./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:38,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:38,355 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:47:38,361 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:38,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:38,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:38,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:38,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:38,390 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:38,391 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:38,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:38,392 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:38,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:38,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:38,394 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:38,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:38,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:38,396 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:38,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:38,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:38,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:38,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:38,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:38,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:38,400 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:38,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:38,401 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:38,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:38,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:38,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:38,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:38,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:38,404 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:38,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:38,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:38,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:38,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:38,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:38,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:38,408 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:38,409 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:38,410 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:38,410 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_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2023-11-26 10:47:38,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:38,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:38,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:38,778 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:38,779 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:38,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-tiling/mbpr3.c [2023-11-26 10:47:42,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:42,285 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:42,286 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/sv-benchmarks/c/array-tiling/mbpr3.c [2023-11-26 10:47:42,295 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/data/90629eb9e/414108ae26874a40a5d9187fad11faf9/FLAG8d38f6b86 [2023-11-26 10:47:42,309 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/data/90629eb9e/414108ae26874a40a5d9187fad11faf9 [2023-11-26 10:47:42,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:42,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:42,315 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:42,315 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:42,320 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:42,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9ac37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42, skipping insertion in model container [2023-11-26 10:47:42,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:42,543 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2023-11-26 10:47:42,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:42,619 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:42,641 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2023-11-26 10:47:42,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:42,682 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:42,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42 WrapperNode [2023-11-26 10:47:42,683 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:42,684 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:42,684 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:42,685 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:42,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,734 INFO L138 Inliner]: procedures = 15, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 116 [2023-11-26 10:47:42,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:42,735 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:42,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:42,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:42,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,754 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,771 INFO L175 MemorySlicer]: Split 30 memory accesses to 3 slices as follows [2, 8, 20]. 67 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 12 writes are split as follows [0, 0, 12]. [2023-11-26 10:47:42,772 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,772 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,786 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,788 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,790 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:42,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:42,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:42,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:42,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (1/1) ... [2023-11-26 10:47:42,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:42,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:42,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:42,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:42,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:42,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:47:42,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:47:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:47:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:47:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:47:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:47:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:42,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:47:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:47:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:47:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:47:43,058 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:43,062 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:43,404 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:43,440 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:43,441 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 10:47:43,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:43 BoogieIcfgContainer [2023-11-26 10:47:43,442 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:43,445 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:43,446 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:43,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:43,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:42" (1/3) ... [2023-11-26 10:47:43,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3d9d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:43, skipping insertion in model container [2023-11-26 10:47:43,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:42" (2/3) ... [2023-11-26 10:47:43,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3d9d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:43, skipping insertion in model container [2023-11-26 10:47:43,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:43" (3/3) ... [2023-11-26 10:47:43,455 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2023-11-26 10:47:43,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:43,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:47:43,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:43,552 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@7b9fb6ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:43,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:47:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:47:43,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:43,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:43,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:43,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:43,574 INFO L85 PathProgramCache]: Analyzing trace with hash 139679752, now seen corresponding path program 1 times [2023-11-26 10:47:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:43,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007957951] [2023-11-26 10:47:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:43,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:43,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007957951] [2023-11-26 10:47:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007957951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:43,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:43,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791190666] [2023-11-26 10:47:43,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:43,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:47:43,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:47:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:47:43,916 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:43,968 INFO L93 Difference]: Finished difference Result 52 states and 79 transitions. [2023-11-26 10:47:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:47:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:47:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:43,979 INFO L225 Difference]: With dead ends: 52 [2023-11-26 10:47:43,979 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 10:47:43,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:47:43,988 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:43,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 10:47:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-26 10:47:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-26 10:47:44,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2023-11-26 10:47:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:44,028 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-26 10:47:44,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-26 10:47:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:47:44,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:44,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:44,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:47:44,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:44,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash -834490832, now seen corresponding path program 1 times [2023-11-26 10:47:44,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:44,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424583849] [2023-11-26 