 07:07:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:39,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:39,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:39,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:39,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 07:07:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:39,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 07:07:39,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:39,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:39,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:39,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644111727] [2023-11-29 07:07:39,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644111727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:39,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:39,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:07:39,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820552801] [2023-11-29 07:07:39,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:39,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:39,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:39,225 INFO L87 Difference]: Start difference. First operand 331 states and 489 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:39,804 INFO L93 Difference]: Finished difference Result 294 states and 401 transitions. [2023-11-29 07:07:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:07:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-29 07:07:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:39,807 INFO L225 Difference]: With dead ends: 294 [2023-11-29 07:07:39,807 INFO L226 Difference]: Without dead ends: 294 [2023-11-29 07:07:39,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:07:39,808 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 47 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:39,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 677 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:07:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-29 07:07:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 252. [2023-11-29 07:07:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 173 states have (on average 1.9017341040462428) internal successors, (329), 241 states have internal predecessors, (329), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 347 transitions. [2023-11-29 07:07:39,814 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 347 transitions. Word has length 19 [2023-11-29 07:07:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:39,814 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 347 transitions. [2023-11-29 07:07:39,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 347 transitions. [2023-11-29 07:07:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 07:07:39,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:39,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:39,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 07:07:40,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:40,016 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:40,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash 632303953, now seen corresponding path program 1 times [2023-11-29 07:07:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:40,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876359635] [2023-11-29 07:07:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:40,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:40,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:40,018 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:40,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 07:07:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:40,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:07:40,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:40,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:40,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876359635] [2023-11-29 07:07:40,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876359635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:40,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:40,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:07:40,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510553372] [2023-11-29 07:07:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:40,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:07:40,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:40,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:07:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:40,292 INFO L87 Difference]: Start difference. First operand 252 states and 347 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:40,822 INFO L93 Difference]: Finished difference Result 346 states and 471 transitions. [2023-11-29 07:07:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:07:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-29 07:07:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:40,823 INFO L225 Difference]: With dead ends: 346 [2023-11-29 07:07:40,823 INFO L226 Difference]: Without dead ends: 346 [2023-11-29 07:07:40,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:07:40,824 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 150 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:40,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 629 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:07:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-29 07:07:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 260. [2023-11-29 07:07:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 181 states have (on average 1.87292817679558) internal successors, (339), 248 states have internal predecessors, (339), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 357 transitions. [2023-11-29 07:07:40,830 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 357 transitions. Word has length 19 [2023-11-29 07:07:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:40,830 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 357 transitions. [2023-11-29 07:07:40,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 357 transitions. [2023-11-29 07:07:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 07:07:40,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:40,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:40,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 07:07:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:41,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:41,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -732768597, now seen corresponding path program 1 times [2023-11-29 07:07:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358133338] [2023-11-29 07:07:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:41,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:41,033 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:41,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 07:07:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:41,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:07:41,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:41,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:41,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358133338] [2023-11-29 07:07:41,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358133338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:41,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:41,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:07:41,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136134921] [2023-11-29 07:07:41,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:41,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:07:41,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:41,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:07:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:41,286 INFO L87 Difference]: Start difference. First operand 260 states and 357 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:41,827 INFO L93 Difference]: Finished difference Result 341 states and 461 transitions. [2023-11-29 07:07:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:07:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-29 07:07:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:41,829 INFO L225 Difference]: With dead ends: 341 [2023-11-29 07:07:41,829 INFO L226 Difference]: Without dead ends: 341 [2023-11-29 07:07:41,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:07:41,830 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 117 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:41,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 696 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:07:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-29 07:07:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 264. [2023-11-29 07:07:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 185 states have (on average 1.854054054054054) internal successors, (343), 251 states have internal predecessors, (343), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 361 transitions. [2023-11-29 07:07:41,835 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 361 transitions. Word has length 20 [2023-11-29 07:07:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:41,835 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 361 transitions. [2023-11-29 07:07:41,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 361 transitions. [2023-11-29 07:07:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 07:07:41,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:41,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:41,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 07:07:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:42,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:42,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash -492244314, now seen corresponding path program 1 times [2023-11-29 07:07:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:42,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641644590] [2023-11-29 07:07:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:42,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:42,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:42,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:42,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 07:07:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:42,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 07:07:42,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:42,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:42,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641644590] [2023-11-29 07:07:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641644590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775103741] [2023-11-29 07:07:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:42,104 INFO L87 Difference]: Start difference. First operand 264 states and 361 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:42,234 INFO L93 Difference]: Finished difference Result 276 states and 373 transitions. [2023-11-29 07:07:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:07:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-29 07:07:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:42,236 INFO L225 Difference]: With dead ends: 276 [2023-11-29 07:07:42,236 INFO L226 Difference]: Without dead ends: 276 [2023-11-29 07:07:42,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:42,237 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 3 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:42,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 432 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:07:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-11-29 07:07:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2023-11-29 07:07:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 194 states have (on average 1.8144329896907216) internal successors, (352), 260 states have internal predecessors, (352), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 370 transitions. [2023-11-29 07:07:42,244 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 370 transitions. Word has length 22 [2023-11-29 07:07:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:42,244 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 370 transitions. [2023-11-29 07:07:42,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 370 transitions. [2023-11-29 07:07:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 07:07:42,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:42,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:42,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 07:07:42,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:42,446 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:42,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:42,446 INFO L85 PathProgramCache]: Analyzing trace with hash -492184732, now seen corresponding path program 1 times [2023-11-29 07:07:42,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:42,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648061187] [2023-11-29 07:07:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:42,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:42,447 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:42,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 07:07:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:42,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:07:42,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:42,507 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 [2023-11-29 07:07:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:42,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:42,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:42,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648061187] [2023-11-29 07:07:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648061187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:42,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:42,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:07:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723574473] [2023-11-29 07:07:42,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:42,588 INFO L87 Difference]: Start difference. First operand 273 states and 370 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:43,090 INFO L93 Difference]: Finished difference Result 357 states and 497 transitions. [2023-11-29 07:07:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-29 07:07:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:43,093 INFO L225 Difference]: With dead ends: 357 [2023-11-29 07:07:43,093 INFO L226 Difference]: Without dead ends: 357 [2023-11-29 07:07:43,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:43,094 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 81 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:43,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 311 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:07:43,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-29 07:07:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 316. [2023-11-29 07:07:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 238 states have (on average 1.7941176470588236) internal successors, (427), 303 states have internal predecessors, (427), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 445 transitions. [2023-11-29 07:07:43,100 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 445 transitions. Word has length 22 [2023-11-29 07:07:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:43,100 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 445 transitions. [2023-11-29 07:07:43,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 445 transitions. [2023-11-29 07:07:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 07:07:43,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:43,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:43,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 07:07:43,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:43,302 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:43,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash -492184733, now seen corresponding path program 1 times [2023-11-29 07:07:43,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624199281] [2023-11-29 07:07:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:43,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:43,303 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:43,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 07:07:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:43,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 07:07:43,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:43,356 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 7 [2023-11-29 07:07:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:43,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:43,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:43,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624199281] [2023-11-29 07:07:43,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624199281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:43,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:43,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:43,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948605464] [2023-11-29 07:07:43,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:43,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:07:43,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:43,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:07:43,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:07:43,388 INFO L87 Difference]: Start difference. First operand 316 states and 445 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:43,562 INFO L93 Difference]: Finished difference Result 313 states and 433 transitions. [2023-11-29 07:07:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:07:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-29 07:07:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:43,564 INFO L225 Difference]: With dead ends: 313 [2023-11-29 07:07:43,564 INFO L226 Difference]: Without dead ends: 313 [2023-11-29 07:07:43,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:07:43,565 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 36 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:43,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 200 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 07:07:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-29 07:07:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2023-11-29 07:07:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 238 states have (on average 1.7436974789915967) internal successors, (415), 300 states have internal predecessors, (415), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 433 transitions. [2023-11-29 07:07:43,573 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 433 transitions. Word has length 22 [2023-11-29 07:07:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:43,573 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 433 transitions. [2023-11-29 07:07:43,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 433 transitions. [2023-11-29 07:07:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 07:07:43,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:43,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:43,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-29 07:07:43,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:43,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:43,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:43,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2107629077, now seen corresponding path program 1 times [2023-11-29 07:07:43,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:43,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103709622] [2023-11-29 07:07:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:43,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:43,777 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:43,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 07:07:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:43,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:07:43,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:43,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:43,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103709622] [2023-11-29 07:07:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103709622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:43,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:43,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:07:43,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141048927] [2023-11-29 07:07:43,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:43,857 INFO L87 Difference]: Start difference. First operand 313 states and 433 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:44,088 INFO L93 Difference]: Finished difference Result 376 states and 513 transitions. [2023-11-29 07:07:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:07:44,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-29 07:07:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:44,090 INFO L225 Difference]: With dead ends: 376 [2023-11-29 07:07:44,090 INFO L226 Difference]: Without dead ends: 376 [2023-11-29 07:07:44,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:07:44,091 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 102 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:44,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 703 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 07:07:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-29 07:07:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 313. [2023-11-29 07:07:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 238 states have (on average 1.73109243697479) internal successors, (412), 300 states have internal predecessors, (412), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 430 transitions. [2023-11-29 07:07:44,100 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 430 transitions. Word has length 23 [2023-11-29 07:07:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:44,100 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 430 transitions. [2023-11-29 07:07:44,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 430 transitions. [2023-11-29 07:07:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 07:07:44,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:44,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:44,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 07:07:44,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:44,302 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:44,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:44,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1676804042, now seen corresponding path program 1 times [2023-11-29 07:07:44,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:44,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425873954] [2023-11-29 07:07:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:44,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:44,304 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:44,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 07:07:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:44,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:07:44,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:44,363 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 [2023-11-29 07:07:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:44,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:44,440 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425873954] [2023-11-29 07:07:44,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425873954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:44,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:07:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240875724] [2023-11-29 07:07:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:44,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:44,442 INFO L87 Difference]: Start difference. First operand 313 states and 430 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:44,969 INFO L93 Difference]: Finished difference Result 395 states and 551 transitions. [2023-11-29 07:07:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-29 07:07:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:44,972 INFO L225 Difference]: With dead ends: 395 [2023-11-29 07:07:44,972 INFO L226 Difference]: Without dead ends: 395 [2023-11-29 07:07:44,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:44,973 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 74 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:44,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 331 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:07:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-29 07:07:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 313. [2023-11-29 07:07:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 238 states have (on average 1.73109243697479) internal successors, (412), 300 states have internal predecessors, (412), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 430 transitions. [2023-11-29 07:07:44,982 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 430 transitions. Word has length 23 [2023-11-29 07:07:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:44,982 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 430 transitions. [2023-11-29 07:07:44,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 430 transitions. [2023-11-29 07:07:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 07:07:44,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:44,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:44,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 07:07:45,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:45,183 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:45,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1938104884, now seen corresponding path program 1 times [2023-11-29 07:07:45,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:45,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856040298] [2023-11-29 07:07:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:45,185 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:45,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 07:07:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:45,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:07:45,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:45,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:45,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:45,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856040298] [2023-11-29 07:07:45,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856040298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:45,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:45,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 07:07:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091918730] [2023-11-29 07:07:45,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:45,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:45,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:45,270 INFO L87 Difference]: Start difference. First operand 313 states and 430 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:45,542 INFO L93 Difference]: Finished difference Result 372 states and 504 transitions. [2023-11-29 07:07:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:07:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-29 07:07:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:45,544 INFO L225 Difference]: With dead ends: 372 [2023-11-29 07:07:45,545 INFO L226 Difference]: Without dead ends: 372 [2023-11-29 07:07:45,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:07:45,545 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 103 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:45,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 874 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:07:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-29 07:07:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 268. [2023-11-29 07:07:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 194 states have (on average 1.7061855670103092) internal successors, (331), 255 states have internal predecessors, (331), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 349 transitions. [2023-11-29 07:07:45,551 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 349 transitions. Word has length 23 [2023-11-29 07:07:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:45,552 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 349 transitions. [2023-11-29 07:07:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 349 transitions. [2023-11-29 07:07:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 07:07:45,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:45,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:45,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-29 07:07:45,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:45,753 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:45,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash -543123644, now seen corresponding path program 1 times [2023-11-29 07:07:45,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:45,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95330117] [2023-11-29 07:07:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:45,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:45,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:45,754 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:45,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-29 07:07:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:45,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 07:07:45,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:45,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:45,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:45,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95330117] [2023-11-29 07:07:45,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95330117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:45,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:45,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:07:45,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695480828] [2023-11-29 07:07:45,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:45,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:07:45,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:45,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:07:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:45,899 INFO L87 Difference]: Start difference. First operand 268 states and 349 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:46,388 INFO L93 Difference]: Finished difference Result 301 states and 390 transitions. [2023-11-29 07:07:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:07:46,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-29 07:07:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:46,391 INFO L225 Difference]: With dead ends: 301 [2023-11-29 07:07:46,391 INFO L226 Difference]: Without dead ends: 301 [2023-11-29 07:07:46,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:46,392 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 23 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:46,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 482 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:07:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-11-29 07:07:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 289. [2023-11-29 07:07:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 215 states have (on average 1.669767441860465) internal successors, (359), 276 states have internal predecessors, (359), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 377 transitions. [2023-11-29 07:07:46,397 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 377 transitions. Word has length 24 [2023-11-29 07:07:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:46,397 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 377 transitions. [2023-11-29 07:07:46,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 377 transitions. [2023-11-29 07:07:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 07:07:46,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:46,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:46,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:46,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:46,599 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:46,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -543123450, now seen corresponding path program 1 times [2023-11-29 07:07:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762616944] [2023-11-29 07:07:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:46,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:46,600 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:46,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-29 07:07:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:46,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:07:46,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:46,683 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 [2023-11-29 07:07:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:46,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:46,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762616944] [2023-11-29 07:07:46,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762616944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:46,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:46,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:07:46,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041682561] [2023-11-29 07:07:46,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:46,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:46,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:46,776 INFO L87 Difference]: Start difference. First operand 289 states and 377 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:47,132 INFO L93 Difference]: Finished difference Result 391 states and 520 transitions. [2023-11-29 07:07:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-29 07:07:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:47,135 INFO L225 Difference]: With dead ends: 391 [2023-11-29 07:07:47,135 INFO L226 Difference]: Without dead ends: 391 [2023-11-29 07:07:47,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:47,136 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 99 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:47,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 230 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:07:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-29 07:07:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 357. [2023-11-29 07:07:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 283 states have (on average 1.6643109540636043) internal successors, (471), 344 states have internal predecessors, (471), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 489 transitions. [2023-11-29 07:07:47,146 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 489 transitions. Word has length 24 [2023-11-29 07:07:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:47,147 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 489 transitions. [2023-11-29 07:07:47,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 489 transitions. [2023-11-29 07:07:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 07:07:47,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:47,148 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 07:07:47,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-11-29 07:07:47,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:47,351 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:47,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 795949804, now seen corresponding path program 1 times [2023-11-29 07:07:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:47,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891806007] [2023-11-29 07:07:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:47,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:47,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:47,352 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:47,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-29 07:07:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:47,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:07:47,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:47,412 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 [2023-11-29 07:07:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:47,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:47,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891806007] [2023-11-29 07:07:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891806007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:47,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:07:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007694892] [2023-11-29 07:07:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:47,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:47,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:47,508 INFO L87 Difference]: Start difference. First operand 357 states and 489 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:47,919 INFO L93 Difference]: Finished difference Result 390 states and 514 transitions. [2023-11-29 07:07:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-29 07:07:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:47,922 INFO L225 Difference]: With dead ends: 390 [2023-11-29 07:07:47,922 INFO L226 Difference]: Without dead ends: 390 [2023-11-29 07:07:47,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:47,922 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 68 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:47,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 250 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:07:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-29 07:07:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 288. [2023-11-29 07:07:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.6418604651162791) internal successors, (353), 275 states have internal predecessors, (353), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 371 transitions. [2023-11-29 07:07:47,929 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 371 transitions. Word has length 25 [2023-11-29 07:07:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:47,929 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 371 transitions. [2023-11-29 07:07:47,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 371 transitions. [2023-11-29 07:07:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 07:07:47,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:47,930 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 07:07:47,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-11-29 07:07:48,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:48,130 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:48,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2036155710, now seen corresponding path program 1 times [2023-11-29 07:07:48,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:48,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669200977] [2023-11-29 07:07:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:48,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:48,132 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:48,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-29 07:07:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:48,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:07:48,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:48,224 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 7 [2023-11-29 07:07:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:48,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:48,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:48,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669200977] [2023-11-29 07:07:48,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669200977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:48,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:48,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:48,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817749813] [2023-11-29 07:07:48,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:48,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:07:48,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:07:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:48,268 INFO L87 Difference]: Start difference. First operand 288 states and 371 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:48,639 INFO L93 Difference]: Finished difference Result 287 states and 369 transitions. [2023-11-29 07:07:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:07:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-29 07:07:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:48,641 INFO L225 Difference]: With dead ends: 287 [2023-11-29 07:07:48,641 INFO L226 Difference]: Without dead ends: 287 [2023-11-29 07:07:48,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:48,642 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 51 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:48,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 361 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:07:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-29 07:07:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-11-29 07:07:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 215 states have (on average 1.6325581395348838) internal successors, (351), 274 states have internal predecessors, (351), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 369 transitions. [2023-11-29 07:07:48,649 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 369 transitions. Word has length 28 [2023-11-29 07:07:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:48,649 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 369 transitions. [2023-11-29 07:07:48,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 369 transitions. [2023-11-29 07:07:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 07:07:48,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:48,650 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 07:07:48,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:48,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:48,850 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:48,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:48,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2036155711, now seen corresponding path program 1 times [2023-11-29 07:07:48,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:48,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740895097] [2023-11-29 07:07:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:48,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:48,852 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:48,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-29 07:07:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:48,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:07:48,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:48,951 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 [2023-11-29 07:07:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:49,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:49,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:49,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740895097] [2023-11-29 07:07:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740895097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:49,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:49,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691275755] [2023-11-29 07:07:49,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:49,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:07:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:07:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:49,047 INFO L87 Difference]: Start difference. First operand 287 states and 369 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:49,467 INFO L93 Difference]: Finished difference Result 286 states and 367 transitions. [2023-11-29 07:07:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:07:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-29 07:07:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:49,469 INFO L225 Difference]: With dead ends: 286 [2023-11-29 07:07:49,469 INFO L226 Difference]: Without dead ends: 286 [2023-11-29 07:07:49,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:49,470 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 50 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:49,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 391 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:07:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-29 07:07:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2023-11-29 07:07:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 215 states have (on average 1.6232558139534883) internal successors, (349), 273 states have internal predecessors, (349), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2023-11-29 07:07:49,475 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 28 [2023-11-29 07:07:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:49,476 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2023-11-29 07:07:49,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2023-11-29 07:07:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 07:07:49,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:49,476 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 07:07:49,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:49,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:49,677 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:49,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1759446305, now seen corresponding path program 1 times [2023-11-29 07:07:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:49,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312693279] [2023-11-29 07:07:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:49,679 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:49,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-29 07:07:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:49,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:07:49,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:49,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:49,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312693279] [2023-11-29 07:07:49,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312693279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:49,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:49,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:07:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691524704] [2023-11-29 07:07:49,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:49,799 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:50,113 INFO L93 Difference]: Finished difference Result 322 states and 406 transitions. [2023-11-29 07:07:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:07:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-29 07:07:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:50,115 INFO L225 Difference]: With dead ends: 322 [2023-11-29 07:07:50,115 INFO L226 Difference]: Without dead ends: 322 [2023-11-29 07:07:50,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:50,115 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 86 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:50,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 291 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:07:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-29 07:07:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 310. [2023-11-29 07:07:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 242 states have (on average 1.603305785123967) internal successors, (388), 297 states have internal