10:47:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:44,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:44,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:44,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424583849] [2023-11-26 10:47:44,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424583849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:44,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:44,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:47:44,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772079276] [2023-11-26 10:47:44,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:44,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:44,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:44,411 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:44,503 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-11-26 10:47:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:44,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:47:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:44,507 INFO L225 Difference]: With dead ends: 29 [2023-11-26 10:47:44,507 INFO L226 Difference]: Without dead ends: 27 [2023-11-26 10:47:44,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:44,510 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:44,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-26 10:47:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-26 10:47:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-26 10:47:44,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-11-26 10:47:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:44,518 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-26 10:47:44,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-26 10:47:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:47:44,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:44,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:44,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:47:44,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:44,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash -834431250, now seen corresponding path program 1 times [2023-11-26 10:47:44,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:44,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943231904] [2023-11-26 10:47:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:44,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:44,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943231904] [2023-11-26 10:47:44,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943231904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:44,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:47:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121233886] [2023-11-26 10:47:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:44,968 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:45,122 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-11-26 10:47:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:47:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:45,129 INFO L225 Difference]: With dead ends: 53 [2023-11-26 10:47:45,130 INFO L226 Difference]: Without dead ends: 35 [2023-11-26 10:47:45,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:45,138 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:45,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-26 10:47:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2023-11-26 10:47:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-26 10:47:45,164 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2023-11-26 10:47:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:45,165 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-26 10:47:45,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-26 10:47:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:47:45,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:45,168 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] [2023-11-26 10:47:45,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:47:45,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:45,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1903088773, now seen corresponding path program 1 times [2023-11-26 10:47:45,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088421762] [2023-11-26 10:47:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:45,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:45,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088421762] [2023-11-26 10:47:45,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088421762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:45,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:45,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:45,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140331555] [2023-11-26 10:47:45,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:45,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:45,396 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:45,440 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-26 10:47:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:45,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-26 10:47:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:45,442 INFO L225 Difference]: With dead ends: 42 [2023-11-26 10:47:45,442 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 10:47:45,447 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 [2023-11-26 10:47:45,455 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:45,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 10:47:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-26 10:47:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-26 10:47:45,464 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2023-11-26 10:47:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:45,464 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-26 10:47:45,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-26 10:47:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:47:45,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:45,466 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] [2023-11-26 10:47:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:47:45,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:45,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1223030403, now seen corresponding path program 1 times [2023-11-26 10:47:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:45,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453359698] [2023-11-26 10:47:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:45,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:47:46,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:46,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453359698] [2023-11-26 10:47:46,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453359698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:46,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404994767] [2023-11-26 10:47:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:46,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:46,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:46,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:47:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:46,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 10:47:46,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:46,932 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 [2023-11-26 10:47:46,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-26 10:47:47,080 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 [2023-11-26 10:47:47,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:47,126 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 1 case distinctions, treesize of input 41 treesize of output 18 [2023-11-26 10:47:47,185 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 [2023-11-26 10:47:47,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:47,209 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 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-26 10:47:47,275 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 15 treesize of output 7 [2023-11-26 10:47:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:47,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:47,608 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 15 [2023-11-26 10:47:47,612 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 22 treesize of output 20 [2023-11-26 10:47:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:47,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404994767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:47,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:47,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-26 10:47:47,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795640093] [2023-11-26 10:47:47,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:47,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:47:47,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:47,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:47:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:47:47,680 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:48,062 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-11-26 10:47:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:47:48,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-26 10:47:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:48,065 INFO L225 Difference]: With dead ends: 75 [2023-11-26 10:47:48,065 INFO L226 Difference]: Without dead ends: 52 [2023-11-26 10:47:48,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:47:48,067 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 156 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:48,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 56 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-26 10:47:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2023-11-26 10:47:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-26 10:47:48,078 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 25 [2023-11-26 10:47:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:48,078 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-26 10:47:48,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-26 10:47:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 10:47:48,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:48,080 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] [2023-11-26 10:47:48,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:48,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:48,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:48,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash -488556627, now seen corresponding path program 1 times [2023-11-26 10:47:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307958100] [2023-11-26 10:47:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:49,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307958100] [2023-11-26 10:47:49,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307958100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:49,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977709283] [2023-11-26 10:47:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:49,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:49,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:49,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:47:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 