predecessors, (388), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 406 transitions. [2023-11-29 07:07:50,123 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 406 transitions. Word has length 30 [2023-11-29 07:07:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:50,123 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 406 transitions. [2023-11-29 07:07:50,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 406 transitions. [2023-11-29 07:07:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 07:07:50,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:50,124 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 07:07:50,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:50,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:50,324 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:50,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1759446304, now seen corresponding path program 1 times [2023-11-29 07:07:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:50,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946293975] [2023-11-29 07:07:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:50,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:50,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:50,326 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:50,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-29 07:07:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:50,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 07:07:50,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:50,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:50,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:50,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946293975] [2023-11-29 07:07:50,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946293975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:50,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:50,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:07:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278563522] [2023-11-29 07:07:50,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:50,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:07:50,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:07:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:50,587 INFO L87 Difference]: Start difference. First operand 310 states and 406 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:51,328 INFO L93 Difference]: Finished difference Result 463 states and 611 transitions. [2023-11-29 07:07:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 07:07:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-29 07:07:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:51,331 INFO L225 Difference]: With dead ends: 463 [2023-11-29 07:07:51,331 INFO L226 Difference]: Without dead ends: 463 [2023-11-29 07:07:51,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:07:51,332 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 318 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:51,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 582 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 07:07:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-29 07:07:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 429. [2023-11-29 07:07:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 361 states have (on average 1.6038781163434903) internal successors, (579), 416 states have internal predecessors, (579), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 597 transitions. [2023-11-29 07:07:51,340 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 597 transitions. Word has length 30 [2023-11-29 07:07:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:51,340 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 597 transitions. [2023-11-29 07:07:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 597 transitions. [2023-11-29 07:07:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 07:07:51,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:51,341 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 07:07:51,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-11-29 07:07:51,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:51,541 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:51,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:51,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1759446143, now seen corresponding path program 1 times [2023-11-29 07:07:51,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:51,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140169719] [2023-11-29 07:07:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:51,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:51,543 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:51,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-11-29 07:07:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:51,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 07:07:51,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:07:51,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 07:07:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:51,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:51,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140169719] [2023-11-29 07:07:51,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140169719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:51,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:51,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:07:51,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372052109] [2023-11-29 07:07:51,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:51,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:07:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:07:51,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:07:51,906 INFO L87 Difference]: Start difference. First operand 429 states and 597 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:52,596 INFO L93 Difference]: Finished difference Result 497 states and 642 transitions. [2023-11-29 07:07:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:07:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-29 07:07:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:52,599 INFO L225 Difference]: With dead ends: 497 [2023-11-29 07:07:52,599 INFO L226 Difference]: Without dead ends: 497 [2023-11-29 07:07:52,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:07:52,600 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 160 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:52,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 227 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 07:07:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-11-29 07:07:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 368. [2023-11-29 07:07:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 300 states have (on average 1.6) internal successors, (480), 355 states have internal predecessors, (480), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 498 transitions. [2023-11-29 07:07:52,606 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 498 transitions. Word has length 30 [2023-11-29 07:07:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:52,606 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 498 transitions. [2023-11-29 07:07:52,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 498 transitions. [2023-11-29 07:07:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 07:07:52,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:52,607 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-29 07:07:52,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-11-29 07:07:52,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:52,807 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:52,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:52,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1267354781, now seen corresponding path program 1 times [2023-11-29 07:07:52,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:52,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068248386] [2023-11-29 07:07:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:52,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:52,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:52,809 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:52,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-11-29 07:07:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:52,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:07:52,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:53,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:53,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068248386] [2023-11-29 07:07:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068248386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:53,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:53,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357706062] [2023-11-29 07:07:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:53,127 INFO L87 Difference]: Start difference. First operand 368 states and 498 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:53,570 INFO L93 Difference]: Finished difference Result 381 states and 511 transitions. [2023-11-29 07:07:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:07:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-11-29 07:07:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:53,572 INFO L225 Difference]: With dead ends: 381 [2023-11-29 07:07:53,573 INFO L226 Difference]: Without dead ends: 381 [2023-11-29 07:07:53,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:53,573 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 202 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:53,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 253 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:07:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-29 07:07:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 337. [2023-11-29 07:07:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 272 states have (on average 1.5661764705882353) internal successors, (426), 324 states have internal predecessors, (426), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 444 transitions. [2023-11-29 07:07:53,579 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 444 transitions. Word has length 41 [2023-11-29 07:07:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:53,580 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 444 transitions. [2023-11-29 07:07:53,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 444 transitions. [2023-11-29 07:07:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 07:07:53,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:53,580 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-29 07:07:53,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2023-11-29 07:07:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:53,781 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:53,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1267354843, now seen corresponding path program 1 times [2023-11-29 07:07:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:53,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507084003] [2023-11-29 07:07:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:53,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:53,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:53,782 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:53,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-11-29 07:07:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:53,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:07:53,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:54,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:54,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:54,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507084003] [2023-11-29 07:07:54,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507084003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:54,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:54,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:07:54,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114639814] [2023-11-29 07:07:54,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:54,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:07:54,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:07:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:07:54,060 INFO L87 Difference]: Start difference. First operand 337 states and 444 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:54,517 INFO L93 Difference]: Finished difference Result 350 states and 455 transitions. [2023-11-29 07:07:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:07:54,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-11-29 07:07:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:54,520 INFO L225 Difference]: With dead ends: 350 [2023-11-29 07:07:54,520 INFO L226 Difference]: Without dead ends: 350 [2023-11-29 07:07:54,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:07:54,521 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 296 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:54,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 275 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:07:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-29 07:07:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 334. [2023-11-29 07:07:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 270 states have (on average 1.5592592592592593) internal successors, (421), 321 states have internal predecessors, (421), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 439 transitions. [2023-11-29 07:07:54,527 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 439 transitions. Word has length 41 [2023-11-29 07:07:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:54,527 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 439 transitions. [2023-11-29 07:07:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 439 transitions. [2023-11-29 07:07:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 07:07:54,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:54,528 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-29 07:07:54,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-11-29 07:07:54,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:54,728 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:54,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash -409373237, now seen corresponding path program 1 times [2023-11-29 07:07:54,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:54,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910137773] [2023-11-29 07:07:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:54,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:54,730 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:54,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-11-29 07:07:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:54,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 07:07:54,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:55,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:07:55,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:07:55,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-11-29 07:07:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:07:55,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:55,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910137773] [2023-11-29 07:07:55,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910137773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:07:55,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:07:55,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2023-11-29 07:07:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710122399] [2023-11-29 07:07:55,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:07:55,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 07:07:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 07:07:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 07:07:55,760 INFO L87 Difference]: Start difference. First operand 334 states and 439 transitions. Second operand has 14 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:07:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:56,942 INFO L93 Difference]: Finished difference Result 466 states and 594 transitions. [2023-11-29 07:07:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:07:56,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2023-11-29 07:07:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:56,945 INFO L225 Difference]: With dead ends: 466 [2023-11-29 07:07:56,945 INFO L226 Difference]: Without dead ends: 466 [2023-11-29 07:07:56,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2023-11-29 07:07:56,946 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 990 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:56,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 436 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 07:07:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-29 07:07:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 332. [2023-11-29 07:07:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 270 states have (on average 1.5407407407407407) internal successors, (416), 319 states have internal predecessors, (416), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-29 07:07:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 434 transitions. [2023-11-29 07:07:56,956 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 434 transitions. Word has length 43 [2023-11-29 07:07:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:56,956 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 434 transitions. [2023-11-29 07:07:56,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.923076923076923) internal successors, (77), 12 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:07:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 434 transitions. [2023-11-29 07:07:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 07:07:56,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:56,957 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:56,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-11-29 07:07:57,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:57,157 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:57,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:57,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1842709678, now seen corresponding path program 1 times [2023-11-29 07:07:57,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:57,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172860306] [2023-11-29 07:07:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:57,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:57,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:57,159 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:57,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-11-29 07:07:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:57,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 07:07:57,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:57,284 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 7 [2023-11-29 07:07:57,445 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 15 treesize of output 1 [2023-11-29 07:07:57,506 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 19 treesize of output 11 [2023-11-29 07:07:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:57,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:57,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:57,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172860306] [2023-11-29 07:07:57,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172860306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:57,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:57,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 07:07:57,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887115923] [2023-11-29 07:07:57,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:57,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:07:57,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:07:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:07:57,525 INFO L87 Difference]: Start difference. First operand 332 states and 434 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:07:58,982 INFO L93 Difference]: Finished difference Result 751 states and 980 transitions. [2023-11-29 07:07:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 07:07:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-29 07:07:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:07:58,986 INFO L225 Difference]: With dead ends: 751 [2023-11-29 07:07:58,986 INFO L226 Difference]: Without dead ends: 751 [2023-11-29 07:07:58,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-29 07:07:58,987 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 297 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:07:58,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 869 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 07:07:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-29 07:07:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 421. [2023-11-29 07:07:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 352 states have (on average 1.5142045454545454) internal successors, (533), 404 states have internal predecessors, (533), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-29 07:07:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 563 transitions. [2023-11-29 07:07:58,995 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 563 transitions. Word has length 43 [2023-11-29 07:07:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:07:58,995 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 563 transitions. [2023-11-29 07:07:58,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:07:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 563 transitions. [2023-11-29 07:07:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 07:07:58,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:07:58,996 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:58,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2023-11-29 07:07:59,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:59,196 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:07:59,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1842709677, now seen corresponding path program 1 times [2023-11-29 07:07:59,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:07:59,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216438242] [2023-11-29 07:07:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:59,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:07:59,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:07:59,198 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:07:59,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-11-29 07:07:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:59,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 07:07:59,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:59,345 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 [2023-11-29 07:07:59,560 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 [2023-11-29 07:07:59,568 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 15 treesize of output 1 [2023-11-29 07:07:59,671 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 17 treesize of output 9 [2023-11-29 07:07:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:59,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:07:59,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:07:59,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216438242] [2023-11-29 07:07:59,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216438242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:07:59,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:07:59,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 07:07:59,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896083879] [2023-11-29 07:07:59,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:07:59,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:07:59,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:07:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:07:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:07:59,706 INFO L87 Difference]: Start difference. First operand 421 states and 563 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:01,279 INFO L93 Difference]: Finished difference Result 793 states and 1037 transitions. [2023-11-29 07:08:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:08:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-29 07:08:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:01,282 INFO L225 Difference]: With dead ends: 793 [2023-11-29 07:08:01,282 INFO L226 Difference]: Without dead ends: 793 [2023-11-29 07:08:01,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-29 07:08:01,283 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 308 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:01,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 923 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 07:08:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-11-29 07:08:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 464. [2023-11-29 07:08:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 391 states have (on average 1.5345268542199488) internal successors, (600), 445 states have internal predecessors, (600), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 07:08:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 636 transitions. [2023-11-29 07:08:01,292 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 636 transitions. Word has length 43 [2023-11-29 07:08:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:01,292 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 636 transitions. [2023-11-29 07:08:01,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 636 transitions. [2023-11-29 07:08:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 07:08:01,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:01,293 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:01,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2023-11-29 07:08:01,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:01,493 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:01,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1842650096, now seen corresponding path program 1 times [2023-11-29 07:08:01,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:01,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328402369] [2023-11-29 07:08:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:01,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:01,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:01,495 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:01,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-11-29 07:08:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:01,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 07:08:01,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:01,731 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 07:08:01,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 07:08:01,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 07:08:01,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 07:08:01,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:08:01,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:08:02,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:02,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:02,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:02,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:02,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328402369] [2023-11-29 07:08:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328402369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:02,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:02,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 07:08:02,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623104829] [2023-11-29 07:08:02,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:02,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 07:08:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 07:08:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-29 07:08:02,070 INFO L87 Difference]: Start difference. First operand 464 states and 636 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:03,493 INFO L93 Difference]: Finished difference Result 605 states and 768 transitions. [2023-11-29 07:08:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 07:08:03,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-29 07:08:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:03,497 INFO L225 Difference]: With dead ends: 605 [2023-11-29 07:08:03,497 INFO L226 Difference]: Without dead ends: 605 [2023-11-29 07:08:03,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-11-29 07:08:03,498 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 307 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:03,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 727 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 07:08:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-11-29 07:08:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 467. [2023-11-29 07:08:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 394 states have (on average 1.5304568527918783) internal successors, (603), 448 states have internal predecessors, (603), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 07:08:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 639 transitions. [2023-11-29 07:08:03,509 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 639 transitions. Word has length 43 [2023-11-29 07:08:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:03,509 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 639 transitions. [2023-11-29 07:08:03,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 639 transitions. [2023-11-29 07:08:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 07:08:03,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:03,510 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:03,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-11-29 07:08:03,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:03,711 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:03,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 767821057, now seen corresponding path program 1 times [2023-11-29 07:08:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:03,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146844474] [2023-11-29 07:08:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:03,713 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:03,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2023-11-29 07:08:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:03,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 07:08:03,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:03,892 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 7 [2023-11-29 07:08:04,122 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 15 treesize of output 1 [2023-11-29 07:08:04,220 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 19 treesize of output 11 [2023-11-29 07:08:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:04,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:04,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:04,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146844474] [2023-11-29 07:08:04,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146844474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:04,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:04,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 07:08:04,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523817332] [2023-11-29 07:08:04,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:04,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:08:04,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:08:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:08:04,235 INFO L87 Difference]: Start difference. First operand 467 states and 639 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:05,541 INFO L93 Difference]: Finished difference Result 849 states and 1147 transitions. [2023-11-29 07:08:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 07:08:05,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-29 07:08:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:05,546 INFO L225 Difference]: With dead ends: 849 [2023-11-29 07:08:05,546 INFO L226 Difference]: Without dead ends: 849 [2023-11-29 07:08:05,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:08:05,547 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 535 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:05,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 841 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 07:08:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-11-29 07:08:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 525. [2023-11-29 07:08:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 444 states have (on average 1.5225225225225225) internal successors, (676), 502 states have internal predecessors, (676), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 14 states have call predecessors, (32), 16 states have call successors, (32) [2023-11-29 07:08:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 724 transitions. [2023-11-29 07:08:05,557 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 724 transitions. Word has length 44 [2023-11-29 07:08:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:05,557 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 724 transitions. [2023-11-29 07:08:05,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 724 transitions. [2023-11-29 07:08:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 07:08:05,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:05,558 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:05,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2023-11-29 07:08:05,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:05,758 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:05,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 767821058, now seen corresponding path program 1 times [2023-11-29 07:08:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373665017] [2023-11-29 07:08:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:05,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:05,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:05,760 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:05,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2023-11-29 07:08:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:05,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 07:08:05,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:05,951 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 [2023-11-29 07:08:06,284 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 15 treesize of output 1 [2023-11-29 07:08:06,289 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 [2023-11-29 07:08:06,455 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 17 treesize of output 9 [2023-11-29 07:08:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:06,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:06,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:06,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373665017] [2023-11-29 07:08:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373665017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:06,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:06,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 07:08:06,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528653254] [2023-11-29 07:08:06,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:08:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:08:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:08:06,487 INFO L87 Difference]: Start difference. First operand 525 states and 724 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:08,394 INFO L93 Difference]: Finished difference Result 891 states and 1204 transitions. [2023-11-29 07:08:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 07:08:08,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-29 07:08:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:08,398 INFO L225 Difference]: With dead ends: 891 [2023-11-29 07:08:08,398 INFO L226 Difference]: Without dead ends: 891 [2023-11-29 07:08:08,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-11-29 07:08:08,399 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 455 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:08,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 945 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 07:08:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2023-11-29 07:08:08,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 473. [2023-11-29 07:08:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 400 states have (on average 1.5275) internal successors, (611), 454 states have internal predecessors, (611), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 07:08:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 647 transitions. [2023-11-29 07:08:08,410 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 647 transitions. Word has length 44 [2023-11-29 07:08:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:08,410 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 647 transitions. [2023-11-29 07:08:08,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 647 transitions. [2023-11-29 07:08:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 07:08:08,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:08,411 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:08,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2023-11-29 07:08:08,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:08,611 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:08,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 767880639, now seen corresponding path program 1 times [2023-11-29 07:08:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:08,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552533466] [2023-11-29 07:08:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:08,613 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:08,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-11-29 07:08:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:08,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 07:08:08,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:08,976 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 07:08:08,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 07:08:09,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:09,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:09,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:09,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:09,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:09,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 07:08:09,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:08:09,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:08:09,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:08:09,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:08:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:09,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:09,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:09,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552533466] [2023-11-29 07:08:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552533466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 07:08:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397344083] [2023-11-29 07:08:09,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:08:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:08:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:08:09,451 INFO L87 Difference]: Start difference. First operand 473 states and 647 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:10,212 INFO L93 Difference]: Finished difference Result 494 states and 668 transitions. [2023-11-29 07:08:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:08:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-29 07:08:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:10,215 INFO L225 Difference]: With dead ends: 494 [2023-11-29 07:08:10,215 INFO L226 Difference]: Without dead ends: 494 [2023-11-29 07:08:10,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-29 07:08:10,215 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 57 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:10,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 639 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:08:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-11-29 07:08:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 488. [2023-11-29 07:08:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 415 states have (on average 1.508433734939759) internal successors, (626), 469 states have internal predecessors, (626), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 07:08:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 662 transitions. [2023-11-29 07:08:10,225 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 662 transitions. Word has length 44 [2023-11-29 07:08:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:10,226 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 662 transitions. [2023-11-29 07:08:10,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 662 transitions. [2023-11-29 07:08:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 07:08:10,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:10,227 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:10,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2023-11-29 07:08:10,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:10,427 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:10,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1788267860, now seen corresponding path program 1 times [2023-11-29 07:08:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607215110] [2023-11-29 07:08:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:10,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:10,430 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:10,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2023-11-29 07:08:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:10,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 07:08:10,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:10,804 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 07:08:10,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 07:08:11,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:08:11,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:08:11,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:08:11,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:08:11,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:08:11,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:08:11,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 07:08:11,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 07:08:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:11,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:11,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607215110] [2023-11-29 07:08:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607215110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:11,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:11,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 07:08:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183337612] [2023-11-29 07:08:11,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:11,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 07:08:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 07:08:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-29 07:08:11,497 INFO L87 Difference]: Start difference. First operand 488 states and 662 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:13,118 INFO L93 Difference]: Finished difference Result 501 states and 675 transitions. [2023-11-29 07:08:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:08:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-29 07:08:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:13,121 INFO L225 Difference]: With dead ends: 501 [2023-11-29 07:08:13,121 INFO L226 Difference]: Without dead ends: 501 [2023-11-29 07:08:13,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-29 07:08:13,121 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 55 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:13,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 990 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 07:08:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-11-29 07:08:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 488. [2023-11-29 07:08:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 415 states have (on average 1.508433734939759) internal successors, (626), 469 states have internal predecessors, (626), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 07:08:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 662 transitions. [2023-11-29 07:08:13,128 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 662 transitions. Word has length 44 [2023-11-29 07:08:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:13,128 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 662 transitions. [2023-11-29 07:08:13,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 662 transitions. [2023-11-29 07:08:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 07:08:13,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:13,129 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:13,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2023-11-29 07:08:13,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:13,330 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:13,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:13,330 INFO L85 PathProgramCache]: Analyzing trace with hash 933446376, now seen corresponding path program 1 times [2023-11-29 07:08:13,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:13,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212528705] [2023-11-29 07:08:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:13,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:13,332 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:13,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2023-11-29 07:08:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:13,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 07:08:13,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:13,490 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 7 [2023-11-29 07:08:13,762 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 15 treesize of output 1 [2023-11-29 07:08:13,836 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 19 treesize of output 11 [2023-11-29 07:08:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:13,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:13,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212528705] [2023-11-29 07:08:13,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212528705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:13,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:13,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 07:08:13,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207424204] [2023-11-29 07:08:13,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:13,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:08:13,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:08:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:08:13,850 INFO L87 Difference]: Start difference. First operand 488 states and 662 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:14,846 INFO L93 Difference]: Finished difference Result 794 states and 1073 transitions. [2023-11-29 07:08:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 07:08:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 07:08:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:14,850 INFO L225 Difference]: With dead ends: 794 [2023-11-29 07:08:14,850 INFO L226 Difference]: Without dead ends: 794 [2023-11-29 07:08:14,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-29 07:08:14,850 