10:47:49,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:49,387 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 [2023-11-26 10:47:49,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:49,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-26 10:47:49,485 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 [2023-11-26 10:47:49,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:49,509 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 1 case distinctions, treesize of input 30 treesize of output 18 [2023-11-26 10:47:49,615 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 15 treesize of output 7 [2023-11-26 10:47:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:47:49,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:49,829 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 17 [2023-11-26 10:47:49,832 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 20 [2023-11-26 10:47:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977709283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:49,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-26 10:47:49,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115896377] [2023-11-26 10:47:49,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:49,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 10:47:49,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 10:47:49,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:47:49,899 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:50,212 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-11-26 10:47:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:47:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-26 10:47:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:50,214 INFO L225 Difference]: With dead ends: 66 [2023-11-26 10:47:50,214 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:47:50,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:47:50,216 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:50,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 68 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:47:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2023-11-26 10:47:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-26 10:47:50,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2023-11-26 10:47:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:50,228 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-26 10:47:50,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-26 10:47:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 10:47:50,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:50,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:50,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:50,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,437 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:50,438 INFO L85 PathProgramCache]: Analyzing trace with hash -867211395, now seen corresponding path program 2 times [2023-11-26 10:47:50,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:50,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342827673] [2023-11-26 10:47:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:50,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:50,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:50,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342827673] [2023-11-26 10:47:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342827673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:50,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267958193] [2023-11-26 10:47:50,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:50,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:50,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:50,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:47:51,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:51,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:51,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:47:51,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:51,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:47:51,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:51,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-26 10:47:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:51,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:51,402 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 15 [2023-11-26 10:47:51,405 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 16 treesize of output 12 [2023-11-26 10:47:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:51,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267958193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:51,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:51,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2023-11-26 10:47:51,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793114349] [2023-11-26 10:47:51,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:51,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:47:51,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:51,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:47:51,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:47:51,429 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:51,774 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-26 10:47:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:47:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2023-11-26 10:47:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:51,776 INFO L225 Difference]: With dead ends: 59 [2023-11-26 10:47:51,776 INFO L226 Difference]: Without dead ends: 57 [2023-11-26 10:47:51,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:47:51,777 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:51,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 100 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-26 10:47:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-11-26 10:47:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-26 10:47:51,793 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 35 [2023-11-26 10:47:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:51,796 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-26 10:47:51,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-26 10:47:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:47:51,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:51,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:51,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:52,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:52,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:52,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash 777427373, now seen corresponding path program 3 times [2023-11-26 10:47:52,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749069876] [2023-11-26 10:47:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749069876] [2023-11-26 10:47:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749069876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:52,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832409558] [2023-11-26 10:47:52,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:47:52,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:52,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:52,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:52,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:47:52,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 10:47:52,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:52,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:47:52,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:53,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:53,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832409558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:53,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:53,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-11-26 10:47:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048278918] [2023-11-26 10:47:53,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 10:47:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 10:47:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2023-11-26 10:47:53,378 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:53,736 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2023-11-26 10:47:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:47:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 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 40 [2023-11-26 10:47:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:53,738 INFO L225 Difference]: With dead ends: 113 [2023-11-26 10:47:53,738 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 10:47:53,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 10:47:53,739 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:53,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 104 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:47:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 10:47:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-11-26 10:47:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-26 10:47:53,751 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2023-11-26 10:47:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:53,751 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-26 10:47:53,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 28 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-26 10:47:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-26 10:47:53,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:53,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:53,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:53,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:53,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:53,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash 495494460, now seen corresponding path program 4 times [2023-11-26 10:47:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:53,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162891399] [2023-11-26 10:47:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:53,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:47:54,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162891399] [2023-11-26 10:47:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162891399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138549152] [2023-11-26 10:47:54,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:47:54,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:54,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:54,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:47:54,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:47:54,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:55,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 10:47:55,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:55,112 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 [2023-11-26 10:47:55,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:55,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-26 10:47:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:47:55,205 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 31 treesize of output 11 [2023-11-26 10:47:55,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:47:55,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 33 [2023-11-26 10:47:55,423 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 