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 260 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:14,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 673 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 07:08:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-11-29 07:08:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 588. [2023-11-29 07:08:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 499 states have (on average 1.501002004008016) internal successors, (749), 561 states have internal predecessors, (749), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-29 07:08:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 809 transitions. [2023-11-29 07:08:14,862 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 809 transitions. Word has length 45 [2023-11-29 07:08:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:14,862 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 809 transitions. [2023-11-29 07:08:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 809 transitions. [2023-11-29 07:08:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 07:08:14,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:14,863 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:14,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2023-11-29 07:08:15,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:15,064 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:15,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash 933446377, now seen corresponding path program 1 times [2023-11-29 07:08:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:15,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808115482] [2023-11-29 07:08:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:15,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:15,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:15,066 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:15,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-11-29 07:08:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:15,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 07:08:15,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:15,231 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 [2023-11-29 07:08:15,614 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 [2023-11-29 07:08:15,623 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 15 treesize of output 1 [2023-11-29 07:08:15,736 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 17 treesize of output 9 [2023-11-29 07:08:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:15,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:15,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808115482] [2023-11-29 07:08:15,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808115482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:15,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:15,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 07:08:15,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303894523] [2023-11-29 07:08:15,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:15,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:08:15,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:15,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:08:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:08:15,761 INFO L87 Difference]: Start difference. First operand 588 states and 809 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:16,868 INFO L93 Difference]: Finished difference Result 865 states and 1177 transitions. [2023-11-29 07:08:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 07:08:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 07:08:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:16,872 INFO L225 Difference]: With dead ends: 865 [2023-11-29 07:08:16,872 INFO L226 Difference]: Without dead ends: 865 [2023-11-29 07:08:16,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 07:08:16,872 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 273 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:16,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 715 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 07:08:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-29 07:08:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 662. [2023-11-29 07:08:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 565 states have (on average 1.5292035398230088) internal successors, (864), 631 states have internal predecessors, (864), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 18 states have call predecessors, (48), 24 states have call successors, (48) [2023-11-29 07:08:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 936 transitions. [2023-11-29 07:08:16,888 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 936 transitions. Word has length 45 [2023-11-29 07:08:16,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:16,888 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 936 transitions. [2023-11-29 07:08:16,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 936 transitions. [2023-11-29 07:08:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 07:08:16,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:16,890 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:16,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2023-11-29 07:08:17,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:17,090 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:17,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash 353980799, now seen corresponding path program 1 times [2023-11-29 07:08:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015294837] [2023-11-29 07:08:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:17,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:17,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:17,092 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:17,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2023-11-29 07:08:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:17,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 07:08:17,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:17,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:17,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:17,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015294837] [2023-11-29 07:08:17,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015294837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:17,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:17,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:08:17,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511119811] [2023-11-29 07:08:17,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:08:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:08:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:08:17,418 INFO L87 Difference]: Start difference. First operand 662 states and 936 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:08:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:17,866 INFO L93 Difference]: Finished difference Result 661 states and 925 transitions. [2023-11-29 07:08:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:08:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2023-11-29 07:08:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:17,870 INFO L225 Difference]: With dead ends: 661 [2023-11-29 07:08:17,870 INFO L226 Difference]: Without dead ends: 661 [2023-11-29 07:08:17,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:08:17,871 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 174 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:17,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 227 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:08:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-29 07:08:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2023-11-29 07:08:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 565 states have (on average 1.5097345132743363) internal successors, (853), 630 states have internal predecessors, (853), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 18 states have call predecessors, (48), 24 states have call successors, (48) [2023-11-29 07:08:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 925 transitions. [2023-11-29 07:08:17,883 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 925 transitions. Word has length 46 [2023-11-29 07:08:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:17,884 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 925 transitions. [2023-11-29 07:08:17,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:08:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 925 transitions. [2023-11-29 07:08:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 07:08:17,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:17,885 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:17,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2023-11-29 07:08:18,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:18,085 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:18,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1839390299, now seen corresponding path program 1 times [2023-11-29 07:08:18,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:18,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688925610] [2023-11-29 07:08:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:18,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:18,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:18,087 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:18,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2023-11-29 07:08:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:18,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 07:08:18,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:18,273 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 7 [2023-11-29 07:08:18,615 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 15 treesize of output 1 [2023-11-29 07:08:18,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 07:08:18,742 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 19 treesize of output 11 [2023-11-29 07:08:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:18,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:18,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:18,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688925610] [2023-11-29 07:08:18,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688925610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:18,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:18,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 07:08:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198073695] [2023-11-29 07:08:18,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:18,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:08:18,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:18,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:08:18,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:08:18,755 INFO L87 Difference]: Start difference. First operand 661 states and 925 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:20,835 INFO L93 Difference]: Finished difference Result 1155 states and 1564 transitions. [2023-11-29 07:08:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 07:08:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 07:08:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:20,840 INFO L225 Difference]: With dead ends: 1155 [2023-11-29 07:08:20,841 INFO L226 Difference]: Without dead ends: 1155 [2023-11-29 07:08:20,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-29 07:08:20,841 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 401 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:20,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1337 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 07:08:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2023-11-29 07:08:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 787. [2023-11-29 07:08:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 675 states have (on average 1.4874074074074075) internal successors, (1004), 748 states have internal predecessors, (1004), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 22 states have call predecessors, (64), 32 states have call successors, (64) [2023-11-29 07:08:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1100 transitions. [2023-11-29 07:08:20,855 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1100 transitions. Word has length 45 [2023-11-29 07:08:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:20,855 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1100 transitions. [2023-11-29 07:08:20,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1100 transitions. [2023-11-29 07:08:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 07:08:20,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:20,855 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:20,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2023-11-29 07:08:21,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:21,056 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:21,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1839390298, now seen corresponding path program 1 times [2023-11-29 07:08:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525976263] [2023-11-29 07:08:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:21,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:21,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:21,058 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:21,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-11-29 07:08:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:21,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 07:08:21,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:21,266 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 [2023-11-29 07:08:21,754 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 [2023-11-29 07:08:21,765 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 15 treesize of output 1 [2023-11-29 07:08:21,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 07:08:21,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 07:08:21,961 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 17 treesize of output 9 [2023-11-29 07:08:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:21,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:21,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:21,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525976263] [2023-11-29 07:08:21,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525976263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:21,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:21,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 07:08:21,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491822248] [2023-11-29 07:08:21,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:21,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:08:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:08:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:08:21,984 INFO L87 Difference]: Start difference. First operand 787 states and 1100 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:24,370 INFO L93 Difference]: Finished difference Result 1226 states and 1666 transitions. [2023-11-29 07:08:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 07:08:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-29 07:08:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:24,375 INFO L225 Difference]: With dead ends: 1226 [2023-11-29 07:08:24,375 INFO L226 Difference]: Without dead ends: 1226 [2023-11-29 07:08:24,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-29 07:08:24,376 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 417 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:24,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1513 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 07:08:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2023-11-29 07:08:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 687. [2023-11-29 07:08:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 591 states have (on average 1.49746192893401) internal successors, (885), 656 states have internal predecessors, (885), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 18 states have call predecessors, (48), 24 states have call successors, (48) [2023-11-29 07:08:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 957 transitions. [2023-11-29 07:08:24,388 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 957 transitions. Word has length 45 [2023-11-29 07:08:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:24,388 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 957 transitions. [2023-11-29 07:08:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 957 transitions. [2023-11-29 07:08:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 07:08:24,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:24,389 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:24,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2023-11-29 07:08:24,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:24,590 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:24,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1129781716, now seen corresponding path program 1 times [2023-11-29 07:08:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:24,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163061745] [2023-11-29 07:08:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:24,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:24,592 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:24,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2023-11-29 07:08:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:24,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:08:24,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:24,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 07:08:25,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-29 07:08:25,109 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 16 treesize of output 8 [2023-11-29 07:08:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:25,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:25,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:25,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163061745] [2023-11-29 07:08:25,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163061745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:25,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:25,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 07:08:25,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116588251] [2023-11-29 07:08:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:25,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 07:08:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 07:08:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-29 07:08:25,121 INFO L87 Difference]: Start difference. First operand 687 states and 957 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:26,249 INFO L93 Difference]: Finished difference Result 1113 states and 1524 transitions. [2023-11-29 07:08:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 07:08:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-29 07:08:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:26,254 INFO L225 Difference]: With dead ends: 1113 [2023-11-29 07:08:26,254 INFO L226 Difference]: Without dead ends: 1113 [2023-11-29 07:08:26,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-11-29 07:08:26,255 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 590 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:26,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1208 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 07:08:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-11-29 07:08:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 779. [2023-11-29 07:08:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 671 states have (on average 1.5022354694485842) internal successors, (1008), 742 states have internal predecessors, (1008), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 21 states have call predecessors, (60), 30 states have call successors, (60) [2023-11-29 07:08:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1098 transitions. [2023-11-29 07:08:26,272 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1098 transitions. Word has length 46 [2023-11-29 07:08:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:26,272 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1098 transitions. [2023-11-29 07:08:26,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1098 transitions. [2023-11-29 07:08:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 07:08:26,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:26,273 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:26,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2023-11-29 07:08:26,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:26,474 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:26,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1127934674, now seen corresponding path program 1 times [2023-11-29 07:08:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:26,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790161891] [2023-11-29 07:08:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:26,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:26,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:26,475 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:26,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2023-11-29 07:08:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:26,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 07:08:26,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:26,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 07:08:26,936 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 16 treesize of output 8 [2023-11-29 07:08:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:26,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:26,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790161891] [2023-11-29 07:08:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790161891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:26,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:26,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 07:08:26,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526150151] [2023-11-29 07:08:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:26,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:08:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:08:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:08:26,947 INFO L87 Difference]: Start difference. First operand 779 states and 1098 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:27,682 INFO L93 Difference]: Finished difference Result 1152 states and 1601 transitions. [2023-11-29 07:08:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 07:08:27,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-29 07:08:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:27,698 INFO L225 Difference]: With dead ends: 1152 [2023-11-29 07:08:27,698 INFO L226 Difference]: Without dead ends: 1152 [2023-11-29 07:08:27,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 07:08:27,699 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 318 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:27,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 857 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 07:08:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2023-11-29 07:08:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 953. [2023-11-29 07:08:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 821 states have (on average 1.510353227771011) internal successors, (1240), 904 states have internal predecessors, (1240), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 27 states have call predecessors, (84), 42 states have call successors, (84) [2023-11-29 07:08:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1366 transitions. [2023-11-29 07:08:27,720 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1366 transitions. Word has length 46 [2023-11-29 07:08:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:27,720 INFO L495 AbstractCegarLoop]: Abstraction has 953 states and 1366 transitions. [2023-11-29 07:08:27,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1366 transitions. [2023-11-29 07:08:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 07:08:27,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:27,721 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:27,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2023-11-29 07:08:27,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:27,922 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:27,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1186525679, now seen corresponding path program 1 times [2023-11-29 07:08:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:27,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608702663] [2023-11-29 07:08:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:27,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:27,924 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:27,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2023-11-29 07:08:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:28,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 07:08:28,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:28,354 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 25 treesize of output 17 [2023-11-29 07:08:28,356 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 21 treesize of output 13 [2023-11-29 07:08:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:28,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:28,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608702663] [2023-11-29 07:08:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608702663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:28,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:28,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 07:08:28,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806174972] [2023-11-29 07:08:28,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:28,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:08:28,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:08:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:08:28,374 INFO L87 Difference]: Start difference. First operand 953 states and 1366 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:29,861 INFO L93 Difference]: Finished difference Result 1327 states and 1860 transitions. [2023-11-29 07:08:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 07:08:29,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-29 07:08:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:29,867 INFO L225 Difference]: With dead ends: 1327 [2023-11-29 07:08:29,867 INFO L226 Difference]: Without dead ends: 1327 [2023-11-29 07:08:29,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-29 07:08:29,868 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 325 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:29,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1681 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 07:08:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2023-11-29 07:08:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 818. [2023-11-29 07:08:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 706 states have (on average 1.5127478753541077) internal successors, (1068), 779 states have internal predecessors, (1068), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 22 states have call predecessors, (64), 32 states have call successors, (64) [2023-11-29 07:08:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1164 transitions. [2023-11-29 07:08:29,883 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1164 transitions. Word has length 46 [2023-11-29 07:08:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:29,883 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1164 transitions. [2023-11-29 07:08:29,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1164 transitions. [2023-11-29 07:08:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 07:08:29,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:29,884 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:29,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2023-11-29 07:08:30,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:30,084 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:30,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -663425663, now seen corresponding path program 1 times [2023-11-29 07:08:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964263550] [2023-11-29 07:08:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:30,086 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:30,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2023-11-29 07:08:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:30,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 07:08:30,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:30,374 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 07:08:30,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 07:08:30,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 07:08:30,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 07:08:30,902 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 23 treesize of output 11 [2023-11-29 07:08:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:30,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:31,307 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 78 treesize of output 74 [2023-11-29 07:08:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:31,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:31,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964263550] [2023-11-29 07:08:31,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964263550] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:31,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:08:31,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-29 07:08:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375679993] [2023-11-29 07:08:31,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:31,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:08:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:08:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-29 07:08:31,647 INFO L87 Difference]: Start difference. First operand 818 states and 1164 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:33,152 INFO L93 Difference]: Finished difference Result 1062 states and 1474 transitions. [2023-11-29 07:08:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:08:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-11-29 07:08:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:33,158 INFO L225 Difference]: With dead ends: 1062 [2023-11-29 07:08:33,158 INFO L226 Difference]: Without dead ends: 1062 [2023-11-29 07:08:33,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-11-29 07:08:33,159 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 207 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:33,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 750 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 07:08:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2023-11-29 07:08:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 867. [2023-11-29 07:08:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 751 states have (on average 1.5246338215712383) internal successors, (1145), 826 states have internal predecessors, (1145), 34 states have call successors, (34), 17 states have call predecessors, (34), 34 states have return successors, (68), 23 states have call predecessors, (68), 34 states have call successors, (68) [2023-11-29 07:08:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1247 transitions. [2023-11-29 07:08:33,173 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1247 transitions. Word has length 47 [2023-11-29 07:08:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:33,173 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1247 transitions. [2023-11-29 07:08:33,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1247 transitions. [2023-11-29 07:08:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 07:08:33,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:33,174 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:33,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2023-11-29 07:08:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:33,375 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:33,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash -606167361, now seen corresponding path program 1 times [2023-11-29 07:08:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884242840] [2023-11-29 07:08:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:33,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:33,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:33,376 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:33,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2023-11-29 07:08:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:33,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 07:08:33,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:33,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 07:08:34,070 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 23 treesize of output 11 [2023-11-29 07:08:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:34,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:34,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:34,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884242840] [2023-11-29 07:08:34,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884242840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:34,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:34,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 07:08:34,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394698943] [2023-11-29 07:08:34,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:34,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:08:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:08:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:08:34,103 INFO L87 Difference]: Start difference. First operand 867 states and 1247 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:35,139 INFO L93 Difference]: Finished difference Result 1240 states and 1750 transitions. [2023-11-29 07:08:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 07:08:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-11-29 07:08:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:35,143 INFO L225 Difference]: With dead ends: 1240 [2023-11-29 07:08:35,143 INFO L226 Difference]: Without dead ends: 1240 [2023-11-29 07:08:35,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 07:08:35,144 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 359 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:35,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 783 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 07:08:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2023-11-29 07:08:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1041. [2023-11-29 07:08:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 901 states have (on average 1.528301886792453) internal successors, (1377), 988 states have internal predecessors, (1377), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 29 states have call predecessors, (92), 46 states have call successors, (92) [2023-11-29 07:08:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1515 transitions. [2023-11-29 07:08:35,165 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1515 transitions. Word has length 47 [2023-11-29 07:08:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:35,166 INFO L495 AbstractCegarLoop]: Abstraction has 1041 states and 1515 transitions. [2023-11-29 07:08:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1515 transitions. [2023-11-29 07:08:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 07:08:35,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:35,166 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:35,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2023-11-29 07:08:35,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:35,367 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:35,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:35,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1872478780, now seen corresponding path program 1 times [2023-11-29 07:08:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:35,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342442073] [2023-11-29 07:08:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:35,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:35,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:35,369 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:35,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-11-29 07:08:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:35,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 07:08:35,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:35,711 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 07:08:35,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 07:08:36,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 07:08:36,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 07:08:36,448 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 23 treesize of output 11 [2023-11-29 07:08:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:36,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:36,946 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 190 treesize of output 178 [2023-11-29 07:08:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:37,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:37,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342442073] [2023-11-29 07:08:37,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342442073] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:37,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:08:37,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2023-11-29 07:08:37,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441665852] [2023-11-29 07:08:37,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:37,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:08:37,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:37,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:08:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-29 07:08:37,801 INFO L87 Difference]: Start difference. First operand 1041 states and 1515 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:42,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:08:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:47,078 INFO L93 Difference]: Finished difference Result 1482 states and 2087 transitions. [2023-11-29 07:08:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 07:08:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-11-29 07:08:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:47,083 INFO L225 Difference]: With dead ends: 1482 [2023-11-29 07:08:47,083 INFO L226 Difference]: Without dead ends: 1482 [2023-11-29 07:08:47,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-11-29 07:08:47,084 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 257 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:47,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1510 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-11-29 07:08:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2023-11-29 07:08:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1096. [2023-11-29 07:08:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 948 states have (on average 1.5443037974683544) internal successors, (1464), 1039 states have internal predecessors, (1464), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 31 states have call predecessors, (100), 50 states have call successors, (100) [2023-11-29 07:08:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1614 transitions. [2023-11-29 07:08:47,112 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1614 transitions. Word has length 47 [2023-11-29 07:08:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:47,113 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1614 transitions. [2023-11-29 07:08:47,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 07:08:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1614 transitions. [2023-11-29 07:08:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 07:08:47,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:47,114 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:47,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2023-11-29 07:08:47,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:47,314 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:47,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1301649672, now seen corresponding path program 1 times [2023-11-29 07:08:47,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646860041] [2023-11-29 07:08:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:47,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:47,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:47,316 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:47,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2023-11-29 07:08:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:47,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 07:08:47,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:47,598 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 07:08:47,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 07:08:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:48,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:48,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:48,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646860041] [2023-11-29 07:08:48,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646860041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:48,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1828652225] [2023-11-29 07:08:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:48,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-29 07:08:48,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-29 07:08:48,455 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-29 07:08:48,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2023-11-29 07:08:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:48,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 07:08:48,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:48,860 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-29 07:08:48,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 07:08:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:49,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:49,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1828652225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:49,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:08:49,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2023-11-29 07:08:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319100130] [2023-11-29 07:08:49,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:08:49,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 07:08:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:49,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 07:08:49,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-29 07:08:49,618 INFO L87 Difference]: Start difference. First operand 1096 states and 1614 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 07:08:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:50,758 INFO L93 Difference]: Finished difference Result 1652 states and 2411 transitions. [2023-11-29 07:08:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:08:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2023-11-29 07:08:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:50,762 INFO L225 Difference]: With dead ends: 1652 [2023-11-29 07:08:50,762 INFO L226 Difference]: Without dead ends: 1652 [2023-11-29 07:08:50,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-11-29 07:08:50,763 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 510 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:50,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 474 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 07:08:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2023-11-29 07:08:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1095. [2023-11-29 07:08:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 948 states have (on average 1.5253164556962024) internal successors, (1446), 1038 states have internal predecessors, (1446), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 31 states have call predecessors, (100), 50 states have call successors, (100) [2023-11-29 07:08:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1596 transitions. [2023-11-29 07:08:50,788 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1596 transitions. Word has length 49 [2023-11-29 07:08:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:50,788 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1596 transitions. [2023-11-29 07:08:50,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 07:08:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1596 transitions. [2023-11-29 07:08:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 07:08:50,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:50,789 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:50,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2023-11-29 07:08:50,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2023-11-29 07:08:51,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt [2023-11-29 07:08:51,190 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:51,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1696799980, now seen corresponding path program 1 times [2023-11-29 07:08:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:51,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930266879] [2023-11-29 07:08:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:51,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:51,192 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:51,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2023-11-29 07:08:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:51,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:08:51,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:51,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:08:51,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930266879] [2023-11-29 07:08:51,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930266879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:08:51,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:08:51,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:08:51,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920879483] [2023-11-29 07:08:51,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:08:51,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:08:51,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:08:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:08:51,402 INFO L87 Difference]: Start difference. First operand 1095 states and 1596 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:08:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:52,030 INFO L93 Difference]: Finished difference Result 1249 states and 1774 transitions. [2023-11-29 07:08:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:08:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-11-29 07:08:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:52,033 INFO L225 Difference]: With dead ends: 1249 [2023-11-29 07:08:52,033 INFO L226 Difference]: Without dead ends: 1249 [2023-11-29 07:08:52,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:08:52,034 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 219 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:52,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 295 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:08:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2023-11-29 07:08:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1122. [2023-11-29 