15 treesize of output 7 [2023-11-26 10:47:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:47:55,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:02,827 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 59 treesize of output 53 [2023-11-26 10:48:02,833 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 102 treesize of output 94 [2023-11-26 10:48:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:48:02,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138549152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:02,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:02,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 26 [2023-11-26 10:48:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594899843] [2023-11-26 10:48:02,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 10:48:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 10:48:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=507, Unknown=2, NotChecked=0, Total=650 [2023-11-26 10:48:02,963 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:03,343 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-26 10:48:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:48:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 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 49 [2023-11-26 10:48:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:03,345 INFO L225 Difference]: With dead ends: 64 [2023-11-26 10:48:03,345 INFO L226 Difference]: Without dead ends: 55 [2023-11-26 10:48:03,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=172, Invalid=582, Unknown=2, NotChecked=0, Total=756 [2023-11-26 10:48:03,347 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:03,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 128 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:48:03,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-26 10:48:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2023-11-26 10:48:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-11-26 10:48:03,362 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2023-11-26 10:48:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:03,362 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-11-26 10:48:03,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-11-26 10:48:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-26 10:48:03,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:03,364 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:03,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 10:48:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:03,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:03,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1175552830, now seen corresponding path program 5 times [2023-11-26 10:48:03,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:03,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724846788] [2023-11-26 10:48:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:03,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:48:05,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724846788] [2023-11-26 10:48:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724846788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732914900] [2023-11-26 10:48:05,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:48:05,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:05,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:05,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:05,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:48:05,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-26 10:48:05,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:05,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-26 10:48:06,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:06,140 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 [2023-11-26 10:48:06,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-11-26 10:48:06,296 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 [2023-11-26 10:48:06,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:06,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2023-11-26 10:48:06,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:06,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2023-11-26 10:48:06,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:06,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 35 [2023-11-26 10:48:06,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:06,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2023-11-26 10:48:06,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:06,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 35 [2023-11-26 10:48:06,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:06,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2023-11-26 10:48:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:48:06,730 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-11-26 10:48:06,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 57 treesize of output 50 [2023-11-26 10:48:07,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:07,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 10 [2023-11-26 10:48:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:07,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:07,814 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 17 [2023-11-26 10:48:07,817 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 20 [2023-11-26 10:48:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:48:07,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732914900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:07,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:07,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 12] total 35 [2023-11-26 10:48:07,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797291602] [2023-11-26 10:48:07,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:07,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-26 10:48:07,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-26 10:48:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 10:48:07,976 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 35 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 35 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:10,480 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2023-11-26 10:48:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-26 10:48:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 35 states have internal predecessors, (132), 0 states have call successors, (0), 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 49 [2023-11-26 10:48:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:10,483 INFO L225 Difference]: With dead ends: 141 [2023-11-26 10:48:10,483 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 10:48:10,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=682, Invalid=3350, Unknown=0, NotChecked=0, Total=4032 [2023-11-26 10:48:10,490 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 576 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:10,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 162 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 10:48:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 10:48:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 84. [2023-11-26 10:48:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2023-11-26 10:48:10,545 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 49 [2023-11-26 10:48:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:10,545 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2023-11-26 10:48:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 35 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2023-11-26 10:48:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 10:48:10,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:10,548 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:10,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:10,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:10,752 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:10,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:10,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1363532885, now seen corresponding path program 6 times [2023-11-26 10:48:10,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:10,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687120710] [2023-11-26 10:48:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:10,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-26 10:48:11,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687120710] [2023-11-26 10:48:11,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687120710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:11,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110178566] [2023-11-26 10:48:11,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:48:11,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:11,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:11,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:11,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:48:11,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-26 10:48:11,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:11,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:48:11,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-26 10:48:11,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-26 10:48:11,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110178566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:11,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:11,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-26 10:48:11,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297187859] [2023-11-26 10:48:11,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:11,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:48:11,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:48:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:11,710 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:12,127 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2023-11-26 10:48:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:48:12,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-26 10:48:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:12,130 INFO L225 Difference]: With dead ends: 173 [2023-11-26 10:48:12,130 INFO L226 Difference]: Without dead ends: 135 [2023-11-26 10:48:12,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:48:12,134 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:12,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 73 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:48:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-26 10:48:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 95. [2023-11-26 10:48:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2023-11-26 10:48:12,174 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 57 [2023-11-26 10:48:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:12,175 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2023-11-26 10:48:12,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2023-11-26 10:48:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-26 10:48:12,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:12,178 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:12,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:12,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:12,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:12,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1418828802, now