07:08:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 975 states have (on average 1.4964102564102564) internal successors, (1459), 1061 states have internal predecessors, (1459), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2023-11-29 07:08:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1615 transitions. [2023-11-29 07:08:52,049 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1615 transitions. Word has length 50 [2023-11-29 07:08:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:52,049 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1615 transitions. [2023-11-29 07:08:52,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 07:08:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1615 transitions. [2023-11-29 07:08:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 07:08:52,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:52,050 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:08:52,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2023-11-29 07:08:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:52,251 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:52,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1696799981, now seen corresponding path program 1 times [2023-11-29 07:08:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:52,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839072251] [2023-11-29 07:08:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:52,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:52,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:52,253 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:52,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2023-11-29 07:08:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:52,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:08:52,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:52,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:53,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:08:53,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-11-29 07:08:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:08:53,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839072251] [2023-11-29 07:08:53,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839072251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:08:53,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:08:53,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2023-11-29 07:08:53,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395699407] [2023-11-29 07:08:53,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:08:53,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 07:08:53,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:08:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 07:08:53,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 07:08:53,432 INFO L87 Difference]: Start difference. First operand 1122 states and 1615 transitions. Second operand has 14 states, 13 states have (on average 7.0) internal successors, (91), 12 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:08:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:08:54,815 INFO L93 Difference]: Finished difference Result 1236 states and 1719 transitions. [2023-11-29 07:08:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:08:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 7.0) internal successors, (91), 12 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-11-29 07:08:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:08:54,817 INFO L225 Difference]: With dead ends: 1236 [2023-11-29 07:08:54,817 INFO L226 Difference]: Without dead ends: 1236 [2023-11-29 07:08:54,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2023-11-29 07:08:54,818 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 914 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:08:54,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 554 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 07:08:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2023-11-29 07:08:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1120. [2023-11-29 07:08:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 975 states have (on average 1.4666666666666666) internal successors, (1430), 1059 states have internal predecessors, (1430), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2023-11-29 07:08:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1586 transitions. [2023-11-29 07:08:54,832 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1586 transitions. Word has length 50 [2023-11-29 07:08:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:08:54,832 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1586 transitions. [2023-11-29 07:08:54,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 7.0) internal successors, (91), 12 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:08:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1586 transitions. [2023-11-29 07:08:54,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 07:08:54,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:08:54,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-11-29 07:08:54,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2023-11-29 07:08:55,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:55,033 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:08:55,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:08:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash 643730812, now seen corresponding path program 1 times [2023-11-29 07:08:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:08:55,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210331548] [2023-11-29 07:08:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:55,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:08:55,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:08:55,035 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:08:55,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2023-11-29 07:08:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:55,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 07:08:55,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:55,333 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-29 07:08:55,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 22 [2023-11-29 07:08:55,783 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 15 treesize of output 1 [2023-11-29 07:08:55,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2023-11-29 07:08:56,089 INFO L349 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2023-11-29 07:08:56,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 60 [2023-11-29 07:08:56,246 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 19 treesize of output 11 [2023-11-29 07:08:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:56,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:08:56,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:08:56,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210331548] [2023-11-29 07:08:56,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210331548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:08:56,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [472300129] [2023-11-29 07:08:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:08:56,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-29 07:08:56,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-29 07:08:56,534 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-29 07:08:56,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2023-11-29 07:08:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:08:56,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 07:08:56,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:08:57,101 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 07:08:57,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 07:08:57,619 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 15 treesize of output 1 [2023-11-29 07:08:57,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 07:08:58,076 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-11-29 07:08:58,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 44 [2023-11-29 07:08:58,204 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 19 treesize of output 11 [2023-11-29 07:08:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:08:58,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:05,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [472300129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:05,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:09:05,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 07:09:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664858868] [2023-11-29 07:09:05,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:09:05,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 07:09:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:09:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 07:09:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=831, Unknown=1, NotChecked=0, Total=930 [2023-11-29 07:09:05,129 INFO L87 Difference]: Start difference. First operand 1120 states and 1586 transitions. Second operand has 26 states, 25 states have (on average 3.68) internal successors, (92), 21 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:09:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:09:10,574 INFO L93 Difference]: Finished difference Result 1628 states and 2183 transitions. [2023-11-29 07:09:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 07:09:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 21 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-11-29 07:09:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:09:10,578 INFO L225 Difference]: With dead ends: 1628 [2023-11-29 07:09:10,578 INFO L226 Difference]: Without dead ends: 1628 [2023-11-29 07:09:10,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=712, Invalid=4399, Unknown=1, NotChecked=0, Total=5112 [2023-11-29 07:09:10,579 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1446 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:09:10,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1447 Valid, 2376 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 07:09:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2023-11-29 07:09:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1138. [2023-11-29 07:09:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 993 states have (on average 1.4622356495468278) internal successors, (1452), 1075 states have internal predecessors, (1452), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 36 states have call predecessors, (104), 52 states have call successors, (104) [2023-11-29 07:09:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1608 transitions. [2023-11-29 07:09:10,594 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1608 transitions. Word has length 50 [2023-11-29 07:09:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:09:10,594 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1608 transitions. [2023-11-29 07:09:10,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 21 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:09:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1608 transitions. [2023-11-29 07:09:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 07:09:10,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:09:10,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-11-29 07:09:10,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2023-11-29 07:09:10,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2023-11-29 07:09:10,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt [2023-11-29 07:09:10,996 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:09:10,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash 643730813, now seen corresponding path program 1 times [2023-11-29 07:09:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:09:10,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969405191] [2023-11-29 07:09:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:10,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:09:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:09:10,997 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:09:10,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2023-11-29 07:09:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:11,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 07:09:11,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:11,267 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 [2023-11-29 07:09:11,677 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 [2023-11-29 07:09:11,696 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 15 treesize of output 1 [2023-11-29 07:09:11,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 07:09:11,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:09:12,036 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 07:09:12,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 07:09:12,264 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 17 treesize of output 9 [2023-11-29 07:09:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:09:12,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:13,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:09:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969405191] [2023-11-29 07:09:13,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969405191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652398693] [2023-11-29 07:09:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-29 07:09:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-29 07:09:13,142 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-29 07:09:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2023-11-29 07:09:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:13,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 07:09:13,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:13,849 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 7 [2023-11-29 07:09:13,859 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 [2023-11-29 07:09:14,582 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 15 treesize of output 1 [2023-11-29 07:09:14,595 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 [2023-11-29 07:09:14,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:09:14,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2023-11-29 07:09:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:09:15,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 07:09:15,244 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-11-29 07:09:15,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-29 07:09:15,543 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 17 treesize of output 9 [2023-11-29 07:09:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:09:15,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:18,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652398693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:18,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:09:18,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2023-11-29 07:09:18,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288135743] [2023-11-29 07:09:18,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:09:18,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 07:09:18,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:09:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 07:09:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 07:09:18,211 INFO L87 Difference]: Start difference. First operand 1138 states and 1608 transitions. Second operand has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 23 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:09:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:09:23,960 INFO L93 Difference]: Finished difference Result 1572 states and 2155 transitions. [2023-11-29 07:09:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 07:09:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 23 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-11-29 07:09:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:09:23,962 INFO L225 Difference]: With dead ends: 1572 [2023-11-29 07:09:23,962 INFO L226 Difference]: Without dead ends: 1572 [2023-11-29 07:09:23,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=505, Invalid=2575, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 07:09:23,963 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1002 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:09:23,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 1649 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 07:09:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2023-11-29 07:09:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1165. [2023-11-29 07:09:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1020 states have (on average 1.4549019607843137) internal successors, (1484), 1099 states have internal predecessors, (1484), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 39 states have call predecessors, (104), 52 states have call successors, (104) [2023-11-29 07:09:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1640 transitions. [2023-11-29 07:09:23,979 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1640 transitions. Word has length 50 [2023-11-29 07:09:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:09:23,980 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1640 transitions. [2023-11-29 07:09:23,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 23 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:09:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1640 transitions. [2023-11-29 07:09:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 07:09:23,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:09:23,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:23,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2023-11-29 07:09:24,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2023-11-29 07:09:24,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:09:24,381 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:09:24,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:24,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1381802784, now seen corresponding path program 1 times [2023-11-29 07:09:24,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:09:24,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931563182] [2023-11-29 07:09:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:24,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:09:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:09:24,383 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:09:24,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2023-11-29 07:09:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:24,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 07:09:24,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:24,618 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 [2023-11-29 07:09:25,031 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 [2023-11-29 07:09:25,041 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 15 treesize of output 1 [2023-11-29 07:09:25,265 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 07:09:25,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 07:09:25,445 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 17 treesize of output 9 [2023-11-29 07:09:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:09:25,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:26,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:09:26,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931563182] [2023-11-29 07:09:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931563182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:26,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117030114] [2023-11-29 07:09:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:26,258 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-29 07:09:26,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-29 07:09:26,259 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-29 07:09:26,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2023-11-29 07:09:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:26,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 07:09:26,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:26,755 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 7 [2023-11-29 07:09:26,773 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 [2023-11-29 07:09:27,508 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 [2023-11-29 07:09:27,524 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 15 treesize of output 1 [2023-11-29 07:09:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:09:27,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 07:09:28,014 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-11-29 07:09:28,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-29 07:09:28,260 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 17 treesize of output 9 [2023-11-29 07:09:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:09:28,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117030114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:33,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:09:33,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-11-29 07:09:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622779359] [2023-11-29 07:09:33,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:09:33,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 07:09:33,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:09:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 07:09:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=698, Unknown=1, NotChecked=0, Total=812 [2023-11-29 07:09:33,453 INFO L87 Difference]: Start difference. First operand 1165 states and 1640 transitions. Second operand has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:09:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:09:37,149 INFO L93 Difference]: Finished difference Result 1528 states and 2092 transitions. [2023-11-29 07:09:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 07:09:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2023-11-29 07:09:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:09:37,151 INFO L225 Difference]: With dead ends: 1528 [2023-11-29 07:09:37,151 INFO L226 Difference]: Without dead ends: 1528 [2023-11-29 07:09:37,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=363, Invalid=1528, Unknown=1, NotChecked=0, Total=1892 [2023-11-29 07:09:37,152 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 831 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:09:37,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 1130 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 07:09:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2023-11-29 07:09:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1147. [2023-11-29 07:09:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1002 states have (on average 1.4590818363273452) internal successors, (1462), 1083 states have internal predecessors, (1462), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 37 states have call predecessors, (104), 52 states have call successors, (104) [2023-11-29 07:09:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1618 transitions. [2023-11-29 07:09:37,165 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1618 transitions. Word has length 50 [2023-11-29 07:09:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:09:37,166 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1618 transitions. [2023-11-29 07:09:37,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.380952380952381) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 07:09:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1618 transitions. [2023-11-29 07:09:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 07:09:37,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:09:37,166 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:09:37,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2023-11-29 07:09:37,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2023-11-29 07:09:37,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt [2023-11-29 07:09:37,567 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-29 07:09:37,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:09:37,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1325883230, now seen corresponding path program 1 times [2023-11-29 07:09:37,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:09:37,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005906018] [2023-11-29 07:09:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:37,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 07:09:37,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:09:37,569 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 07:09:37,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2023-11-29 07:09:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:37,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 07:09:37,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:38,003 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 07:09:38,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 07:09:38,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:09:38,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:09:38,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:38,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:38,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:38,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:39,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 07:09:39,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 07:09:39,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 07:09:39,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 07:09:39,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 07:09:39,339 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-11-29 07:09:39,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 32 [2023-11-29 07:09:39,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:09:39,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 15 [2023-11-29 07:09:39,665 INFO L349 Elim1Store]: treesize reduction 15, result has 34.8 percent of original size [2023-11-29 07:09:39,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 22 [2023-11-29 07:09:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:09:39,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:40,120 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1414)) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))) (forall ((v_ArrVal_1414 (_ BitVec 32))) (= (select (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1414)))) (select .cse2 (select (select .cse2 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))))) is different from false [2023-11-29 07:09:40,168 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_append_one_~item~1#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1414)) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))) (forall ((v_ArrVal_1414 (_ BitVec 32))) (= (select (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1414)))) (select .cse2 (select (select .cse2 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))))) is different from false [2023-11-29 07:09:40,247 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~head~0#1.base|) .cse1 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))) (forall ((v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32))) (= (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~head~0#1.base|) .cse1 v_ArrVal_1414))))) (select .cse2 (select (select .cse2 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))))) is different from false [2023-11-29 07:09:40,545 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse4 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (forall ((v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32))) (= (_ bv0 32) (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse3 .cse4 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1414))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)))) (forall ((v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse5 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse3 .cse4 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))) (not (= (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 (select v_ArrVal_1404 .cse4)) v_ArrVal_1404)))))) is different from false [2023-11-29 07:09:40,847 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse10 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse6 (= (_ bv8 32) .cse10)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse8 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse4 (bvadd .cse10 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse5 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (forall ((v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32))) (= (_ bv0 32) (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1414))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)))) (or (not .cse6) (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse7 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse7 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse7 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)) (not (= (store .cse8 .cse5 (select v_ArrVal_1404 .cse5)) v_ArrVal_1404))))) (or .cse6 (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)) (not (= (store (store .cse8 .cse4 (select v_ArrVal_1404 .cse4)) .cse5 (select v_ArrVal_1404 .cse5)) v_ArrVal_1404)))))))) is different from false [2023-11-29 07:09:41,648 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (bvadd (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~link_field~0#1|) |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse10 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse6 (= (_ bv8 32) .cse10)) (.cse0 (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 |c_ULTIMATE.start_create_item_~link~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse5 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 |c_ULTIMATE.start_create_item_~link~0#1.base|)) (.cse1 (bvadd .cse10 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (or (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store (store .cse0 .cse1 (select v_ArrVal_1404 .cse1)) .cse2 (select v_ArrVal_1404 .cse2)) v_ArrVal_1404)) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse3 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse5 .cse1 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse2 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)))) .cse6) (forall ((v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32))) (= (select (let ((.cse7 (let ((.cse8 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse5 .cse1 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse2 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse8 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse8 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 v_ArrVal_1414))))) (select .cse7 (select (select .cse7 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))) (or (not .cse6) (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store .cse0 .cse2 (select v_ArrVal_1404 .cse2)) v_ArrVal_1404)) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse5 .cse1 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse2 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)))))))) is different from false [2023-11-29 07:09:41,965 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (bvadd (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~link_field~0#1|) |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse10 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse0 (= (_ bv8 32) .cse10)) (.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse5 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|))) (.cse1 (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|))) (.cse6 (bvadd .cse10 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (or (not .cse0) (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store .cse1 .cse2 (select v_ArrVal_1404 .cse2)) v_ArrVal_1404)) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse3 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse5 .cse6 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse2 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))))) (forall ((v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32))) (= (_ bv0 32) (select (let ((.cse7 (let ((.cse8 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse5 .cse6 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse2 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse8 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse8 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 v_ArrVal_1414))))) (select .cse7 (select (select .cse7 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)))) (or .cse0 (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse5 .cse6 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse2 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)) (not (= (store (store .cse1 .cse6 (select v_ArrVal_1404 .cse6)) .cse2 (select v_ArrVal_1404 .cse2)) v_ArrVal_1404)))))))) is different from false [2023-11-29 07:09:45,660 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse2 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|))) (.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (forall ((v_ArrVal_1407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1407) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1413) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse2 |c_ULTIMATE.start_create_item_~item~0#1.offset| |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse3 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse1 v_ArrVal_1414))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)) (not (= v_ArrVal_1404 (store (store (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse4 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|)) |c_ULTIMATE.start_create_item_~item~0#1.offset| (select v_ArrVal_1404 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) .cse3 (select v_ArrVal_1404 .cse3)))))) (forall ((v_ArrVal_1408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (_ BitVec 32)) (v_ArrVal_1406 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32))) (= (select (let ((.cse5 (let ((.cse6 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse2 |c_ULTIMATE.start_create_item_~item~0#1.offset| |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse3 v_ArrVal_1406)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1408))) (store .cse6 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse6 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse1 v_ArrVal_1414))))) (select .cse5 (select (select .cse5 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32)))))) is different from false [2023-11-29 07:09:46,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:09:46,147 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2023-11-29 07:09:46,166 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#list~0.offset| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_#t~ret30#1|)))) (and (forall ((v_ArrVal_1406 (_ BitVec 32)) (v_arrayElimArr_1 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32))) (let ((.cse0 (select v_arrayElimArr_1 |c_~#list~0.offset|))) (or (not (= (select |c_#valid| .cse0) (_ bv0 1))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 (store (store (store (select |c_#memory_$Pointer$#1.base| .cse0) (_ bv4 32) (select (select |c_#memory_$Pointer$#1.base| |c_~#list~0.base|) .cse1)) (_ bv0 32) |ULTIMATE.start_create_item_#t~ite16#1.base|) (_ bv8 32) v_ArrVal_1406)) |c_~#list~0.base| v_arrayElimArr_1) .cse0) (_ bv4 32)) (_ bv0 32))))) (forall ((|v_ULTIMATE.start_create_item_~item~0#1.base_43| (_ BitVec 32))) (or (forall ((v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_create_item_~item~0#1.base_43| v_ArrVal_1404) |c_~#list~0.base| v_ArrVal_1413) |v_ULTIMATE.start_create_item_~item~0#1.base_43|) (_ bv4 32)) (_ bv0 32)) (not (= v_ArrVal_1404 (store (store (store (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_create_item_~item~0#1.base_43|) (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| |c_~#list~0.base|) .cse1)) (_ bv0 32) (select v_ArrVal_1404 (_ bv0 32))) (_ bv8 32) (select v_ArrVal_1404 (_ bv8 32))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_item_~item~0#1.base_43|))))))) is different from false [2023-11-29 07:09:46,219 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_item_~item~0#1.base_43| (_ BitVec 32))) (or (forall ((v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1404 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_create_item_~item~0#1.base_43| v_ArrVal_1404) |c_~#list~0.base| v_ArrVal_1413) |v_ULTIMATE.start_create_item_~item~0#1.base_43|) (_ bv4 32)) (_ bv0 32)) (not (= (store (store (store (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_create_item_~item~0#1.base_43|) (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv0 32) (select v_ArrVal_1404 (_ bv0 32))) (_ bv8 32) (select v_ArrVal_1404 (_ bv8 32))) v_ArrVal_1404)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_item_~item~0#1.base_43|))))) (forall ((v_ArrVal_1406 (_ BitVec 32)) (v_arrayElimArr_1 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32))) (let ((.cse0 (select v_arrayElimArr_1 |c_~#list~0.offset|))) (or (= (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 (store (store (store (select |c_#memory_$Pointer$#1.base| .cse0) (_ bv4 32) (select (select |c_#memory_$Pointer$#1.base| |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv0 32) |ULTIMATE.start_create_item_#t~ite16#1.base|) (_ bv8 32) v_ArrVal_1406)) |c_~#list~0.base| v_arrayElimArr_1) .cse0) (_ bv4 32)) (_ bv0 32)) (not (= (select |c_#valid| .cse0) (_ bv0 1))))))) is different from false [2023-11-29 07:09:46,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:09:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005906018] [2023-11-29 07:09:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005906018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:09:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1955886936] [2023-11-29 07:09:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:09:46,223 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-29 07:09:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-29 07:09:46,224 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-29 07:09:46,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a1371ba-f08d-4acb-a4b8-454a3c8f844b/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2023-11-29 07:09:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:09:46,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 07:09:46,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:09:46,923 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 07:09:46,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 07:09:47,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:09:47,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 07:09:48,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:48,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:48,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:48,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 07:09:48,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 07:09:48,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 07:09:48,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 07:09:48,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 07:09:48,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 07:09:48,730 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-11-29 07:09:48,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 32 [2023-11-29 07:09:48,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:09:48,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 15 [2023-11-29 07:09:48,955 INFO L349 Elim1Store]: treesize reduction 15, result has 34.8 percent of original size [2023-11-29 07:09:48,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 22 [2023-11-29 07:09:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:09:48,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:09:49,435 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_append_one_~item~1#1.base|)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1469 (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse1 .cse2 v_ArrVal_1469)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))) (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse1 .cse2 v_ArrVal_1469)) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)))))) is different from false [2023-11-29 07:09:49,506 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32))) (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~head~0#1.base|) .cse2 v_ArrVal_1469))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))) (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32))) (= (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~head~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))))) is different from false [2023-11-29 07:09:49,863 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse2 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (forall ((v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse2 .cse3 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse0 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse0 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse1 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))) (not (= (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 (select v_ArrVal_1460 .cse3)) v_ArrVal_1460)))) (forall ((v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (= (_ bv0 32) (select (let ((.cse4 (let ((.cse5 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse2 .cse3 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse1 v_ArrVal_1469))))) (select .cse4 (select (select .cse4 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)))))) is different from false [2023-11-29 07:09:50,056 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse10 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse6 (= (_ bv8 32) .cse10)) (.cse7 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse4 (bvadd .cse10 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse5 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (forall ((v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (= (_ bv0 32) (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)))) (or (not .cse6) (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (not (= (store .cse7 .cse5 (select v_ArrVal_1460 .cse5)) v_ArrVal_1460)) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse8 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse8 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse8 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32))))) (or .cse6 (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (not (= (store (store .cse7 .cse4 (select v_ArrVal_1460 .cse4)) .cse5 (select v_ArrVal_1460 .cse5)) v_ArrVal_1460)) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)))))))) is different from false [2023-11-29 07:09:50,928 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (bvadd (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~link_field~0#1|) |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse10 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse0 (= (_ bv8 32) .cse10)) (.cse6 (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 |c_ULTIMATE.start_create_item_~link~0#1.offset|)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 |c_ULTIMATE.start_create_item_~link~0#1.base|)) (.cse4 (bvadd .cse10 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse5 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (or (not .cse0) (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (= (_ bv0 32) (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32))) (not (= v_ArrVal_1460 (store .cse6 .cse5 (select v_ArrVal_1460 .cse5))))))) (or .cse0 (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (= (_ bv0 32) (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse7 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse7 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse7 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32))) (not (= (store (store .cse6 .cse4 (select v_ArrVal_1460 .cse4)) .cse5 (select v_ArrVal_1460 .cse5)) v_ArrVal_1460))))) (forall ((v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (= (select (let ((.cse8 (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))))) (select .cse8 (select (select .cse8 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32)))))) is different from false [2023-11-29 07:09:51,503 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (bvadd (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~link_field~0#1|) |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse10 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse0 (= (_ bv8 32) .cse10)) (.cse6 (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|))) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|))) (.cse4 (bvadd .cse10 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse5 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (or .cse0 (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)) (not (= (store (store .cse6 .cse4 (select v_ArrVal_1460 .cse4)) .cse5 (select v_ArrVal_1460 .cse5)) v_ArrVal_1460))))) (forall ((v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (= (select (let ((.cse7 (let ((.cse8 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse8 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse8 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))))) (select .cse7 (select (select .cse7 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))) (or (not .cse0) (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (not (= v_ArrVal_1460 (store .cse6 .cse5 (select v_ArrVal_1460 .cse5)))) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)))))))) is different from false [2023-11-29 07:09:54,004 WARN L854 $PredicateComparison]: unable to prove that (or (let ((.cse11 (bvadd (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~link_field~0#1|) |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse10 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse0 (= (_ bv8 32) .cse10)) (.cse6 (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|))) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse3 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse11 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset|))) (.cse4 (bvadd .cse10 |c_ULTIMATE.start_create_item_~item~0#1.offset|)) (.cse5 (bvadd (_ bv8 32) |c_ULTIMATE.start_create_item_~item~0#1.offset|))) (and (or .cse0 (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)) (not (= (store (store .cse6 .cse4 (select v_ArrVal_1460 .cse4)) .cse5 (select v_ArrVal_1460 .cse5)) v_ArrVal_1460))))) (forall ((v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (= (select (let ((.cse7 (let ((.cse8 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse8 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse8 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))))) (select .cse7 (select (select .cse7 |c_~#list~0.base|) |c_~#list~0.offset|))) (_ bv4 32)) (_ bv0 32))) (or (not .cse0) (forall ((v_ArrVal_1470 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1460 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1463 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1469 (_ BitVec 32)) (v_ArrVal_1464 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_create_item_#t~ite16#1.base| (_ BitVec 32)) (v_ArrVal_1461 (_ BitVec 32))) (or (not (= v_ArrVal_1460 (store .cse6 .cse5 (select v_ArrVal_1460 .cse5)))) (= (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1460) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1470) (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse3 .cse4 |ULTIMATE.start_create_item_#t~ite16#1.base|) .cse5 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1463))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1469))) |c_~#list~0.base|) |c_~#list~0.offset|)) (_ bv4 32)) (_ bv0 32)))))))) |c_ULTIMATE.start_create_item_#t~short10#1|) is different from false [2023-11-29 07:10:54,384 WARN L293 SmtUtils]: Spent 59.94s on a formula simplification. DAG size of input: 147 DAG size of output: 90 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 07:10:54,384 INFO L349 Elim1Store]: treesize reduction 495, result has 35.1 percent of original size [2023-11-29 07:10:54,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 399 treesize of output 497