seen corresponding path program 7 times [2023-11-26 10:48:12,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:12,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329001628] [2023-11-26 10:48:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:12,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:48:13,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:13,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329001628] [2023-11-26 10:48:13,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329001628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:13,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755878046] [2023-11-26 10:48:13,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:48:13,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:13,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:13,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:48:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:13,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 10:48:13,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:13,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:48:13,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:13,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2023-11-26 10:48:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:48:14,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:14,475 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 15 [2023-11-26 10:48:14,480 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 16 treesize of output 12 [2023-11-26 10:48:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:48:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755878046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:14,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:14,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 26 [2023-11-26 10:48:14,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533788842] [2023-11-26 10:48:14,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:14,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 10:48:14,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 10:48:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-11-26 10:48:14,496 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:15,834 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2023-11-26 10:48:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-26 10:48:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 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 59 [2023-11-26 10:48:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:15,836 INFO L225 Difference]: With dead ends: 149 [2023-11-26 10:48:15,836 INFO L226 Difference]: Without dead ends: 147 [2023-11-26 10:48:15,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=2114, Unknown=0, NotChecked=0, Total=2450 [2023-11-26 10:48:15,839 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:15,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 182 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 10:48:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-26 10:48:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2023-11-26 10:48:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.09009009009009) internal successors, (121), 111 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2023-11-26 10:48:15,875 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 59 [2023-11-26 10:48:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:15,875 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2023-11-26 10:48:15,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 26 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2023-11-26 10:48:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-26 10:48:15,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:15,878 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:15,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:16,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 10:48:16,085 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:16,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1826539578, now seen corresponding path program 8 times [2023-11-26 10:48:16,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:16,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225178491] [2023-11-26 10:48:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:16,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-26 10:48:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225178491] [2023-11-26 10:48:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225178491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845232942] [2023-11-26 10:48:16,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:48:16,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:16,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:16,399 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:16,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:48:16,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:48:16,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:16,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:48:16,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-26 10:48:16,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-26 10:48:17,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845232942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:17,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:17,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-26 10:48:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604771867] [2023-11-26 10:48:17,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:17,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:48:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:17,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:48:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:17,150 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:17,671 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2023-11-26 10:48:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:48:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 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 60 [2023-11-26 10:48:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:17,673 INFO L225 Difference]: With dead ends: 203 [2023-11-26 10:48:17,673 INFO L226 Difference]: Without dead ends: 133 [2023-11-26 10:48:17,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-11-26 10:48:17,675 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:17,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 102 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:48:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-26 10:48:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2023-11-26 10:48:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2023-11-26 10:48:17,699 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 60 [2023-11-26 10:48:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:17,699 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2023-11-26 10:48:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2023-11-26 10:48:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 10:48:17,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:17,701 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:17,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 10:48:17,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:48:17,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:17,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash -250933029, now seen corresponding path program 9 times [2023-11-26 10:48:17,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:17,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72580462] [2023-11-26 10:48:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:48:19,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:19,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72580462] [2023-11-26 10:48:19,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72580462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:19,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311229082] [2023-11-26 10:48:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:48:19,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:19,678 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:19,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a72fd03c-cd0c-4eb5-b88c-546f4f1762ed/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:48:20,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-26 10:48:20,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:20,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-26 10:48:20,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:20,880 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 16 treesize of output 12 [2023-11-26 10:48:20,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:20,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 55 treesize of output 28 [2023-11-26 10:48:21,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 38 treesize of output 28 [2023-11-26 10:48:21,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:21,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 55 [2023-11-26 10:48:21,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:21,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 44 treesize of output 25 [2023-11-26 10:48:21,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:21,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 41 [2023-11-26 10:48:21,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:21,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 41 treesize of output 37 [2023-11-26 10:48:21,712 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-11-26 10:48:21,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 79 treesize of output 64 [2023-11-26 10:48:21,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:21,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 40 [2023-11-26 10:48:21,952 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-11-26 10:48:21,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 79 treesize of output 64 [2023-11-26 10:48:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:48:22,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:25,546 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 133 treesize of output 121 [2023-11-26 10:48:25,553 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 99 treesize of output 91 [2023-11-26 10:48:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:48:27,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311229082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:27,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:27,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 30, 26] total 65 [2023-11-26 10:48:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416937697] [2023-11-26 10:48:27,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:27,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-26 10:48:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:27,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-26 10:48:27,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3719, Unknown=0, NotChecked=0, Total=4160 [2023-11-26 10:48:27,067 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 65 states, 65 states have (on average 2.6769230769230767) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)